├── .gitignore
├── README.md
├── package-lock.json
├── package.json
├── public
    ├── favicon.ico
    ├── index.html
    └── manifest.json
├── src
    ├── App.css
    ├── App.js
    ├── Breakpoint
    │   └── index.js
    ├── DynamicComponent
    │   └── index.js
    ├── Layout
    │   └── index.js
    ├── Link
    │   └── index.js
    ├── Typography
    │   └── index.js
    ├── index.js
    ├── reset.css
    ├── serviceWorker.js
    └── theme.js
└── yarn.lock


/.gitignore:
--------------------------------------------------------------------------------
 1 | # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 2 | 
 3 | # dependencies
 4 | /node_modules
 5 | /.pnp
 6 | .pnp.js
 7 | 
 8 | # testing
 9 | /coverage
10 | 
11 | # production
12 | /build
13 | 
14 | # misc
15 | .DS_Store
16 | .env.local
17 | .env.development.local
18 | .env.test.local
19 | .env.production.local
20 | 
21 | npm-debug.log*
22 | yarn-debug.log*
23 | yarn-error.log*
24 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | ## React typography system
 2 | This is a collection of tools and conventions I've used to create a typography system in React. It uses [styled-components](https://www.styled-components.com/) and [styled-system](https://github.com/jxnblk/styled-system/) to allow you to import styled typeography elements and override both the styling and markup like so: 
 3 | 
 4 | ```jsx
 5 | <Canon tag="p" color="red">
 6 |   Canon
 7 | </Canon>
 8 | ```
 9 | 
10 | I've this approach to re-create [GEL](http://bbc.co.uk/gel/guidelines/typography), the excellent CSS based typography system by the BBC. 
11 | Examples of this are on [CodeSandbox](https://codesandbox.io/s/kw89ro5y2r) and the full process is documented on [Medium](https://medium.com/@jezfx/building-a-react-typography-system-f9d1c8e16d55). 
12 | 
13 | ## Quick overview
14 | 
15 | The DynamicComponent is what enables you to override the styling and markup
16 | 
17 | ```jsx
18 | import React from "react";
19 | import styled from "styled-components";
20 | import tag from "clean-tag";
21 | import {
22 |   space,
23 |   lineHeight,
24 |   fontSize,
25 |   fontStyle,
26 |   size,
27 |   color,
28 |   colorStyle,
29 |   textStyle,
30 |   fontFamily,
31 |   fontWeight,
32 |   letterSpacing,
33 |   borderRadius
34 | } from "styled-system";
35 | 
36 | const StyledDynamicComponent = styled(tag)`
37 |   ${space}
38 |   ${fontSize}
39 |   ${fontStyle}
40 |   ${color}
41 |   ${size}
42 |   ${colorStyle}
43 |   ${textStyle}
44 |   ${lineHeight}
45 |   ${letterSpacing}
46 |   ${fontFamily}
47 |   ${fontWeight}
48 |   ${borderRadius}
49 | `;
50 | 
51 | const DynamicComponent = ({ tag = "div", children, ...props }) => {
52 |   const WithComponent = StyledDynamicComponent.withComponent(tag);
53 |   return <WithComponent {...props}>{children}</WithComponent>;
54 | };
55 | 
56 | DynamicComponent.defaultProps = {
57 |   tag: "div"
58 | };
59 | 
60 | export default DynamicComponent;
61 | ```
62 | [./DynamicComponent/index.js](https://github.com/Jezfx/react-typography-system/blob/master/src/DynamicComponent/index.js)
63 | 
64 | Each of the Typography styles use the higher orer DynamicComponent to enable style and markup overrides. The default styles get spread in from the theme.js file which is also passed into the ThemeProvider. 
65 | 
66 | 
67 | ```jsx
68 | export const Canon = props => (
69 |   <DynamicComponent {...canon} {...props}>
70 |     {props.children}
71 |   </DynamicComponent>
72 | );
73 | ```
74 | [./Typography/index.js](https://github.com/Jezfx/react-typography-system/blob/master/src/Typography/index.js)
75 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "typeography-system",
 3 |   "version": "0.1.0",
 4 |   "private": true,
 5 |   "dependencies": {
 6 |     "react": "^16.6.3",
 7 |     "react-dom": "^16.6.3",
 8 |     "clean-tag": "^2.0.2",
 9 |     "react-scripts": "2.1.1",
10 |     "styled-components": "^4.1.2",
11 |     "styled-system": "^3.1.11",
12 |     "webfontloader": "^1.6.28"
13 |   },
14 |   "scripts": {
15 |     "start": "react-scripts start",
16 |     "build": "react-scripts build",
17 |     "test": "react-scripts test",
18 |     "eject": "react-scripts eject"
19 |   },
20 |   "eslintConfig": {
21 |     "extends": "react-app"
22 |   },
23 |   "browserslist": [
24 |     ">0.2%",
25 |     "not dead",
26 |     "not ie <= 11",
27 |     "not op_mini all"
28 |   ]
29 | }
30 | 


