├── .gitignore ├── LICENSE ├── README.md ├── app ├── .dockerignore ├── .gitattributes ├── .gitignore ├── ClientApp │ ├── .gitignore │ ├── README.md │ ├── package-lock.json │ ├── package.json │ ├── public │ │ ├── favicon.ico │ │ ├── index.html │ │ └── manifest.json │ ├── src │ │ ├── App.js │ │ ├── App.test.js │ │ ├── components │ │ │ ├── Home.js │ │ │ ├── Layout.js │ │ │ ├── NavMenu.css │ │ │ ├── NavMenu.js │ │ │ └── ViewReplay.js │ │ ├── custom.css │ │ ├── index.js │ │ └── registerServiceWorker.js │ └── yarn.lock ├── Controllers │ └── ReplayController.cs ├── Data │ ├── FortniteElimination.cs │ ├── FortniteGame.cs │ ├── FortniteGameAnalysis.cs │ └── FortnitePlayer.cs ├── Dockerfile ├── ExternalApis │ ├── FortniteIoApiClient.cs │ ├── ReplayAnalysisStorage.cs │ ├── ReplayStorage.cs │ └── S3Response.cs ├── FortniteReplayAnalyzer.csproj ├── FortniteReplayAnalyzer.sln ├── Pages │ ├── Error.cshtml │ ├── Error.cshtml.cs │ └── _ViewImports.cshtml ├── Program.cs ├── Properties │ └── launchSettings.json ├── ReplayProcessing │ └── FortniteReplayAnalyzer.cs ├── Startup.cs ├── appsettings.Development.json └── appsettings.json └── cli ├── Program.cs └── cli.csproj /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | ## 4 | ## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore 5 | 6 | # User-specific files 7 | *.rsuser 8 | *.suo 9 | *.user 10 | *.userosscache 11 | *.sln.docstates 12 | 13 | # User-specific files (MonoDevelop/Xamarin Studio) 14 | *.userprefs 15 | 16 | # Mono auto generated files 17 | mono_crash.* 18 | 19 | # Build results 20 | [Dd]ebug/ 21 | [Dd]ebugPublic/ 22 | [Rr]elease/ 23 | [Rr]eleases/ 24 | x64/ 25 | x86/ 26 | [Aa][Rr][Mm]/ 27 | [Aa][Rr][Mm]64/ 28 | bld/ 29 | [Bb]in/ 30 | [Oo]bj/ 31 | [Ll]og/ 32 | [Ll]ogs/ 33 | 34 | # Visual Studio 2015/2017 cache/options directory 35 | .vs/ 36 | # Uncomment if you have tasks that create the project's static files in wwwroot 37 | #wwwroot/ 38 | 39 | # Visual Studio 2017 auto generated files 40 | Generated\ Files/ 41 | 42 | # MSTest test Results 43 | [Tt]est[Rr]esult*/ 44 | [Bb]uild[Ll]og.* 45 | 46 | # NUnit 47 | *.VisualState.xml 48 | TestResult.xml 49 | nunit-*.xml 50 | 51 | # Build Results of an ATL Project 52 | [Dd]ebugPS/ 53 | [Rr]eleasePS/ 54 | dlldata.c 55 | 56 | # Benchmark Results 57 | BenchmarkDotNet.Artifacts/ 58 | 59 | # .NET Core 60 | project.lock.json 61 | project.fragment.lock.json 62 | artifacts/ 63 | 64 | # StyleCop 65 | StyleCopReport.xml 66 | 67 | # Files built by Visual Studio 68 | *_i.c 69 | *_p.c 70 | *_h.h 71 | *.ilk 72 | *.meta 73 | *.obj 74 | *.iobj 75 | *.pch 76 | *.pdb 77 | *.ipdb 78 | *.pgc 79 | *.pgd 80 | *.rsp 81 | *.sbr 82 | *.tlb 83 | *.tli 84 | *.tlh 85 | *.tmp 86 | *.tmp_proj 87 | *_wpftmp.csproj 88 | *.log 89 | *.vspscc 90 | *.vssscc 91 | .builds 92 | *.pidb 93 | *.svclog 94 | *.scc 95 | 96 | # Chutzpah Test files 97 | _Chutzpah* 98 | 99 | # Visual C++ cache files 100 | ipch/ 101 | *.aps 102 | *.ncb 103 | *.opendb 104 | *.opensdf 105 | *.sdf 106 | *.cachefile 107 | *.VC.db 108 | *.VC.VC.opendb 109 | 110 | # Visual Studio profiler 111 | *.psess 112 | *.vsp 113 | *.vspx 114 | *.sap 115 | 116 | # Visual Studio Trace Files 117 | *.e2e 118 | 119 | # TFS 2012 Local Workspace 120 | $tf/ 121 | 122 | # Guidance Automation Toolkit 123 | *.gpState 124 | 125 | # ReSharper is a .NET coding add-in 126 | _ReSharper*/ 127 | *.[Rr]e[Ss]harper 128 | *.DotSettings.user 129 | 130 | # TeamCity is a build add-in 131 | _TeamCity* 132 | 133 | # DotCover is a Code Coverage Tool 134 | *.dotCover 135 | 136 | # AxoCover is a Code Coverage Tool 137 | .axoCover/* 138 | !.axoCover/settings.json 139 | 140 | # Visual Studio code coverage results 141 | *.coverage 142 | *.coveragexml 143 | 144 | # NCrunch 145 | _NCrunch_* 146 | .*crunch*.local.xml 147 | nCrunchTemp_* 148 | 149 | # MightyMoose 150 | *.mm.* 151 | AutoTest.Net/ 152 | 153 | # Web workbench (sass) 154 | .sass-cache/ 155 | 156 | # Installshield output folder 157 | [Ee]xpress/ 158 | 159 | # DocProject is a documentation generator add-in 160 | DocProject/buildhelp/ 161 | DocProject/Help/*.HxT 162 | DocProject/Help/*.HxC 163 | DocProject/Help/*.hhc 164 | DocProject/Help/*.hhk 165 | DocProject/Help/*.hhp 166 | DocProject/Help/Html2 167 | DocProject/Help/html 168 | 169 | # Click-Once directory 170 | publish/ 171 | 172 | # Publish Web Output 173 | *.[Pp]ublish.xml 174 | *.azurePubxml 175 | # Note: Comment the next line if you want to checkin your web deploy settings, 176 | # but database connection strings (with potential passwords) will be unencrypted 177 | *.pubxml 178 | *.publishproj 179 | 180 | # Microsoft Azure Web App publish settings. Comment the next line if you want to 181 | # checkin your Azure Web App publish settings, but sensitive information contained 182 | # in these scripts will be unencrypted 183 | PublishScripts/ 184 | 185 | # NuGet Packages 186 | *.nupkg 187 | # NuGet Symbol Packages 188 | *.snupkg 189 | # The packages folder can be ignored because of Package Restore 190 | **/[Pp]ackages/* 191 | # except build/, which is used as an MSBuild target. 192 | !**/[Pp]ackages/build/ 193 | # Uncomment if necessary however generally it will be regenerated when needed 194 | #!**/[Pp]ackages/repositories.config 195 | # NuGet v3's project.json files produces more ignorable files 196 | *.nuget.props 197 | *.nuget.targets 198 | 199 | # Microsoft Azure Build Output 200 | csx/ 201 | *.build.csdef 202 | 203 | # Microsoft Azure Emulator 204 | ecf/ 205 | rcf/ 206 | 207 | # Windows Store app package directories and files 208 | AppPackages/ 209 | BundleArtifacts/ 210 | Package.StoreAssociation.xml 211 | _pkginfo.txt 212 | *.appx 213 | *.appxbundle 214 | *.appxupload 215 | 216 | # Visual Studio cache files 217 | # files ending in .cache can be ignored 218 | *.[Cc]ache 219 | # but keep track of directories ending in .cache 220 | !?*.[Cc]ache/ 221 | 222 | # Others 223 | ClientBin/ 224 | ~$* 225 | *~ 226 | *.dbmdl 227 | *.dbproj.schemaview 228 | *.jfm 229 | *.pfx 230 | *.publishsettings 231 | orleans.codegen.cs 232 | 233 | # Including strong name files can present a security risk 234 | # (https://github.com/github/gitignore/pull/2483#issue-259490424) 235 | #*.snk 236 | 237 | # Since there are multiple workflows, uncomment next line to ignore bower_components 238 | # (https://github.com/github/gitignore/pull/1529#issuecomment-104372622) 239 | #bower_components/ 240 | 241 | # RIA/Silverlight projects 242 | Generated_Code/ 243 | 244 | # Backup & report files from converting an old project file 245 | # to a newer Visual Studio version. Backup files are not needed, 246 | # because we have git ;-) 247 | _UpgradeReport_Files/ 248 | Backup*/ 249 | UpgradeLog*.XML 250 | UpgradeLog*.htm 251 | ServiceFabricBackup/ 252 | *.rptproj.bak 253 | 254 | # SQL Server files 255 | *.mdf 256 | *.ldf 257 | *.ndf 258 | 259 | # Business Intelligence projects 260 | *.rdl.data 261 | *.bim.layout 262 | *.bim_*.settings 263 | *.rptproj.rsuser 264 | *- [Bb]ackup.rdl 265 | *- [Bb]ackup ([0-9]).rdl 266 | *- [Bb]ackup ([0-9][0-9]).rdl 267 | 268 | # Microsoft Fakes 269 | FakesAssemblies/ 270 | 271 | # GhostDoc plugin setting file 272 | *.GhostDoc.xml 273 | 274 | # Node.js Tools for Visual Studio 275 | .ntvs_analysis.dat 276 | node_modules/ 277 | 278 | # Visual Studio 6 build log 279 | *.plg 280 | 281 | # Visual Studio 6 workspace options file 282 | *.opt 283 | 284 | # Visual Studio 6 auto-generated workspace file (contains which files were open etc.) 285 | *.vbw 286 | 287 | # Visual Studio LightSwitch build output 288 | **/*.HTMLClient/GeneratedArtifacts 289 | **/*.DesktopClient/GeneratedArtifacts 290 | **/*.DesktopClient/ModelManifest.xml 291 | **/*.Server/GeneratedArtifacts 292 | **/*.Server/ModelManifest.xml 293 | _Pvt_Extensions 294 | 295 | # Paket dependency manager 296 | .paket/paket.exe 297 | paket-files/ 