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/public/favicon.ico:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/Jezfx/react-typography-system/ce48ed88a9ab9a592f08b939d90269af8e104555/public/favicon.ico


--------------------------------------------------------------------------------
/public/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 |   <head>
 4 |     <meta charset="utf-8">
 5 |     <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
 6 |     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 7 |     <meta name="theme-color" content="#000000">
 8 |     <!--
 9 |       manifest.json provides metadata used when your web app is added to the
10 |       homescreen on Android. See https://developers.google.com/web/fundamentals/web-app-manifest/
11 |     -->
12 |     <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
13 |     <!--
14 |       Notice the use of %PUBLIC_URL% in the tags above.
15 |       It will be replaced with the URL of the `public` folder during the build.
16 |       Only files inside the `public` folder can be referenced from the HTML.
17 | 
18 |       Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
19 |       work correctly both with client-side routing and a non-root public URL.
20 |       Learn how to configure a non-root public URL by running `npm run build`.
21 |     -->
22 |     <title>React App</title>
23 |   </head>
24 |   <body>
25 |     <noscript>
26 |       You need to enable JavaScript to run this app.
27 |     </noscript>
28 |     <div id="root"></div>
29 |     <!--
30 |       This HTML file is a template.
31 |       If you open it directly in the browser, you will see an empty page.
32 | 
33 |       You can add webfonts, meta tags, or analytics to this file.
34 |       The build step will place the bundled scripts into the <body> tag.
35 | 
36 |       To begin the development, run `npm start` or `yarn start`.
37 |       To create a production bundle, use `npm run build` or `yarn build`.
38 |     -->
39 |   </body>
40 | </html>
41 | 


--------------------------------------------------------------------------------
/public/manifest.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "short_name": "React App",
 3 |   "name": "Create React App Sample",
 4 |   "icons": [
 5 |     {
 6 |       "src": "favicon.ico",
 7 |       "sizes": "64x64 32x32 24x24 16x16",
 8 |       "type": "image/x-icon"
 9 |     }
10 |   ],
11 |   "start_url": ".",
12 |   "display": "standalone",
13 |   "theme_color": "#000000",
14 |   "background_color": "#ffffff"
15 | }
16 | 


--------------------------------------------------------------------------------
/src/App.css:
--------------------------------------------------------------------------------
 1 | .App {
 2 |   text-align: center;
 3 | }
 4 | 
 5 | .App-logo {
 6 |   animation: App-logo-spin infinite 20s linear;
 7 |   height: 40vmin;
 8 | }
 9 | 
10 | .App-header {
11 |   background-color: #282c34;
12 |   min-height: 100vh;
13 |   display: flex;
14 |   flex-direction: column;
15 |   align-items: center;
16 |   justify-content: center;
17 |   font-size: calc(10px + 2vmin);
18 |   color: white;
19 | }
20 | 
21 | .App-link {
22 |   color: #61dafb;
23 | }
24 | 
25 | @keyframes App-logo-spin {
26 |   from {
27 |     transform: rotate(0deg);
28 |   }
29 |   to {
30 |     transform: rotate(360deg);
31 |   }
32 | }
33 | 


--------------------------------------------------------------------------------
/src/App.js:
--------------------------------------------------------------------------------
  1 | import React, { Component } from "react";
  2 | import styled, { ThemeProvider } from "styled-components";
  3 | import { Split, Row, Section } from "./Layout";
  4 | import Link from "./Link";
  5 | 
  6 | import {
  7 |   Canon,
  8 |   Trafalgar,
  9 |   Paragon,
 10 |   GreatPrimer,
 11 |   DoublePica,
 12 |   BodyCopy,
 13 |   Code
 14 | } from "./Typography";
 15 | import Breakpoint from "./Breakpoint";
 16 | 
 17 | import theme from "./theme";
 18 | import "./App.css";
 19 | 
 20 | const Uppercase = styled(GreatPrimer)`
 21 |   text-transform: uppercase;
 22 | `;
 23 | 
 24 | class App extends Component {
 25 |   render() {
 26 |     return (
 27 |       <ThemeProvider theme={theme}>
 28 |         <>
 29 |           <Section>
 30 |             <Breakpoint />
 31 |           </Section>
 32 | 
 33 |           <Section>
 34 |             <Split>
 35 |               <Canon>Canon</Canon>
 36 |               <BodyCopy>Hero or blog post title</BodyCopy>
 37 |             </Split>
 38 | 
 39 |             <Split>
 40 |               <Trafalgar>Trafalgar</Trafalgar>
 41 |               <BodyCopy>Article title or section header</BodyCopy>
 42 |             </Split>
 43 | 
 44 |             <Split>
 45 |               <Paragon>Paragon</Paragon>
 46 |               <BodyCopy>Primary headline on indexes</BodyCopy>
 47 |             </Split>
 48 | 
 49 |             <Split>
 50 |               <DoublePica>DoublePica</DoublePica>
 51 |               <BodyCopy>Sub header</BodyCopy>
 52 |             </Split>
 53 | 
 54 |             <Split>
 55 |               <GreatPrimer>GreatPrimer</GreatPrimer>
 56 |               <BodyCopy>Headline title or subtitle</BodyCopy>
 57 |             </Split>
 58 | 
 59 |             <Split>
 60 |               <BodyCopy>BodyCopy</BodyCopy>
 61 |               <BodyCopy>Article body copy only</BodyCopy>
 62 |             </Split>
 63 | 
 64 |             <Split>
 65 |               <Code>Code</Code>
 66 |               <BodyCopy>For code wrapped snippets</BodyCopy>
 67 |             </Split>
 68 |           </Section>
 69 | 
 70 |           <Section>
 71 |             <Row>
 72 |               <Canon tag="p" color="red">
 73 |                 Canon
 74 |               </Canon>
 75 |               <Code
 76 |                 fontSize={2}
 77 |               >{`<Canon tag="p" color={theme.colours.mantis}>`}</Code>
 78 |             </Row>
 79 | 
 80 |             <Row>
 81 |               <Trafalgar textStyle="underline">Trafalgar</Trafalgar>
 82 |               <Code
 83 |                 fontSize={2}
 84 |               >{`<Trafalgar textStyle="underline">Trafalgar</Trafalgar>`}</Code>
 85 |             </Row>
 86 | 
 87 |             <Row>
 88 |               <Trafalgar color="#fff" bg={theme.colours.bostonBlue}>
 89 |                 Paragon
 90 |               </Trafalgar>
 91 |               <Code
 92 |                 fontSize={2}
 93 |               >{`<Trafalgar color="#fff" bg={theme.colours.bostonBlue}>`}</Code>
 94 |             </Row>
 95 | 
 96 |             <Row>
 97 |               <DoublePica>
 98 |                 <Link href="#">Double Pica</Link>
 99 |               </DoublePica>
100 |               <Code
101 |                 fontSize={2}
102 |               >{`<DoublePica><Link href="#">Double Pica</Link></DoublePica>`}</Code>
103 |             </Row>
104 | 
105 |             <Row>
106 |               <Uppercase fontSize={3} fontWeight={700} tag="h6">
107 |                 Great Primer
108 |               </Uppercase>
109 |               <Code
110 |                 fontSize={2}
111 |               >{`<Uppercase fontSize={3} fontWeight={700} tag="h6">Great Primer</Uppercase>`}</Code>
112 |             </Row>
113 | 
114 |             <Row>
115 |               <BodyCopy tag="i">Body Copy</BodyCopy>
116 |               <br />
117 |               <Code
118 |                 fontSize={2}
119 |               >{`<BodyCopy tag="i">Body Copy</BodyCopy>`}</Code>
120 |             </Row>
121 |           </Section>
122 |           <Section>
123 |             <BodyCopy>
124 |               View the full write up on{" "}
125 |               <Link href="https://medium.com/p/f9d1c8e16d55/">Medium</Link> ✌️
126 |             </BodyCopy>
127 |           </Section>
128 |         </>
129 |       </ThemeProvider>
130 |     );
131 |   }
132 | }
133 | 
134 | export default App;
135 | 