298 | 299 | # FAKE - F# Make 300 | .fake/ 301 | 302 | # CodeRush personal settings 303 | .cr/personal 304 | 305 | # Python Tools for Visual Studio (PTVS) 306 | __pycache__/ 307 | *.pyc 308 | 309 | # Cake - Uncomment if you are using it 310 | # tools/** 311 | # !tools/packages.config 312 | 313 | # Tabs Studio 314 | *.tss 315 | 316 | # Telerik's JustMock configuration file 317 | *.jmconfig 318 | 319 | # BizTalk build output 320 | *.btp.cs 321 | *.btm.cs 322 | *.odx.cs 323 | *.xsd.cs 324 | 325 | # OpenCover UI analysis results 326 | OpenCover/ 327 | 328 | # Azure Stream Analytics local run output 329 | ASALocalRun/ 330 | 331 | # MSBuild Binary and Structured Log 332 | *.binlog 333 | 334 | # NVidia Nsight GPU debugger configuration file 335 | *.nvuser 336 | 337 | # MFractors (Xamarin productivity tool) working folder 338 | .mfractor/ 339 | 340 | # Local History for Visual Studio 341 | .localhistory/ 342 | 343 | # BeatPulse healthcheck temp database 344 | healthchecksdb 345 | 346 | # Backup folder for Package Reference Convert tool in Visual Studio 2017 347 | MigrationBackup/ 348 | 349 | # Ionide (cross platform F# VS Code tools) working folder 350 | .ionide/ 351 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2020 Christian Neverdal 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Fortnite-Replay-Analyzer 2 | The Ultimate Fortnite Replay Analyzer. Hosted at https://frenzy.farm 3 | -------------------------------------------------------------------------------- /app/.dockerignore: -------------------------------------------------------------------------------- 1 | **/node_modules 2 | obj/ 3 | .git/ 4 | bin/ 5 | keys.json 6 | aws/ 7 | deploy 8 | build-docker-image 9 | provision 10 | -------------------------------------------------------------------------------- /app/.gitattributes: -------------------------------------------------------------------------------- 1 | * text=auto 2 | 3 | *.cs diff=csharp 4 | 5 | *.sln merge=binary 6 | *.csproj merge=binary 7 | *.vcxproj merge=binary -------------------------------------------------------------------------------- /app/.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | 4 | # User-specific files 5 | *.suo 6 | *.user 7 | *.userosscache 8 | *.sln.docstates 9 | 10 | # User-specific files (MonoDevelop/Xamarin Studio) 11 | *.userprefs 12 | 13 | # Build results 14 | [Dd]ebug/ 15 | [Dd]ebugPublic/ 16 | [Rr]elease/ 17 | [Rr]eleases/ 18 | x64/ 19 | x86/ 20 | build/ 21 | bld/ 22 | bin/ 23 | Bin/ 24 | obj/ 25 | Obj/ 26 | 27 | # Visual Studio 2015 cache/options directory 28 | .vs/ 29 | /wwwroot/dist/ 30 | 31 | # MSTest test Results 32 | [Tt]est[Rr]esult*/ 33 | [Bb]uild[Ll]og.* 34 | 35 | # NUNIT 36 | *.VisualState.xml 37 | TestResult.xml 38 | 39 | # Build Results of an ATL Project 40 | [Dd]ebugPS/ 41 | [Rr]eleasePS/ 42 | dlldata.c 43 | 44 | *_i.c 45 | *_p.c 46 | *_i.h 47 | *.ilk 48 | *.meta 49 | *.obj 50 | *.pch 51 | *.pdb 52 | *.pgc 53 | *.pgd 54 | *.rsp 55 | *.sbr 56 | *.tlb 57 | *.tli 58 | *.tlh 59 | *.tmp 60 | *.tmp_proj 61 | *.log 62 | *.vspscc 63 | *.vssscc 64 | .builds 65 | *.pidb 66 | *.svclog 67 | *.scc 68 | 69 | # Chutzpah Test files 70 | _Chutzpah* 71 | 72 | # Visual C++ cache files 73 | ipch/ 74 | *.aps 75 | *.ncb 76 | *.opendb 77 | *.opensdf 78 | *.sdf 79 | *.cachefile 80 | 81 | # Visual Studio profiler 82 | *.psess 83 | *.vsp 84 | *.vspx 85 | *.sap 86 | 87 | # TFS 2012 Local Workspace 88 | $tf/ 89 | 90 | # Guidance Automation Toolkit 91 | *.gpState 92 | 93 | # ReSharper is a .NET coding add-in 94 | _ReSharper*/ 95 | *.[Rr]e[Ss]harper 96 | *.DotSettings.user 97 | 98 | # JustCode is a .NET coding add-in 99 | .JustCode 100 | 101 | # TeamCity is a build add-in 102 | _TeamCity* 103 | 104 | # DotCover is a Code Coverage Tool 105 | *.dotCover 106 | 107 | # NCrunch 108 | _NCrunch_* 109 | .*crunch*.local.xml 110 | nCrunchTemp_* 111 | 112 | # MightyMoose 113 | *.mm.* 114 | AutoTest.Net/ 115 | 116 | # Web workbench (sass) 117 | .sass-cache/ 118 | 119 | # Installshield output folder 120 | [Ee]xpress/ 121 | 122 | # DocProject is a documentation generator add-in 123 | DocProject/buildhelp/ 124 | DocProject/Help/*.HxT 125 | DocProject/Help/*.HxC 126 | DocProject/Help/*.hhc 127 | DocProject/Help/*.hhk 128 | DocProject/Help/*.hhp 129 | DocProject/Help/Html2 130 | DocProject/Help/html 131 | 132 | # Click-Once directory 133 | publish/ 134 | 135 | # Publish Web Output 136 | *.[Pp]ublish.xml 137 | *.azurePubxml 138 | # TODO: Comment the next line if you want to checkin your web deploy settings 139 | # but database connection strings (with potential passwords) will be unencrypted 140 | *.pubxml 141 | *.publishproj 142 | 143 | # NuGet Packages 144 | *.nupkg 145 | # The packages folder can be ignored because of Package Restore 146 | **/packages/* 147 | # except build/, which is used as an MSBuild target. 148 | !**/packages/build/ 149 | # Uncomment if necessary however generally it will be regenerated when needed 150 | #!**/packages/repositories.config 151 | 152 | # Microsoft Azure Build Output 153 | csx/ 154 | *.build.csdef 155 | 156 | # Microsoft Azure Emulator 157 | ecf/ 158 | rcf/ 159 | 160 | # Microsoft Azure ApplicationInsights config file 161 | ApplicationInsights.config 162 | 163 | # Windows Store app package directory 164 | AppPackages/ 165 | BundleArtifacts/ 166 | 167 | # Visual Studio cache files 168 | # files ending in .cache can be ignored 169 | *.[Cc]ache 170 | # but keep track of directories ending in .cache 171 | !*.[Cc]ache/ 172 | 173 | # Others 174 | ClientBin/ 175 | ~$* 176 | *~ 177 | *.dbmdl 178 | *.dbproj.schemaview 179 | *.pfx 180 | *.publishsettings 181 | orleans.codegen.cs 182 | 183 | /node_modules 184 | 185 | # RIA/Silverlight projects 186 | Generated_Code/ 187 | 188 | # Backup & report files from converting an old project file 189 | # to a newer Visual Studio version. Backup files are not needed, 190 | # because we have git ;-) 191 | _UpgradeReport_Files/ 192 | Backup*/ 193 | UpgradeLog*.XML 194 | UpgradeLog*.htm 195 | 196 | # SQL Server files 197 | *.mdf 198 | *.ldf 199 | 200 | # Business Intelligence projects 201 | *.rdl.data 202 | *.bim.layout 203 | *.bim_*.settings 204 | 205 | # Microsoft Fakes 206 | FakesAssemblies/ 207 | 208 | # GhostDoc plugin setting file 209 | *.GhostDoc.xml 210 | 211 | # Node.js Tools for Visual Studio 212 | .ntvs_analysis.dat 213 | 214 | # Visual Studio 6 build log 215 | *.plg 216 | 217 | # Visual Studio 6 workspace options file 218 | *.opt 219 | 220 | # Visual Studio LightSwitch build output 221 | **/*.HTMLClient/GeneratedArtifacts 222 | **/*.DesktopClient/GeneratedArtifacts 223 | **/*.DesktopClient/ModelManifest.xml 224 | **/*.Server/GeneratedArtifacts 225 | **/*.Server/ModelManifest.xml 226 | _Pvt_Extensions 227 | 228 | # Paket dependency manager 229 | .paket/paket.exe 230 | 231 | # FAKE - F# Make 232 | .fake/ 233 | 234 | # Secrets 235 | keys.json 236 | -------------------------------------------------------------------------------- /app/ClientApp/.gitignore: -------------------------------------------------------------------------------- 1 | # See https://help.github.com/ignore-files/ for more about ignoring files. 2 | 3 | # dependencies 4 | /node_modules 5 | 6 | # testing 7 | /coverage 8 | 9 | # production 10 | /build 11 | 12 | # misc 13 | .DS_Store 14 | .env.local 15 | .env.development.local 16 | .env.test.local 17 | .env.production.local 18 | 19 | npm-debug.log* 20 | yarn-debug.log* 21 | yarn-error.log* 22 | -------------------------------------------------------------------------------- /app/ClientApp/README.md: -------------------------------------------------------------------------------- 1 | This project was bootstrapped with [Create React App](https://github.com/facebookincubator/create-react-app). 2 | 3 | Below you will find some information on how to perform common tasks.