--------------------------------------------------------------------------------
/src/Breakpoint/index.js:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | import styled from "styled-components";
 3 | 
 4 | import theme from "../theme";
 5 | 
 6 | const Breakpoint = styled.span`
 7 |   padding: 2px 4px;
 8 |   background: ${theme.colours.citrineWhite};
 9 | 
10 |   &:after {
11 |     content: "A";
12 | 
13 |     @media screen and (min-width: ${theme.breakpoints[0]}) {
14 |       content: "B";
15 |     }
16 |     @media screen and (min-width: ${theme.breakpoints[1]}) {
17 |       content: "C";
18 |     }
19 |   }
20 | `;
21 | 
22 | export default () => <Breakpoint>Breakpoint: </Breakpoint>;
23 | 


--------------------------------------------------------------------------------
/src/DynamicComponent/index.js:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | import styled from "styled-components";
 3 | import tag from "clean-tag";
 4 | import {
 5 |   space,
 6 |   lineHeight,
 7 |   fontSize,
 8 |   fontStyle,
 9 |   size,
10 |   color,
11 |   colorStyle,
12 |   textStyle,
13 |   fontFamily,
14 |   fontWeight,
15 |   letterSpacing,
16 |   borderRadius
17 | } from "styled-system";
18 | 
19 | const StyledDynamicComponent = styled(tag)`
20 |   ${space}
21 |   ${fontSize}
22 |   ${fontStyle}
23 |   ${color}
24 |   ${size}
25 |   ${colorStyle}
26 |   ${textStyle}
27 |   ${lineHeight}
28 |   ${letterSpacing}
29 |   ${fontFamily}
30 |   ${fontWeight}
31 |   ${borderRadius}
32 | `;
33 | 
34 | const DynamicComponent = ({ tag = "div", children, ...props }) => {
35 |   const WithComponent = StyledDynamicComponent.withComponent(tag);
36 |   return <WithComponent {...props}>{children}</WithComponent>;
37 | };
38 | 
39 | DynamicComponent.defaultProps = {
40 |   tag: "div"
41 | };
42 | 
43 | export default DynamicComponent;
44 | 


--------------------------------------------------------------------------------
/src/Layout/index.js:
--------------------------------------------------------------------------------
 1 | import styled from "styled-components";
 2 | import theme from "../theme";
 3 | 
 4 | const Article = styled.article`
 5 |   padding: 10px 0;
 6 |   margin-bottom: 40px;
 7 |   border-bottom: solid 1px #ccc;
 8 | `;
 9 | 
10 | export const Section = styled.section`
11 |   margin-bottom: 80px;
12 | `;
13 | 
14 | export const Split = styled(Article)`
15 |   display: flex;
16 |   flex-direction: column;
17 |   justify-content: space-between;
18 |   align-items: baseline;
19 | 
20 |   @media screen and (min-width: ${theme.breakpoints[0]}) {
21 |     flex-direction: row;
22 |   }
23 | `;
24 | 
25 | export const Row = styled(Article)`
26 |   *:first-child {
27 |     margin-bottom: 10px;
28 |   }
29 | `;
30 | 


--------------------------------------------------------------------------------
/src/Link/index.js:
--------------------------------------------------------------------------------
 1 | import styled from "styled-components";
 2 | import theme from "../theme";
 3 | 
 4 | export default styled.a`
 5 |   color: ${theme.colours.bostonBlue};
 6 |   text-decoration: underline;
 7 | 
 8 |   &:hover {
 9 |     color: ${theme.colours.stTropaz};
10 |   }
11 | `;
12 | 


--------------------------------------------------------------------------------
/src/Typography/index.js:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | import DynamicComponent from "../DynamicComponent";
 3 | import theme from "../theme";
 4 | 
 5 | const {
 6 |   canon,
 7 |   trafalgar,
 8 |   paragon,
 9 |   greatPrimer,
10 |   doublePica,
11 |   bodyCopy,
12 |   pica,
13 |   code
14 | } = theme.textStyles;
15 | 
16 | export const Canon = props => (
17 |   <DynamicComponent {...canon} {...props}>
18 |     {props.children}
19 |   </DynamicComponent>
20 | );
21 | 
22 | export const Trafalgar = props => (
23 |   <DynamicComponent {...trafalgar} {...props}>
24 |     {props.children}
25 |   </DynamicComponent>
26 | );
27 | 
28 | export const Paragon = props => (
29 |   <DynamicComponent {...paragon} {...props}>
30 |     {props.children}
31 |   </DynamicComponent>
32 | );
33 | 
34 | export const GreatPrimer = props => (
35 |   <DynamicComponent {...greatPrimer} {...props}>
36 |     {props.children}
37 |   </DynamicComponent>
38 | );
39 | 
40 | export const DoublePica = props => (
41 |   <DynamicComponent {...doublePica} {...props}>
42 |     {props.children}
43 |   </DynamicComponent>
44 | );
45 | 
46 | export const BodyCopy = props => (
47 |   <DynamicComponent {...bodyCopy} {...props}>
48 |     {props.children}
49 |   </DynamicComponent>
50 | );
51 | 
52 | export const Pica = props => (
53 |   <DynamicComponent {...pica} {...props}>
54 |     {props.children}
55 |   </DynamicComponent>
56 | );
57 | 
58 | export const Code = props => (
59 |   <DynamicComponent {...code} {...props}>
60 |     {props.children}
61 |   </DynamicComponent>
62 | );
63 | 


--------------------------------------------------------------------------------
/src/index.js:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | import ReactDOM from "react-dom";
 3 | import WebFont from "webfontloader";
 4 | import { createGlobalStyle } from "styled-components";
 5 | 
 6 | import "./reset.css";
 7 | import App from "./App";
 8 | import * as serviceWorker from "./serviceWorker";
 9 | 
10 | const GlobalStyle = createGlobalStyle`
11 |   body {
12 |     padding: 10px;
13 |     max-width: 700px;
14 |   }
15 | `;
16 | 
17 | WebFont.load({
18 |   google: {
19 |     families: ["Poppins: 400,500,700", "PT Serif: 400,700]", "Roboto Mono"]
20 |   }
21 | });
22 | 
23 | const Root = (
24 |   <>
25 |     <GlobalStyle />
26 |     <App />
27 |   </>
28 | );
29 | 
30 | ReactDOM.render(Root, document.getElementById("root"));
31 | 
32 | // If you want your app to work offline and load faster, you can change
33 | // unregister() to register() below. Note this comes with some pitfalls.
34 | // Learn more about service workers: http://bit.ly/CRA-PWA
35 | serviceWorker.unregister();
36 | 