4 | You can find the most recent version of this guide [here](https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md). 5 | 6 | ## Table of Contents 7 | 8 | - [Updating to New Releases](#updating-to-new-releases) 9 | - [Sending Feedback](#sending-feedback) 10 | - [Folder Structure](#folder-structure) 11 | - [Available Scripts](#available-scripts) 12 | - [npm start](#npm-start) 13 | - [npm test](#npm-test) 14 | - [npm run build](#npm-run-build) 15 | - [npm run eject](#npm-run-eject) 16 | - [Supported Language Features and Polyfills](#supported-language-features-and-polyfills) 17 | - [Syntax Highlighting in the Editor](#syntax-highlighting-in-the-editor) 18 | - [Displaying Lint Output in the Editor](#displaying-lint-output-in-the-editor) 19 | - [Debugging in the Editor](#debugging-in-the-editor) 20 | - [Formatting Code Automatically](#formatting-code-automatically) 21 | - [Changing the Page ``](#changing-the-page-title) 22 | - [Installing a Dependency](#installing-a-dependency) 23 | - [Importing a Component](#importing-a-component) 24 | - [Code Splitting](#code-splitting) 25 | - [Adding a Stylesheet](#adding-a-stylesheet) 26 | - [Post-Processing CSS](#post-processing-css) 27 | - [Adding a CSS Preprocessor (Sass, Less etc.)](#adding-a-css-preprocessor-sass-less-etc) 28 | - [Adding Images, Fonts, and Files](#adding-images-fonts-and-files) 29 | - [Using the `public` Folder](#using-the-public-folder) 30 | - [Changing the HTML](#changing-the-html) 31 | - [Adding Assets Outside of the Module System](#adding-assets-outside-of-the-module-system) 32 | - [When to Use the `public` Folder](#when-to-use-the-public-folder) 33 | - [Using Global Variables](#using-global-variables) 34 | - [Adding Bootstrap](#adding-bootstrap) 35 | - [Using a Custom Theme](#using-a-custom-theme) 36 | - [Adding Flow](#adding-flow) 37 | - [Adding Custom Environment Variables](#adding-custom-environment-variables) 38 | - [Referencing Environment Variables in the HTML](#referencing-environment-variables-in-the-html) 39 | - [Adding Temporary Environment Variables In Your Shell](#adding-temporary-environment-variables-in-your-shell) 40 | - [Adding Development Environment Variables In `.env`](#adding-development-environment-variables-in-env) 41 | - [Can I Use Decorators?](#can-i-use-decorators) 42 | - [Integrating with an API Backend](#integrating-with-an-api-backend) 43 | - [Node](#node) 44 | - [Ruby on Rails](#ruby-on-rails) 45 | - [Proxying API Requests in Development](#proxying-api-requests-in-development) 46 | - ["Invalid Host Header" Errors After Configuring Proxy](#invalid-host-header-errors-after-configuring-proxy) 47 | - [Configuring the Proxy Manually](#configuring-the-proxy-manually) 48 | - [Configuring a WebSocket Proxy](#configuring-a-websocket-proxy) 49 | - [Using HTTPS in Development](#using-https-in-development) 50 | - [Generating Dynamic `<meta>` Tags on the Server](#generating-dynamic-meta-tags-on-the-server) 51 | - [Pre-Rendering into Static HTML Files](#pre-rendering-into-static-html-files) 52 | - [Injecting Data from the Server into the Page](#injecting-data-from-the-server-into-the-page) 53 | - [Running Tests](#running-tests) 54 | - [Filename Conventions](#filename-conventions) 55 | - [Command Line Interface](#command-line-interface) 56 | - [Version Control Integration](#version-control-integration) 57 | - [Writing Tests](#writing-tests) 58 | - [Testing Components](#testing-components) 59 | - [Using Third Party Assertion Libraries](#using-third-party-assertion-libraries) 60 | - [Initializing Test Environment](#initializing-test-environment) 61 | - [Focusing and Excluding Tests](#focusing-and-excluding-tests) 62 | - [Coverage Reporting](#coverage-reporting) 63 | - [Continuous Integration](#continuous-integration) 64 | - [Disabling jsdom](#disabling-jsdom) 65 | - [Snapshot Testing](#snapshot-testing) 66 | - [Editor Integration](#editor-integration) 67 | - [Developing Components in Isolation](#developing-components-in-isolation) 68 | - [Getting Started with Storybook](#getting-started-with-storybook) 69 | - [Getting Started with Styleguidist](#getting-started-with-styleguidist) 70 | - [Making a Progressive Web App](#making-a-progressive-web-app) 71 | - [Opting Out of Caching](#opting-out-of-caching) 72 | - [Offline-First Considerations](#offline-first-considerations) 73 | - [Progressive Web App Metadata](#progressive-web-app-metadata) 74 | - [Analyzing the Bundle Size](#analyzing-the-bundle-size) 75 | - [Deployment](#deployment) 76 | - [Static Server](#static-server) 77 | - [Other Solutions](#other-solutions) 78 | - [Serving Apps with Client-Side Routing](#serving-apps-with-client-side-routing) 79 | - [Building for Relative Paths](#building-for-relative-paths) 80 | - [Azure](#azure) 81 | - [Firebase](#firebase) 82 | - [GitHub Pages](#github-pages) 83 | - [Heroku](#heroku) 84 | - [Netlify](#netlify) 85 | - [Now](#now) 86 | - [S3 and CloudFront](#s3-and-cloudfront) 87 | - [Surge](#surge) 88 | - [Advanced Configuration](#advanced-configuration) 89 | - [Troubleshooting](#troubleshooting) 90 | - [`npm start` doesn’t detect changes](#npm-start-doesnt-detect-changes) 91 | - [`npm test` hangs on macOS Sierra](#npm-test-hangs-on-macos-sierra) 92 | - [`npm run build` exits too early](#npm-run-build-exits-too-early) 93 | - [`npm run build` fails on Heroku](#npm-run-build-fails-on-heroku) 94 | - [`npm run build` fails to minify](#npm-run-build-fails-to-minify) 95 | - [Moment.js locales are missing](#momentjs-locales-are-missing) 96 | - [Something Missing?](#something-missing) 97 | 98 | ## Updating to New Releases 99 | 100 | Create React App is divided into two packages: 101 | 102 | * `create-react-app` is a global command-line utility that you use to create new projects. 103 | * `react-scripts` is a development dependency in the generated projects (including this one). 104 | 105 | You almost never need to update `create-react-app` itself: it delegates all the setup to `react-scripts`. 106 | 107 | When you run `create-react-app`, it always creates the project with the latest version of `react-scripts` so you’ll get all the new features and improvements in newly created apps automatically. 108 | 109 | To update an existing project to a new version of `react-scripts`, [open the changelog](https://github.com/facebookincubator/create-react-app/blob/master/CHANGELOG.md), find the version you’re currently on (check `package.json` in this folder if you’re not sure), and apply the migration instructions for the newer versions. 110 | 111 | In most cases bumping the `react-scripts` version in `package.json` and running `npm install` in this folder should be enough, but it’s good to consult the [changelog](https://github.com/facebookincubator/create-react-app/blob/master/CHANGELOG.md) for potential breaking changes. 112 | 113 | We commit to keeping the breaking changes minimal so you can upgrade `react-scripts` painlessly. 114 | 115 | ## Sending Feedback 116 | 117 | We are always open to [your feedback](https://github.com/facebookincubator/create-react-app/issues). 118 | 119 | ## Folder Structure 120 | 121 | After creation, your project should look like this: 122 | 123 | ``` 124 | my-app/ 125 | README.md 126 | node_modules/ 127 | package.json 128 | public/ 129 | index.html 130 | favicon.ico 131 | src/ 132 | App.css 133 | App.js 134 | App.test.js 135 | index.css 136 | index.js 137 | logo.svg 138 | ``` 139 | 140 | For the project to build, **these files must exist with exact filenames**: 141 | 142 | * `public/index.html` is the page template; 143 | * `src/index.js` is the JavaScript entry point. 144 | 145 | You can delete or rename the other files. 146 | 147 | You may create subdirectories inside `src`. For faster rebuilds, only files inside `src` are processed by Webpack.<br> 148 | You need to **put any JS and CSS files inside `src`**, otherwise Webpack won’t see them. 149 | 150 | Only files inside `public` can be used from `public/index.html`.<br> 151 | Read instructions below for using assets from JavaScript and HTML. 152 | 153 | You can, however, create more top-level directories.<br> 154 | They will not be included in the production build so you can use them for things like documentation. 155 | 156 | ## Available Scripts 157 | 158 | In the project directory, you can run: 159 | 160 | ### `npm start` 161 | 162 | Runs the app in the development mode.<br> 163 | Open [http://localhost:3000](http://localhost:3000) to view it in the browser. 164 | 165 | The page will reload if you make edits.<br> 166 | You will also see any lint errors in the console. 167 | 168 | ### `npm test` 169 | 170 | Launches the test runner in the interactive watch mode.<br> 171 | See the section about [running tests](#running-tests) for more information. 172 | 173 | ### `npm run build` 174 | 175 | Builds the app for production to the `build` folder.<br> 176 | It correctly bundles React in production mode and optimizes the build for the best performance. 177 | 178 | The build is minified and the filenames include the hashes.<br> 179 | Your app is ready to be deployed! 180 | 181 | See the section about [deployment](#deployment) for more information. 182 | 183 | ### `npm run eject` 184 | 185 | **Note: this is a one-way operation. Once you `eject`, you can’t go back!** 186 | 187 | If you aren’t satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project. 188 | 189 | Instead, it will copy all the configuration files and the transitive dependencies (Webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own. 190 | 191 | You don’t have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it. 192 | 193 | ## Supported Language Features and Polyfills 194 | 195 | This project supports a superset of the latest JavaScript standard.<br> 196 | In addition to [ES6](https://github.com/lukehoban/es6features) syntax features, it also supports: 197 | 198 | * [Exponentiation Operator](https://github.com/rwaldron/exponentiation-operator) (ES2016). 199 | * [Async/await](https://github.com/tc39/ecmascript-asyncawait) (ES2017). 200 | * [Object Rest/Spread Properties](https://github.com/sebmarkbage/ecmascript-rest-spread) (stage 3 proposal). 201 | * [Dynamic import()](https://github.com/tc39/proposal-dynamic-import) (stage 3 proposal) 202 | * [Class Fields and Static Properties](https://github.com/tc39/proposal-class-public-fields) (part of stage 3 proposal). 203 | * [JSX](https://facebook.github.io/react/docs/introducing-jsx.html) and [Flow](https://flowtype.org/) syntax. 204 | 205 | Learn more about [different proposal stages](https://babeljs.io/docs/plugins/#presets-stage-x-experimental-presets-). 206 | 207 | While we recommend using experimental proposals with some caution, Facebook heavily uses these features in the product code, so we intend to provide [codemods](https://medium.com/@cpojer/effective-javascript-codemods-5a6686bb46fb) if any of these proposals change in the future. 208 | 209 | Note that **the project only includes a few ES6 [polyfills](https://en.wikipedia.org/wiki/Polyfill)**: 210 | 211 | * [`Object.assign()`](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign) via [`object-assign`](https://github.com/sindresorhus/object-assign). 212 | * [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise) via [`promise`](https://github.com/then/promise). 213 | * [`fetch()`](https://developer.mozilla.org/en/docs/Web/API/Fetch_API) via [`whatwg-fetch`](https://github.com/github/fetch). 214 | 215 | If you use any other ES6+ features that need **runtime support** (such as `Array.from()` or `Symbol`), make sure you are including the appropriate polyfills manually, or that the browsers you are targeting already support them. 216 | 217 | ## Syntax Highlighting in the Editor 218 | 219 | To configure the syntax highlighting in your favorite text editor, head to the [relevant Babel documentation page](https://babeljs.io/docs/editors) and follow the instructions. Some of the most popular editors are covered. 220 | 221 | ## Displaying Lint Output in the Editor 222 | 223 | >Note: this feature is available with `react-scripts@0.2.0` and higher.<br> 224 | >It also only works with npm 3 or higher. 225 | 226 | Some editors, including Sublime Text, Atom, and Visual Studio Code, provide plugins for ESLint. 227 | 228 | They are not required for linting. You should see the linter output right in your terminal as well as the browser console. However, if you prefer the lint results to appear right in your editor, there are some extra steps you can do. 229 | 230 | You would need to install an ESLint plugin for your editor first. Then, add a file called `.eslintrc` to the project root: 231 | 232 | ```js 233 | { 234 | "extends": "react-app" 235 | } 236 | ``` 237 | 238 | Now your editor should report the linting warnings. 239 | 240 | Note that even if you edit your `.eslintrc` file further, these changes will **only affect the editor integration**. They won’t affect the terminal and in-browser lint output. This is because Create React App intentionally provides a minimal set of rules that find common mistakes. 241 | 242 | If you want to enforce a coding style for your project, consider using [Prettier](https://github.com/jlongster/prettier) instead of ESLint style rules. 243 | 244 | ## Debugging in the Editor 245 | 246 | **This feature is currently only supported by [Visual Studio Code](https://code.visualstudio.com) and [WebStorm](https://www.jetbrains.com/webstorm/).** 247 | 248 | Visual Studio Code and WebStorm support debugging out of the box with Create React App. This enables you as a developer to write and debug your React code without leaving the editor, and most importantly it enables you to have a continuous development workflow, where context switching is minimal, as you don’t have to switch between tools. 249 | 250 | ### Visual Studio Code 251 | 252 | You would need to have the latest version of [VS Code](https://code.visualstudio.com) and VS Code [Chrome Debugger Extension](https://marketplace.visualstudio.com/items?itemName=msjsdiag.debugger-for-chrome) installed. 253 | 254 | Then add the block below to your `launch.json` file and put it inside the `.vscode` folder in your app’s root directory. 255 | 256 | ```json 257 | { 258 | "version": "0.2.0", 259 | "configurations": [{ 260 | "name": "Chrome", 261 | "type": "chrome", 262 | "request": "launch", 263 | "url": "http://localhost:3000", 264 | "webRoot": "${workspaceRoot}/src", 265 | "sourceMapPathOverrides": { 266 | "webpack:///src/*": "${webRoot}/*" 267 | } 268 | }] 269 | } 270 | ``` 271 | >Note: the URL may be different if you've made adjustments via the [HOST or PORT environment variables](#advanced-configuration). 272 | 273 | Start your app by running `npm start`, and start debugging in VS Code by pressing `F5` or by clicking the green debug icon. You can now write code, set breakpoints, make changes to the code, and debug your newly modified code—all from your editor. 274 | 275 | Having problems with VS Code Debugging? Please see their [troubleshooting guide](https://github.com/Microsoft/vscode-chrome-debug/blob/master/README.md#troubleshooting). 276 | 277 | ### WebStorm 278 | 279 | You would need to have [WebStorm](https://www.jetbrains.com/webstorm/) and [JetBrains IDE Support](https://chrome.google.com/webstore/detail/jetbrains-ide-support/hmhgeddbohgjknpmjagkdomcpobmllji) Chrome extension installed. 280 | 281 | In the WebStorm menu `Run` select `Edit Configurations...`. Then click `+` and select `JavaScript Debug`. Paste `http://localhost:3000` into the URL field and save the configuration. 282 | 283 | >Note: the URL may be different if you've made adjustments via the [HOST or PORT environment variables](#advanced-configuration). 284 | 285 | Start your app by running `npm start`, then press `^D` on macOS or `F9` on Windows and Linux or click the green debug icon to start debugging in WebStorm. 286 | 287 | The same way you can debug your application in IntelliJ IDEA Ultimate, PhpStorm, PyCharm Pro, and RubyMine. 288 | 289 | ## Formatting Code Automatically 290 | 291 | Prettier is an opinionated code formatter with support for JavaScript, CSS and JSON. With Prettier you can format the code you write automatically to ensure a code style within your project. See the [Prettier's GitHub page](https://github.com/prettier/prettier) for more information, and look at this [page to see it in action](https://prettier.github.io/prettier/). 292 | 293 | To format our code whenever we make a commit in git, we need to install the following dependencies: 294 | 295 | ```sh 296 | npm install --save husky lint-staged prettier 297 | ``` 298 | 299 | Alternatively you may use `yarn`: 300 | 301 | ```sh 302 | yarn add husky lint-staged prettier 303 | ``` 304 | 305 | * `husky` makes it easy to use githooks as if they are npm scripts. 306 | * `lint-staged` allows us to run scripts on staged files in git. See this [blog post about lint-staged to learn more about it](https://medium.com/@okonetchnikov/make-linting-great-again-f3890e1ad6b8). 307 | * `prettier` is the JavaScript formatter we will run before commits. 308 | 309 | Now we can make sure every file is formatted correctly by adding a few lines to the `package.json` in the project root. 310 | 311 | Add the following line to `scripts` section: 312 | 313 | ```diff 314 | "scripts": { 315 | + "precommit": "lint-staged", 316 | "start": "react-scripts start", 317 | "build": "react-scripts build", 318 | ``` 319 | 320 | Next we add a 'lint-staged' field to the `package.json`, for example: 321 | 322 | ```diff 323 | "dependencies": { 324 | // ... 325 | }, 326 | + "lint-staged": { 327 | + "src/**/*.{js,jsx,json,css}": [ 328 | + "prettier --single-quote --write", 329 | + "git add" 330 | + ] 331 | + }, 332 | "scripts": { 333 | ``` 334 | 335 | Now, whenever you make a commit, Prettier will format the changed files automatically. You can also run `./node_modules/.bin/prettier --single-quote --write "src/**/*.{js,jsx}"` to format your entire project for the first time. 336 | 337 | Next you might want to integrate Prettier in your favorite editor. Read the section on [Editor Integration](https://github.com/prettier/prettier#editor-integration) on the Prettier GitHub page. 338 | 339 | ## Changing the Page `<title>` 340 | 341 | You can find the source HTML file in the `public` folder of the generated project. You may edit the `<title>` tag in it to change the title from “React App” to anything else. 342 | 343 | Note that normally you wouldn’t edit files in the `public` folder very often. For example, [adding a stylesheet](#adding-a-stylesheet) is done without touching the HTML. 344 | 345 | If you need to dynamically update the page title based on the content, you can use the browser [`document.title`](https://developer.mozilla.org/en-US/docs/Web/API/Document/title) API. For more complex scenarios when you want to change the title from React components, you can use [React Helmet](https://github.com/nfl/react-helmet), a third party library. 346 | 347 | If you use a custom server for your app in production and want to modify the title before it gets sent to the browser, you can follow advice in [this section](#generating-dynamic-meta-tags-on-the-server). Alternatively, you can pre-build each page as a static HTML file which then loads the JavaScript bundle, which is covered [here](#pre-rendering-into-static-html-files). 348 | 349 | ## Installing a Dependency 350 | 351 | The generated project includes React and ReactDOM as dependencies. It also includes a set of scripts used by Create React App as a development dependency. You may install other dependencies (for example, React Router) with `npm`: 352 | 353 | ```sh 354 | npm install --save react-router 355 | ``` 356 | 357 | Alternatively you may use `yarn`: 358 | 359 | ```sh 360 | yarn add react-router 361 | ``` 362 | 363 | This works for any library, not just `react-router`. 364 | 365 | ## Importing a Component 366 | 367 | This project setup supports ES6 modules thanks to Babel.<br> 368 | While you can still use `require()` and `module.exports`, we encourage you to use [`import` and `export`](http://exploringjs.com/es6/ch_modules.html) instead. 369 | 370 | For example: 371 | 372 | ### `Button.js` 373 | 374 | ```js 375 | import React, { Component } from 'react'; 376 | 377 | class Button extends Component { 378 | render() { 379 | // ... 380 | } 381 | } 382 | 383 | export default Button; // Don’t forget to use export default! 384 | ``` 385 | 386 | ### `DangerButton.js` 387 | 388 | 389 | ```js 390 | import React, { Component } from 'react'; 391 | import Button from './Button'; // Import a component from another file 392 | 393 | class DangerButton extends Component { 394 | render() { 395 | return <Button color="red" />; 396 | } 397 | } 398 | 399 | export default DangerButton; 400 | ``` 401 | 402 | Be aware of the [difference between default and named exports](http://stackoverflow.com/questions/36795819/react-native-es-6-when-should-i-use-curly-braces-for-import/36796281#36796281). It is a common source of mistakes. 403 | 404 | We suggest that you stick to using default imports and exports when a module only exports a single thing (for example, a component). That’s what you get when you use `export default Button` and `import Button from './Button'`. 405 | 406 | Named exports are useful for utility modules that export several functions. A module may have at most one default export and as many named exports as you like. 407 | 408 | Learn more about ES6 modules: 409 | 410 | * [When to use the curly braces?](http://stackoverflow.com/questions/36795819/react-native-es-6-when-should-i-use-curly-braces-for-import/36796281#36796281) 411 | * [Exploring ES6: Modules](http://exploringjs.com/es6/ch_modules.html) 412 | * [Understanding ES6: Modules](https://leanpub.com/understandinges6/read#leanpub-auto-encapsulating-code-with-modules) 413 | 414 | ## Code Splitting 415 | 416 | Instead of downloading the entire app before users can use it, code splitting allows you to split your code into small chunks which you can then load on demand. 417 | 418 | This project setup supports code splitting via [dynamic `import()`](http://2ality.com/2017/01/import-operator.html#loading-code-on-demand). Its [proposal](https://github.com/tc39/proposal-dynamic-import) is in stage 3. The `import()` function-like form takes the module name as an argument and returns a [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise) which always resolves to the namespace object of the module. 419 | 420 | Here is an example: 421 | 422 | ### `moduleA.js` 423 | 424 | ```js 425 | const moduleA = 'Hello'; 426 | 427 | export { moduleA }; 428 | ``` 429 | ### `App.js` 430 | 431 | ```js 432 | import React, { Component } from 'react'; 433 | 434 | class App extends Component { 435 | handleClick = () => { 436 | import('./moduleA') 437 | .then(({ moduleA }) => { 438 | // Use moduleA 439 | }) 440 | .catch(err => { 441 | // Handle failure 442 | }); 443 | }; 444 | 445 | render() { 446 | return ( 447 | <div> 448 | <button onClick={this.handleClick}>Load</button> 449 | </div> 450 | ); 451 | } 452 | } 453 | 454 | export default App; 455 | ``` 456 | 457 | This will make `moduleA.js` and all its unique dependencies as a separate chunk that only loads after the user clicks the 'Load' button. 458 | 459 | You can also use it with `async` / `await` syntax if you prefer it. 460 | 461 | ### With React Router 462 | 463 | If you are using React Router check out [this tutorial](http://serverless-stack.com/chapters/code-splitting-in-create-react-app.html) on how to use code splitting with it. You can find the companion GitHub repository [here](https://github.com/AnomalyInnovations/serverless-stack-demo-client/tree/code-splitting-in-create-react-app). 