--------------------------------------------------------------------------------
/src/reset.css:
--------------------------------------------------------------------------------
 1 |   /* http://meyerweb.com/eric/tools/css/reset/
 2 |   v2.0 | 20110126
 3 |   License: none (public domain)
 4 | */
 5 | 
 6 | html, body, div, span, applet, object, iframe,
 7 | h1, h2, h3, h4, h5, h6, p, blockquote, pre,
 8 | a, abbr, acronym, address, big, cite, code,
 9 | del, dfn, em, img, ins, kbd, q, s, samp,
10 | small, strike, strong, sub, sup, tt, var,
11 | b, u, i, center,
12 | dl, dt, dd, ol, ul, li,
13 | fieldset, form, label, legend,
14 | table, caption, tbody, tfoot, thead, tr, th, td,
15 | article, aside, canvas, details, embed,
16 | figure, figcaption, footer, header, hgroup,
17 | menu, nav, output, ruby, section, summary,
18 | time, mark, audio, video {
19 |  margin: 0;
20 |  padding: 0;
21 |  border: 0;
22 |  font-size: 100%;
23 |  vertical-align: baseline;
24 | }
25 | /* HTML5 display-role reset for older browsers */
26 | article, aside, details, figcaption, figure,
27 | footer, header, hgroup, menu, nav, section {
28 |  display: block;
29 | }
30 | body {
31 |  line-height: 1;
32 | }
33 | ol, ul {
34 |  list-style: none;
35 | }
36 | blockquote, q {
37 |  quotes: none;
38 | }
39 | blockquote:before, blockquote:after,
40 | q:before, q:after {
41 |  content: '';
42 |  content: none;
43 | }
44 | table {
45 |  border-collapse: collapse;
46 |  border-spacing: 0;
47 | }


--------------------------------------------------------------------------------
/src/serviceWorker.js:
--------------------------------------------------------------------------------
  1 | // This optional code is used to register a service worker.
  2 | // register() is not called by default.
  3 | 
  4 | // This lets the app load faster on subsequent visits in production, and gives
  5 | // it offline capabilities. However, it also means that developers (and users)
  6 | // will only see deployed updates on subsequent visits to a page, after all the
  7 | // existing tabs open on the page have been closed, since previously cached
  8 | // resources are updated in the background.
  9 | 
 10 | // To learn more about the benefits of this model and instructions on how to
 11 | // opt-in, read http://bit.ly/CRA-PWA
 12 | 
 13 | const isLocalhost = Boolean(
 14 |   window.location.hostname === 'localhost' ||
 15 |     // [::1] is the IPv6 localhost address.
 16 |     window.location.hostname === '[::1]' ||
 17 |     // 127.0.0.1/8 is considered localhost for IPv4.
 18 |     window.location.hostname.match(
 19 |       /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
 20 |     )
 21 | );
 22 | 
 23 | export function register(config) {
 24 |   if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
 25 |     // The URL constructor is available in all browsers that support SW.
 26 |     const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
 27 |     if (publicUrl.origin !== window.location.origin) {
 28 |       // Our service worker won't work if PUBLIC_URL is on a different origin
 29 |       // from what our page is served on. This might happen if a CDN is used to
 30 |       // serve assets; see https://github.com/facebook/create-react-app/issues/2374
 31 |       return;
 32 |     }
 33 | 
 34 |     window.addEventListener('load', () => {
 35 |       const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
 36 | 
 37 |       if (isLocalhost) {
 38 |         // This is running on localhost. Let's check if a service worker still exists or not.
 39 |         checkValidServiceWorker(swUrl, config);
 40 | 
 41 |         // Add some additional logging to localhost, pointing developers to the
 42 |         // service worker/PWA documentation.
 43 |         navigator.serviceWorker.ready.then(() => {
 44 |           console.log(
 45 |             'This web app is being served cache-first by a service ' +
 46 |               'worker. To learn more, visit http://bit.ly/CRA-PWA'
 47 |           );
 48 |         });
 49 |       } else {
 50 |         // Is not localhost. Just register service worker
 51 |         registerValidSW(swUrl, config);
 52 |       }
 53 |     });
 54 |   }
 55 | }
 56 | 
 57 | function registerValidSW(swUrl, config) {
 58 |   navigator.serviceWorker
 59 |     .register(swUrl)
 60 |     .then(registration => {
 61 |       registration.onupdatefound = () => {
 62 |         const installingWorker = registration.installing;
 63 |         if (installingWorker == null) {
 64 |           return;
 65 |         }
 66 |         installingWorker.onstatechange = () => {
 67 |           if (installingWorker.state === 'installed') {
 68 |             if (navigator.serviceWorker.controller) {
 69 |               // At this point, the updated precached content has been fetched,
 70 |               // but the previous service worker will still serve the older
 71 |               // content until all client tabs are closed.
 72 |               console.log(
 73 |                 'New content is available and will be used when all ' +
 74 |                   'tabs for this page are closed. See http://bit.ly/CRA-PWA.'
 75 |               );
 76 | 
 77 |               // Execute callback
 78 |               if (config && config.onUpdate) {
 79 |                 config.onUpdate(registration);
 80 |               }
 81 |             } else {
 82 |               // At this point, everything has been precached.
 83 |               // It's the perfect time to display a
 84 |               // "Content is cached for offline use." message.
 85 |               console.log('Content is cached for offline use.');
 86 | 
 87 |               // Execute callback
 88 |               if (config && config.onSuccess) {
 89 |                 config.onSuccess(registration);
 90 |               }
 91 |             }
 92 |           }
 93 |         };
 94 |       };
 95 |     })
 96 |     .catch(error => {
 97 |       console.error('Error during service worker registration:', error);
 98 |     });
 99 | }
100 | 
101 | function checkValidServiceWorker(swUrl, config) {
102 |   // Check if the service worker can be found. If it can't reload the page.
103 |   fetch(swUrl)
104 |     .then(response => {
105 |       // Ensure service worker exists, and that we really are getting a JS file.
106 |       const contentType = response.headers.get('content-type');
107 |       if (
108 |         response.status === 404 ||
109 |         (contentType != null && contentType.indexOf('javascript') === -1)
110 |       ) {
111 |         // No service worker found. Probably a different app. Reload the page.
112 |         navigator.serviceWorker.ready.then(registration => {
113 |           registration.unregister().then(() => {
114 |             window.location.reload();
115 |           });
116 |         });
117 |       } else {
118 |         // Service worker found. Proceed as normal.
119 |         registerValidSW(swUrl, config);
120 |       }
121 |     })
122 |     .catch(() => {
123 |       console.log(
124 |         'No internet connection found. App is running in offline mode.'
125 |       );
126 |     });
127 | }
128 | 
129 | export function unregister() {
130 |   if ('serviceWorker' in navigator) {
131 |     navigator.serviceWorker.ready.then(registration => {
132 |       registration.unregister();
133 |     });
134 |   }
135 | }
136 | 