464 | 465 | ## Adding a Stylesheet 466 | 467 | This project setup uses [Webpack](https://webpack.js.org/) for handling all assets. Webpack offers a custom way of “extending” the concept of `import` beyond JavaScript. To express that a JavaScript file depends on a CSS file, you need to **import the CSS from the JavaScript file**: 468 | 469 | ### `Button.css` 470 | 471 | ```css 472 | .Button { 473 | padding: 20px; 474 | } 475 | ``` 476 | 477 | ### `Button.js` 478 | 479 | ```js 480 | import React, { Component } from 'react'; 481 | import './Button.css'; // Tell Webpack that Button.js uses these styles 482 | 483 | class Button extends Component { 484 | render() { 485 | // You can use them as regular CSS styles 486 | return <div className="Button" />; 487 | } 488 | } 489 | ``` 490 | 491 | **This is not required for React** but many people find this feature convenient. You can read about the benefits of this approach [here](https://medium.com/seek-ui-engineering/block-element-modifying-your-javascript-components-d7f99fcab52b). However you should be aware that this makes your code less portable to other build tools and environments than Webpack. 492 | 493 | In development, expressing dependencies this way allows your styles to be reloaded on the fly as you edit them. In production, all CSS files will be concatenated into a single minified `.css` file in the build output. 494 | 495 | If you are concerned about using Webpack-specific semantics, you can put all your CSS right into `src/index.css`. It would still be imported from `src/index.js`, but you could always remove that import if you later migrate to a different build tool. 496 | 497 | ## Post-Processing CSS 498 | 499 | This project setup minifies your CSS and adds vendor prefixes to it automatically through [Autoprefixer](https://github.com/postcss/autoprefixer) so you don’t need to worry about it. 500 | 501 | For example, this: 502 | 503 | ```css 504 | .App { 505 | display: flex; 506 | flex-direction: row; 507 | align-items: center; 508 | } 509 | ``` 510 | 511 | becomes this: 512 | 513 | ```css 514 | .App { 515 | display: -webkit-box; 516 | display: -ms-flexbox; 517 | display: flex; 518 | -webkit-box-orient: horizontal; 519 | -webkit-box-direction: normal; 520 | -ms-flex-direction: row; 521 | flex-direction: row; 522 | -webkit-box-align: center; 523 | -ms-flex-align: center; 524 | align-items: center; 525 | } 526 | ``` 527 | 528 | If you need to disable autoprefixing for some reason, [follow this section](https://github.com/postcss/autoprefixer#disabling). 529 | 530 | ## Adding a CSS Preprocessor (Sass, Less etc.) 531 | 532 | Generally, we recommend that you don’t reuse the same CSS classes across different components. For example, instead of using a `.Button` CSS class in `<AcceptButton>` and `<RejectButton>` components, we recommend creating a `<Button>` component with its own `.Button` styles, that both `<AcceptButton>` and `<RejectButton>` can render (but [not inherit](https://facebook.github.io/react/docs/composition-vs-inheritance.html)). 533 | 534 | Following this rule often makes CSS preprocessors less useful, as features like mixins and nesting are replaced by component composition. You can, however, integrate a CSS preprocessor if you find it valuable. In this walkthrough, we will be using Sass, but you can also use Less, or another alternative. 535 | 536 | First, let’s install the command-line interface for Sass: 537 | 538 | ```sh 539 | npm install --save node-sass-chokidar 540 | ``` 541 | 542 | Alternatively you may use `yarn`: 543 | 544 | ```sh 545 | yarn add node-sass-chokidar 546 | ``` 547 | 548 | Then in `package.json`, add the following lines to `scripts`: 549 | 550 | ```diff 551 | "scripts": { 552 | + "build-css": "node-sass-chokidar src/ -o src/", 553 | + "watch-css": "npm run build-css && node-sass-chokidar src/ -o src/ --watch --recursive", 554 | "start": "react-scripts start", 555 | "build": "react-scripts build", 556 | "test": "react-scripts test --env=jsdom", 557 | ``` 558 | 559 | >Note: To use a different preprocessor, replace `build-css` and `watch-css` commands according to your preprocessor’s documentation. 560 | 561 | Now you can rename `src/App.css` to `src/App.scss` and run `npm run watch-css`. The watcher will find every Sass file in `src` subdirectories, and create a corresponding CSS file next to it, in our case overwriting `src/App.css`. Since `src/App.js` still imports `src/App.css`, the styles become a part of your application. You can now edit `src/App.scss`, and `src/App.css` will be regenerated. 562 | 563 | To share variables between Sass files, you can use Sass imports. For example, `src/App.scss` and other component style files could include `@import "./shared.scss";` with variable definitions. 564 | 565 | To enable importing files without using relative paths, you can add the `--include-path` option to the command in `package.json`. 566 | 567 | ``` 568 | "build-css": "node-sass-chokidar --include-path ./src --include-path ./node_modules src/ -o src/", 569 | "watch-css": "npm run build-css && node-sass-chokidar --include-path ./src --include-path ./node_modules src/ -o src/ --watch --recursive", 570 | ``` 571 | 572 | This will allow you to do imports like 573 | 574 | ```scss 575 | @import 'styles/_colors.scss'; // assuming a styles directory under src/ 576 | @import 'nprogress/nprogress'; // importing a css file from the nprogress node module 577 | ``` 578 | 579 | At this point you might want to remove all CSS files from the source control, and add `src/**/*.css` to your `.gitignore` file. It is generally a good practice to keep the build products outside of the source control. 580 | 581 | As a final step, you may find it convenient to run `watch-css` automatically with `npm start`, and run `build-css` as a part of `npm run build`. You can use the `&&` operator to execute two scripts sequentially. However, there is no cross-platform way to run two scripts in parallel, so we will install a package for this: 582 | 583 | ```sh 584 | npm install --save npm-run-all 585 | ``` 586 | 587 | Alternatively you may use `yarn`: 588 | 589 | ```sh 590 | yarn add npm-run-all 591 | ``` 592 | 593 | Then we can change `start` and `build` scripts to include the CSS preprocessor commands: 594 | 595 | ```diff 596 | "scripts": { 597 | "build-css": "node-sass-chokidar src/ -o src/", 598 | "watch-css": "npm run build-css && node-sass-chokidar src/ -o src/ --watch --recursive", 599 | - "start": "react-scripts start", 600 | - "build": "react-scripts build", 601 | + "start-js": "react-scripts start", 602 | + "start": "npm-run-all -p watch-css start-js", 603 | + "build-js": "react-scripts build", 604 | + "build": "npm-run-all build-css build-js", 605 | "test": "react-scripts test --env=jsdom", 606 | "eject": "react-scripts eject" 607 | } 608 | ``` 609 | 610 | Now running `npm start` and `npm run build` also builds Sass files. 611 | 612 | **Why `node-sass-chokidar`?** 613 | 614 | `node-sass` has been reported as having the following issues: 615 | 616 | - `node-sass --watch` has been reported to have *performance issues* in certain conditions when used in a virtual machine or with docker. 617 | 618 | - Infinite styles compiling [#1939](https://github.com/facebookincubator/create-react-app/issues/1939) 619 | 620 | - `node-sass` has been reported as having issues with detecting new files in a directory [#1891](https://github.com/sass/node-sass/issues/1891) 621 | 622 | `node-sass-chokidar` is used here as it addresses these issues. 623 | 624 | ## Adding Images, Fonts, and Files 625 | 626 | With Webpack, using static assets like images and fonts works similarly to CSS. 627 | 628 | You can **`import` a file right in a JavaScript module**. This tells Webpack to include that file in the bundle. Unlike CSS imports, importing a file gives you a string value. This value is the final path you can reference in your code, e.g. as the `src` attribute of an image or the `href` of a link to a PDF. 629 | 630 | To reduce the number of requests to the server, importing images that are less than 10,000 bytes returns a [data URI](https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs) instead of a path. This applies to the following file extensions: bmp, gif, jpg, jpeg, and png. SVG files are excluded due to [#1153](https://github.com/facebookincubator/create-react-app/issues/1153). 631 | 632 | Here is an example: 633 | 634 | ```js 635 | import React from 'react'; 636 | import logo from './logo.png'; // Tell Webpack this JS file uses this image 637 | 638 | console.log(logo); // /logo.84287d09.png 639 | 640 | function Header() { 641 | // Import result is the URL of your image 642 | return <img src={logo} alt="Logo" />; 643 | } 644 | 645 | export default Header; 646 | ``` 647 | 648 | This ensures that when the project is built, Webpack will correctly move the images into the build folder, and provide us with correct paths. 649 | 650 | This works in CSS too: 651 | 652 | ```css 653 | .Logo { 654 | background-image: url(./logo.png); 655 | } 656 | ``` 657 | 658 | Webpack finds all relative module references in CSS (they start with `./`) and replaces them with the final paths from the compiled bundle. If you make a typo or accidentally delete an important file, you will see a compilation error, just like when you import a non-existent JavaScript module. The final filenames in the compiled bundle are generated by Webpack from content hashes. If the file content changes in the future, Webpack will give it a different name in production so you don’t need to worry about long-term caching of assets. 659 | 660 | Please be advised that this is also a custom feature of Webpack. 661 | 662 | **It is not required for React** but many people enjoy it (and React Native uses a similar mechanism for images).<br> 663 | An alternative way of handling static assets is described in the next section. 664 | 665 | ## Using the `public` Folder 666 | 667 | >Note: this feature is available with `react-scripts@0.5.0` and higher. 668 | 669 | ### Changing the HTML 670 | 671 | The `public` folder contains the HTML file so you can tweak it, for example, to [set the page title](#changing-the-page-title). 672 | The `<script>` tag with the compiled code will be added to it automatically during the build process. 673 | 674 | ### Adding Assets Outside of the Module System 675 | 676 | You can also add other assets to the `public` folder. 677 | 678 | Note that we normally encourage you to `import` assets in JavaScript files instead. 679 | For example, see the sections on [adding a stylesheet](#adding-a-stylesheet) and [adding images and fonts](#adding-images-fonts-and-files). 680 | This mechanism provides a number of benefits: 681 | 682 | * Scripts and stylesheets get minified and bundled together to avoid extra network requests. 683 | * Missing files cause compilation errors instead of 404 errors for your users. 684 | * Result filenames include content hashes so you don’t need to worry about browsers caching their old versions. 685 | 686 | However there is an **escape hatch** that you can use to add an asset outside of the module system. 687 | 688 | If you put a file into the `public` folder, it will **not** be processed by Webpack. Instead it will be copied into the build folder untouched. To reference assets in the `public` folder, you need to use a special variable called `PUBLIC_URL`. 689 | 690 | Inside `index.html`, you can use it like this: 691 | 692 | ```html 693 | <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico"> 694 | ``` 695 | 696 | Only files inside the `public` folder will be accessible by `%PUBLIC_URL%` prefix. If you need to use a file from `src` or `node_modules`, you’ll have to copy it there to explicitly specify your intention to make this file a part of the build. 697 | 698 | When you run `npm run build`, Create React App will substitute `%PUBLIC_URL%` with a correct absolute path so your project works even if you use client-side routing or host it at a non-root URL. 699 | 700 | In JavaScript code, you can use `process.env.PUBLIC_URL` for similar purposes: 701 | 702 | ```js 703 | render() { 704 | // Note: this is an escape hatch and should be used sparingly! 705 | // Normally we recommend using `import` for getting asset URLs 706 | // as described in “Adding Images and Fonts” above this section. 707 | return <img src={process.env.PUBLIC_URL + '/img/logo.png'} />; 708 | } 709 | ``` 710 | 711 | Keep in mind the downsides of this approach: 712 | 713 | * None of the files in `public` folder get post-processed or minified. 714 | * Missing files will not be called at compilation time, and will cause 404 errors for your users. 715 | * Result filenames won’t include content hashes so you’ll need to add query arguments or rename them every time they change. 716 | 717 | ### When to Use the `public` Folder 718 | 719 | Normally we recommend importing [stylesheets](#adding-a-stylesheet), [images, and fonts](#adding-images-fonts-and-files) from JavaScript. 720 | The `public` folder is useful as a workaround for a number of less common cases: 721 | 722 | * You need a file with a specific name in the build output, such as [`manifest.webmanifest`](https://developer.mozilla.org/en-US/docs/Web/Manifest). 723 | * You have thousands of images and need to dynamically reference their paths. 724 | * You want to include a small script like [`pace.js`](http://github.hubspot.com/pace/docs/welcome/) outside of the bundled code. 725 | * Some library may be incompatible with Webpack and you have no other option but to include it as a `<script>` tag. 726 | 727 | Note that if you add a `<script>` that declares global variables, you also need to read the next section on using them. 728 | 729 | ## Using Global Variables 730 | 731 | When you include a script in the HTML file that defines global variables and try to use one of these variables in the code, the linter will complain because it cannot see the definition of the variable. 732 | 733 | You can avoid this by reading the global variable explicitly from the `window` object, for example: 734 | 735 | ```js 736 | const $ = window.$; 737 | ``` 738 | 739 | This makes it obvious you are using a global variable intentionally rather than because of a typo. 740 | 741 | Alternatively, you can force the linter to ignore any line by adding `// eslint-disable-line` after it. 742 | 743 | ## Adding Bootstrap 744 | 745 | You don’t have to use [Reactstrap](https://reactstrap.github.io/) together with React but it is a popular library for integrating Bootstrap with React apps. If you need it, you can integrate it with Create React App by following these steps: 746 | 747 | Install Reactstrap and Bootstrap from npm. React Bootstrap does not include Bootstrap CSS so this needs to be installed as well: 748 | 749 | ```sh 750 | npm install --save reactstrap bootstrap@4 751 | ``` 752 | 753 | Alternatively you may use `yarn`: 754 | 755 | ```sh 756 | yarn add reactstrap bootstrap@4 757 | ``` 758 | 759 | Import Bootstrap CSS and optionally Bootstrap theme CSS in the beginning of your ```src/index.js``` file: 760 | 761 | ```js 762 | import 'bootstrap/dist/css/bootstrap.css'; 763 | // Put any other imports below so that CSS from your 764 | // components takes precedence over default styles. 765 | ``` 766 | 767 | Import required React Bootstrap components within ```src/App.js``` file or your custom component files: 768 | 769 | ```js 770 | import { Navbar, Button } from 'reactstrap'; 771 | ``` 772 | 773 | Now you are ready to use the imported React Bootstrap components within your component hierarchy defined in the render method. Here is an example [`App.js`](https://gist.githubusercontent.com/gaearon/85d8c067f6af1e56277c82d19fd4da7b/raw/6158dd991b67284e9fc8d70b9d973efe87659d72/App.js) redone using React Bootstrap. 774 | 775 | ### Using a Custom Theme 776 | 777 | Sometimes you might need to tweak the visual styles of Bootstrap (or equivalent package).<br> 778 | We suggest the following approach: 779 | 780 | * Create a new package that depends on the package you wish to customize, e.g. Bootstrap. 781 | * Add the necessary build steps to tweak the theme, and publish your package on npm. 782 | * Install your own theme npm package as a dependency of your app. 783 | 784 | Here is an example of adding a [customized Bootstrap](https://medium.com/@tacomanator/customizing-create-react-app-aa9ffb88165) that follows these steps. 785 | 786 | ## Adding Flow 787 | 788 | Flow is a static type checker that helps you write code with fewer bugs. Check out this [introduction to using static types in JavaScript](https://medium.com/@preethikasireddy/why-use-static-types-in-javascript-part-1-8382da1e0adb) if you are new to this concept. 789 | 790 | Recent versions of [Flow](http://flowtype.org/) work with Create React App projects out of the box. 791 | 792 | To add Flow to a Create React App project, follow these steps: 793 | 794 | 1. Run `npm install --save flow-bin` (or `yarn add flow-bin`). 795 | 2. Add `"flow": "flow"` to the `scripts` section of your `package.json`. 796 | 3. Run `npm run flow init` (or `yarn flow init`) to create a [`.flowconfig` file](https://flowtype.org/docs/advanced-configuration.html) in the root directory. 797 | 4. Add `// @flow` to any files you want to type check (for example, to `src/App.js`). 798 | 799 | Now you can run `npm run flow` (or `yarn flow`) to check the files for type errors. 800 | You can optionally use an IDE like [Nuclide](https://nuclide.io/docs/languages/flow/) for a better integrated experience. 801 | In the future we plan to integrate it into Create React App even more closely. 802 | 803 | To learn more about Flow, check out [its documentation](https://flowtype.org/). 804 | 805 | ## Adding Custom Environment Variables 806 | 807 | >Note: this feature is available with `react-scripts@0.2.3` and higher. 808 | 809 | Your project can consume variables declared in your environment as if they were declared locally in your JS files. By 810 | default you will have `NODE_ENV` defined for you, and any other environment variables starting with 811 | `REACT_APP_`. 812 | 813 | **The environment variables are embedded during the build time**. Since Create React App produces a static HTML/CSS/JS bundle, it can’t possibly read them at runtime. To read them at runtime, you would need to load HTML into memory on the server and replace placeholders in runtime, just like [described here](#injecting-data-from-the-server-into-the-page). Alternatively you can rebuild the app on the server anytime you change them. 814 | 815 | >Note: You must create custom environment variables beginning with `REACT_APP_`. Any other variables except `NODE_ENV` will be ignored to avoid accidentally [exposing a private key on the machine that could have the same name](https://github.com/facebookincubator/create-react-app/issues/865#issuecomment-252199527). Changing any environment variables will require you to restart the development server if it is running. 816 | 817 | These environment variables will be defined for you on `process.env`. For example, having an environment 818 | variable named `REACT_APP_SECRET_CODE` will be exposed in your JS as `process.env.REACT_APP_SECRET_CODE`. 819 | 820 | There is also a special built-in environment variable called `NODE_ENV`. You can read it from `process.env.NODE_ENV`. When you run `npm start`, it is always equal to `'development'`, when you run `npm test` it is always equal to `'test'`, and when you run `npm run build` to make a production bundle, it is always equal to `'production'`. **You cannot override `NODE_ENV` manually.** This prevents developers from accidentally deploying a slow development build to production. 821 | 822 | These environment variables can be useful for displaying information conditionally based on where the project is 823 | deployed or consuming sensitive data that lives outside of version control. 824 | 825 | First, you need to have environment variables defined. For example, let’s say you wanted to consume a secret defined 826 | in the environment inside a `<form>`: 827 | 828 | ```jsx 829 | render() { 830 | return ( 831 | <div> 832 | <small>You are running this application in <b>{process.env.NODE_ENV}</b> mode.</small> 833 | <form> 834 | <input type="hidden" defaultValue={process.env.REACT_APP_SECRET_CODE} /> 835 | </form> 836 | </div> 837 | ); 838 | } 839 | ``` 840 | 841 | During the build, `process.env.REACT_APP_SECRET_CODE` will be replaced with the current value of the `REACT_APP_SECRET_CODE` environment variable. Remember that the `NODE_ENV` variable will be set for you automatically. 842 | 843 | When you load the app in the browser and inspect the `<input>`, you will see its value set to `abcdef`, and the bold text will show the environment provided when using `npm start`: 844 | 845 | ```html 846 | <div> 847 | <small>You are running this application in <b>development</b> mode.</small> 848 | <form> 849 | <input type="hidden" value="abcdef" /> 850 | </form> 851 | </div> 852 | ``` 853 | 854 | The above form is looking for a variable called `REACT_APP_SECRET_CODE` from the environment. In order to consume this 855 | value, we need to have it defined in the environment. This can be done using two ways: either in your shell or in 856 | a `.env` file. Both of these ways are described in the next few sections. 857 | 858 | Having access to the `NODE_ENV` is also useful for performing actions conditionally: 859 | 860 | ```js 861 | if (process.env.NODE_ENV !== 'production') { 862 | analytics.disable(); 863 | } 864 | ``` 865 | 866 | When you compile the app with `npm run build`, the minification step will strip out this condition, and the resulting bundle will be smaller. 867 | 868 | ### Referencing Environment Variables in the HTML 869 | 870 | >Note: this feature is available with `react-scripts@0.9.0` and higher. 871 | 872 | You can also access the environment variables starting with `REACT_APP_` in the `public/index.html`. For example: 873 | 874 | ```html 875 | <title>%REACT_APP_WEBSITE_NAME% 876 | ``` 877 | 878 | Note that the caveats from the above section apply: 879 | 880 | * Apart from a few built-in variables (`NODE_ENV` and `PUBLIC_URL`), variable names must start with `REACT_APP_` to work. 881 | * The environment variables are injected at build time. If you need to inject them at runtime, [follow this approach instead](#generating-dynamic-meta-tags-on-the-server). 882 | 883 | ### Adding Temporary Environment Variables In Your Shell 884 | 885 | Defining environment variables can vary between OSes. It’s also important to know that this manner is temporary for the 886 | life of the shell session. 887 | 888 | #### Windows (cmd.exe) 889 | 890 | ```cmd 891 | set REACT_APP_SECRET_CODE=abcdef&&npm start 892 | ``` 893 | 894 | (Note: the lack of whitespace is intentional.) 895 | 896 | #### Linux, macOS (Bash) 897 | 898 | ```bash 899 | REACT_APP_SECRET_CODE=abcdef npm start 900 | ``` 901 | 902 | ### Adding Development Environment Variables In `.env` 903 | 904 | >Note: this feature is available with `react-scripts@0.5.0` and higher. 905 | 906 | To define permanent environment variables, create a file called `.env` in the root of your project: 907 | 908 | ``` 909 | REACT_APP_SECRET_CODE=abcdef 910 | ``` 911 | 912 | `.env` files **should be** checked into source control (with the exclusion of `.env*.local`). 913 | 914 | #### What other `.env` files can be used? 915 | 916 | >Note: this feature is **available with `react-scripts@1.0.0` and higher**. 917 | 918 | * `.env`: Default. 919 | * `.env.local`: Local overrides. **This file is loaded for all environments except test.** 920 | * `.env.development`, `.env.test`, `.env.production`: Environment-specific settings. 921 | * `.env.development.local`, `.env.test.local`, `.env.production.local`: Local overrides of environment-specific settings. 922 | 923 | Files on the left have more priority than files on the right: 924 | 925 | * `npm start`: `.env.development.local`, `.env.development`, `.env.local`, `.env` 926 | * `npm run build`: `.env.production.local`, `.env.production`, `.env.local`, `.env` 927 | * `npm test`: `.env.test.local`, `.env.test`, `.env` (note `.env.local` is missing) 928 | 929 | These variables will act as the defaults if the machine does not explicitly set them.
930 | Please refer to the [dotenv documentation](https://github.com/motdotla/dotenv) for more details. 931 | 932 | >Note: If you are defining environment variables for development, your CI and/or hosting platform will most likely need 933 | these defined as well. Consult their documentation how to do this. For example, see the documentation for [Travis CI](https://docs.travis-ci.com/user/environment-variables/) or [Heroku](https://devcenter.heroku.com/articles/config-vars). 934 | 935 | ## Can I Use Decorators? 936 | 937 | Many popular libraries use [decorators](https://medium.com/google-developers/exploring-es7-decorators-76ecb65fb841) in their documentation.
938 | Create React App doesn’t support decorator syntax at the moment because: 939 | 940 | * It is an experimental proposal and is subject to change. 941 | * The current specification version is not officially supported by Babel. 942 | * If the specification changes, we won’t be able to write a codemod because we don’t use them internally at Facebook. 943 | 944 | However in many cases you can rewrite decorator-based code without decorators just as fine.
945 | Please refer to these two threads for reference: 946 | 947 | * [#214](https://github.com/facebookincubator/create-react-app/issues/214) 948 | * [#411](https://github.com/facebookincubator/create-react-app/issues/411) 949 | 950 | Create React App will add decorator support when the specification advances to a stable stage. 951 | 952 | ## Integrating with an API Backend 953 | 954 | These tutorials will help you to integrate your app with an API backend running on another port, 955 | using `fetch()` to access it. 956 | 957 | ### Node 958 | Check out [this tutorial](https://www.fullstackreact.com/articles/using-create-react-app-with-a-server/). 959 | You can find the companion GitHub repository [here](https://github.com/fullstackreact/food-lookup-demo). 960 | 961 | ### Ruby on Rails 962 | 963 | Check out [this tutorial](https://www.fullstackreact.com/articles/how-to-get-create-react-app-to-work-with-your-rails-api/). 964 | You can find the companion GitHub repository [here](https://github.com/fullstackreact/food-lookup-demo-rails). 965 | 966 | ## Proxying API Requests in Development 967 | 968 | >Note: this feature is available with `react-scripts@0.2.3` and higher. 969 | 970 | People often serve the front-end React app from the same host and port as their backend implementation.
971 | For example, a production setup might look like this after the app is deployed: 972 | 973 | ``` 974 | / - static server returns index.html with React app 975 | /todos - static server returns index.html with React app 976 | /api/todos - server handles any /api/* requests using the backend implementation 977 | ``` 978 | 979 | Such setup is **not** required. However, if you **do** have a setup like this, it is convenient to write requests like `fetch('/api/todos')` without worrying about redirecting them to another host or port during development. 980 | 981 | To tell the development server to proxy any unknown requests to your API server in development, add a `proxy` field to your `package.json`, for example: 982 | 983 | ```js 984 | "proxy": "http://localhost:4000", 985 | ``` 986 | 987 | This way, when you `fetch('/api/todos')` in development, the development server will recognize that it’s not a static asset, and will proxy your request to `http://localhost:4000/api/todos` as a fallback. The development server will **only** attempt to send requests without `text/html` in its `Accept` header to the proxy. 988 | 989 | Conveniently, this avoids [CORS issues](http://stackoverflow.com/questions/21854516/understanding-ajax-cors-and-security-considerations) and error messages like this in development: 990 | 991 | ``` 992 | Fetch API cannot load http://localhost:4000/api/todos. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' is therefore not allowed access. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled. 993 | ``` 994 | 995 | Keep in mind that `proxy` only has effect in development (with `npm start`), and it is up to you to ensure that URLs like `/api/todos` point to the right thing in production. You don’t have to use the `/api` prefix. Any unrecognized request without a `text/html` accept header will be redirected to the specified `proxy`. 996 | 997 | The `proxy` option supports HTTP, HTTPS and WebSocket connections.
998 | If the `proxy` option is **not** flexible enough for you, alternatively you can: 999 | 1000 | * [Configure the proxy yourself](#configuring-the-proxy-manually) 1001 | * Enable CORS on your server ([here’s how to do it for Express](http://enable-cors.org/server_expressjs.html)). 1002 | * Use [environment variables](#adding-custom-environment-variables) to inject the right server host and port into your app. 1003 | 1004 | ### "Invalid Host Header" Errors After Configuring Proxy 1005 | 1006 | When you enable the `proxy` option, you opt into a more strict set of host checks. This is necessary because leaving the backend open to remote hosts makes your computer vulnerable to DNS rebinding attacks. The issue is explained in [this article](https://medium.com/webpack/webpack-dev-server-middleware-security-issues-1489d950874a) and [this issue](https://github.com/webpack/webpack-dev-server/issues/887). 1007 | 1008 | This shouldn’t affect you when developing on `localhost`, but if you develop remotely like [described here](https://github.com/facebookincubator/create-react-app/issues/2271), you will see this error in the browser after enabling the `proxy` option: 1009 | 1010 | >Invalid Host header 1011 | 1012 | To work around it, you can specify your public development host in a file called `.env.development` in the root of your project: 1013 | 1014 | ``` 1015 | HOST=mypublicdevhost.com 1016 | ``` 1017 | 1018 | If you restart the development server now and load the app from the specified host, it should work. 1019 | 1020 | If you are still having issues or if you’re using a more exotic environment like a cloud editor, you can bypass the host check completely by adding a line to `.env.development.local`. **Note that this is dangerous and exposes your machine to remote code execution from malicious websites:** 1021 | 1022 | ``` 1023 | # NOTE: THIS IS DANGEROUS! 1024 | # It exposes your machine to attacks from the websites you visit. 1025 | DANGEROUSLY_DISABLE_HOST_CHECK=true 1026 | ``` 1027 | 1028 | We don’t recommend this approach. 1029 | 1030 | ### Configuring the Proxy Manually 1031 | 1032 | >Note: this feature is available with `react-scripts@1.0.0` and higher. 1033 | 1034 | If the `proxy` option is **not** flexible enough for you, you can specify an object in the following form (in `package.json`).
1035 | You may also specify any configuration value [`http-proxy-middleware`](https://github.com/chimurai/http-proxy-middleware#options) or [`http-proxy`](https://github.com/nodejitsu/node-http-proxy#options) supports. 1036 | ```js 1037 | { 1038 | // ... 1039 | "proxy": { 1040 | "/api": { 1041 | "target": "", 1042 | "ws": true 1043 | // ... 1044 | } 1045 | } 1046 | // ... 1047 | } 1048 | ``` 1049 | 1050 | All requests matching this path will be proxies, no exceptions. This includes requests for `text/html`, which the standard `proxy` option does not proxy. 1051 | 1052 | If you need to specify multiple proxies, you may do so by specifying additional entries. 1053 | Matches are regular expressions, so that you can use a regexp to match multiple paths. 1054 | ```js 1055 | { 1056 | // ... 1057 | "proxy": { 1058 | // Matches any request starting with /api 1059 | "/api": { 1060 | "target": "", 1061 | "ws": true 1062 | // ... 1063 | }, 1064 | // Matches any request starting with /foo 1065 | "/foo": { 1066 | "target": "", 1067 | "ssl": true, 1068 | "pathRewrite": { 1069 | "^/foo": "/foo/beta" 1070 | } 1071 | // ... 1072 | }, 1073 | // Matches /bar/abc.html but not /bar/sub/def.html 1074 | "/bar/[^/]*[.]html": { 1075 | "target": "", 1076 | // ... 1077 | }, 1078 | // Matches /baz/abc.html and /baz/sub/def.html 1079 | "/baz/.*/.*[.]html": { 1080 | "target": "" 1081 | // ... 1082 | } 1083 | } 1084 | // ... 1085 | } 1086 | ``` 1087 | 1088 | ### Configuring a WebSocket Proxy 1089 | 1090 | When setting up a WebSocket proxy, there are a some extra considerations to be aware of. 1091 | 1092 | If you’re using a WebSocket engine like [Socket.io](https://socket.io/), you must have a Socket.io server running that you can use as the proxy target. Socket.io will not work with a standard WebSocket server. Specifically, don't expect Socket.io to work with [the websocket.org echo test](http://websocket.org/echo.html). 1093 | 1094 | There’s some good documentation available for [setting up a Socket.io server](https://socket.io/docs/). 1095 | 1096 | Standard WebSockets **will** work with a standard WebSocket server as well as the websocket.org echo test. You can use libraries like [ws](https://github.com/websockets/ws) for the server, with [native WebSockets in the browser](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket). 1097 | 1098 | Either way, you can proxy WebSocket requests manually in `package.json`: 1099 | 1100 | ```js 1101 | { 1102 | // ... 1103 | "proxy": { 1104 | "/socket": { 1105 | // Your compatible WebSocket server 1106 | "target": "ws://", 1107 | // Tell http-proxy-middleware that this is a WebSocket proxy. 1108 | // Also allows you to proxy WebSocket requests without an additional HTTP request 1109 | // https://github.com/chimurai/http-proxy-middleware#external-websocket-upgrade 1110 | "ws": true 1111 | // ... 1112 | } 1113 | } 1114 | // ... 1115 | } 1116 | ``` 1117 | 1118 | ## Using HTTPS in Development 1119 | 1120 | >Note: this feature is available with `react-scripts@0.4.0` and higher. 1121 | 1122 | You may require the dev server to serve pages over HTTPS. One particular case where this could be useful is when using [the "proxy" feature](#proxying-api-requests-in-development) to proxy requests to an API server when that API server is itself serving HTTPS. 1123 | 1124 | To do this, set the `HTTPS` environment variable to `true`, then start the dev server as usual with `npm start`: 1125 | 1126 | #### Windows (cmd.exe) 1127 | 1128 | ```cmd 1129 | set HTTPS=true&&npm start 1130 | ``` 1131 | 1132 | (Note: the lack of whitespace is intentional.) 1133 | 1134 | #### Linux, macOS (Bash) 1135 | 1136 | ```bash 1137 | HTTPS=true npm start 1138 | ``` 1139 | 1140 | Note that the server will use a self-signed certificate, so your web browser will almost definitely display a warning upon accessing the page. 1141 | 1142 | ## Generating Dynamic `` Tags on the Server 1143 | 1144 | Since Create React App doesn’t support server rendering, you might be wondering how to make `` tags dynamic and reflect the current URL. To solve this, we recommend to add placeholders into the HTML, like this: 1145 | 1146 | ```html 1147 | 1148 | 1149 | 1150 | 1151 | 1152 | ``` 1153 | 1154 | Then, on the server, regardless of the backend you use, you can read `index.html` into memory and replace `__OG_TITLE__`, `__OG_DESCRIPTION__`, and any other placeholders with values depending on the current URL. Just make sure to sanitize and escape the interpolated values so that they are safe to embed into HTML! 1155 | 1156 | If you use a Node server, you can even share the route matching logic between the client and the server. However duplicating it also works fine in simple cases. 1157 | 1158 | ## Pre-Rendering into Static HTML Files 1159 | 1160 | If you’re hosting your `build` with a static hosting provider you can use [react-snapshot](https://www.npmjs.com/package/react-snapshot) or [react-snap](https://github.com/stereobooster/react-snap) to generate HTML pages for each route, or relative link, in your application. These pages will then seamlessly become active, or “hydrated”, when the JavaScript bundle has loaded. 1161 | 1162 | There are also opportunities to use this outside of static hosting, to take the pressure off the server when generating and caching routes. 1163 | 1164 | The primary benefit of pre-rendering is that you get the core content of each page _with_ the HTML payload—regardless of whether or not your JavaScript bundle successfully downloads. It also increases the likelihood that each route of your application will be picked up by search engines. 1165 | 1166 | You can read more about [zero-configuration pre-rendering (also called snapshotting) here](https://medium.com/superhighfives/an-almost-static-stack-6df0a2791319). 1167 | 1168 | ## Injecting Data from the Server into the Page 1169 | 1170 | Similarly to the previous section, you can leave some placeholders in the HTML that inject global variables, for example: 1171 | 1172 | ```js 1173 | 1174 | 1175 | 1176 | 1179 | ``` 1180 | 1181 | Then, on the server, you can replace `__SERVER_DATA__` with a JSON of real data right before sending the response. The client code can then read `window.SERVER_DATA` to use it. **Make sure to [sanitize the JSON before sending it to the client](https://medium.com/node-security/the-most-common-xss-vulnerability-in-react-js-applications-2bdffbcc1fa0) as it makes your app vulnerable to XSS attacks.** 1182 | 1183 | ## Running Tests 1184 | 1185 | >Note: this feature is available with `react-scripts@0.3.0` and higher.
1186 | >[Read the migration guide to learn how to enable it in older projects!](https://github.com/facebookincubator/create-react-app/blob/master/CHANGELOG.md#migrating-from-023-to-030) 1187 | 1188 | Create React App uses [Jest](https://facebook.github.io/jest/) as its test runner. To prepare for this integration, we did a [major revamp](https://facebook.github.io/jest/blog/2016/09/01/jest-15.html) of Jest so if you heard bad things about it years ago, give it another try. 1189 | 1190 | Jest is a Node-based runner. This means that the tests always run in a Node environment and not in a real browser. This lets us enable fast iteration speed and prevent flakiness. 1191 | 1192 | While Jest provides browser globals such as `window` thanks to [jsdom](https://github.com/tmpvar/jsdom), they are only approximations of the real browser behavior. Jest is intended to be used for unit tests of your logic and your components rather than the DOM quirks. 1193 | 1194 | We recommend that you use a separate tool for browser end-to-end tests if you need them. They are beyond the scope of Create React App. 1195 | 1196 | ### Filename Conventions 1197 | 1198 | Jest will look for test files with any of the following popular naming conventions: 1199 | 1200 | * Files with `.js` suffix in `__tests__` folders. 1201 | * Files with `.test.js` suffix. 1202 | * Files with `.spec.js` suffix. 1203 | 1204 | The `.test.js` / `.spec.js` files (or the `__tests__` folders) can be located at any depth under the `src` top level folder. 1205 | 1206 | We recommend to put the test files (or `__tests__` folders) next to the code they are testing so that relative imports appear shorter. For example, if `App.test.js` and `App.js` are in the same folder, the test just needs to `import App from './App'` instead of a long relative path. Colocation also helps find tests more quickly in larger projects. 1207 | 1208 | ### Command Line Interface 1209 | 1210 | When you run `npm test`, Jest will launch in the watch mode. Every time you save a file, it will re-run the tests, just like `npm start` recompiles the code. 1211 | 1212 | The watcher includes an interactive command-line interface with the ability to run all tests, or focus on a search pattern. It is designed this way so that you can keep it open and enjoy fast re-runs. You can learn the commands from the “Watch Usage” note that the watcher prints after every run: 1213 | 1214 | ![Jest watch mode](http://facebook.github.io/jest/img/blog/15-watch.gif) 1215 | 1216 | ### Version Control Integration 1217 | 1218 | By default, when you run `npm test`, Jest will only run the tests related to files changed since the last commit. This is an optimization designed to make your tests run fast regardless of how many tests you have. However it assumes that you don’t often commit the code that doesn’t pass the tests. 1219 | 1220 | Jest will always explicitly mention that it only ran tests related to the files changed since the last commit. You can also press `a` in the watch mode to force Jest to run all tests. 1221 | 1222 | Jest will always run all tests on a [continuous integration](#continuous-integration) server or if the project is not inside a Git or Mercurial repository. 1223 | 1224 | ### Writing Tests 1225 | 1226 | To create tests, add `it()` (or `test()`) blocks with the name of the test and its code. You may optionally wrap them in `describe()` blocks for logical grouping but this is neither required nor recommended. 1227 | 1228 | Jest provides a built-in `expect()` global function for making assertions. A basic test could look like this: 1229 | 1230 | ```js 1231 | import sum from './sum'; 1232 | 1233 | it('sums numbers', () => { 1234 | expect(sum(1, 2)).toEqual(3); 1235 | expect(sum(2, 2)).toEqual(4); 1236 | }); 1237 | ``` 1238 | 1239 | All `expect()` matchers supported by Jest are [extensively documented here](https://facebook.github.io/jest/docs/en/expect.html#content).
1240 | You can also use [`jest.fn()` and `expect(fn).toBeCalled()`](https://facebook.github.io/jest/docs/en/expect.html#tohavebeencalled) to create “spies” or mock functions. 1241 | 1242 | ### Testing Components 1243 | 1244 | There is a broad spectrum of component testing techniques. They range from a “smoke test” verifying that a component renders without throwing, to shallow rendering and testing some of the output, to full rendering and testing component lifecycle and state changes. 1245 | 1246 | Different projects choose different testing tradeoffs based on how often components change, and how much logic they contain. If you haven’t decided on a testing strategy yet, we recommend that you start with creating simple smoke tests for your components: 1247 | 1248 | ```js 1249 | import React from 'react'; 1250 | import ReactDOM from 'react-dom'; 1251 | import App from './App'; 1252 | 1253 | it('renders without crashing', () => { 1254 | const div = document.createElement('div'); 1255 | ReactDOM.render(, div); 1256 | }); 1257 | ``` 1258 | 1259 | This test mounts a component and makes sure that it didn’t throw during rendering. Tests like this provide a lot value with very little effort so they are great as a starting point, and this is the test you will find in `src/App.test.js`. 1260 | 1261 | When you encounter bugs caused by changing components, you will gain a deeper insight into which parts of them are worth testing in your application. This might be a good time to introduce more specific tests asserting specific expected output or behavior. 1262 | 1263 | If you’d like to test components in isolation from the child components they render, we recommend using [`shallow()` rendering API](http://airbnb.io/enzyme/docs/api/shallow.html) from [Enzyme](http://airbnb.io/enzyme/). To install it, run: 1264 | 1265 | ```sh 1266 | npm install --save enzyme enzyme-adapter-react-16 react-test-renderer 1267 | ``` 1268 | 1269 | Alternatively you may use `yarn`: 1270 | 1271 | ```sh 1272 | yarn add enzyme enzyme-adapter-react-16 react-test-renderer 1273 | ``` 1274 | 1275 | As of Enzyme 3, you will need to install Enzyme along with an Adapter corresponding to the version of React you are using. (The examples above use the adapter for React 16.) 1276 | 1277 | The adapter will also need to be configured in your [global setup file](#initializing-test-environment): 1278 | 1279 | #### `src/setupTests.js` 1280 | ```js 1281 | import { configure } from 'enzyme'; 1282 | import Adapter from 'enzyme-adapter-react-16'; 1283 | 1284 | configure({ adapter: new Adapter() }); 1285 | ``` 1286 | 1287 | Now you can write a smoke test with it: 1288 | 1289 | ```js 1290 | import React from 'react'; 1291 | import { shallow } from 'enzyme'; 1292 | import App from './App'; 1293 | 1294 | it('renders without crashing', () => { 1295 | shallow(); 1296 | }); 1297 | ``` 1298 | 1299 | Unlike the previous smoke test using `ReactDOM.render()`, this test only renders `` and doesn’t go deeper. For example, even if `` itself renders a `