--------------------------------------------------------------------------------
/src/theme.js:
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 1 | // http://chir.ag/projects/name-that-color/
 2 | const colours = {
 3 |   bostonBlue: "#428bca",
 4 |   stTropaz: "#2a6496",
 5 |   maroonFlush: "#c7254e",
 6 |   softPeach: "#f9f2f4",
 7 |   mantis: "#6ECE5A",
 8 |   citrineWhite: "#FBF7DC"
 9 | };
10 | 
11 | const fontFamilies = {
12 |   heading: "Poppins, Helvetica, Arial, sans-serif",
13 |   body: "PT Serif, Helvetica, Arial, sans-serif",
14 |   code: "Roboto Mono, monospace"
15 | };
16 | 
17 | export default {
18 |   textStyles: {
19 |     canon: {
20 |       tag: "h1",
21 |       fontSize: [11, 12, 14],
22 |       fontWeight: 700,
23 |       lineHeight: ["32px", "36px", "56px"],
24 |       fontFamily: fontFamilies.heading
25 |     },
26 |     trafalgar: {
27 |       tag: "h1",
28 |       fontSize: [6, 9, 12],
29 |       lineHeight: ["24px", "28px", "40px"],
30 |       fontWeight: 500,
31 |       fontFamily: fontFamilies.heading
32 |     },
33 |     paragon: {
34 |       tag: "h2",
35 |       fontSize: [6, 8, 11],
36 |       fontWeight: 500,
37 |       fontFamily: fontFamilies.heading,
38 |       lineHeight: ["20px", "26px", "32px"]
39 |     },
40 |     doublePica: {
41 |       fontSize: [6, 6, 10],
42 |       fontWeight: 400,
43 |       fontFamily: fontFamilies.heading,
44 |       lineHeight: ["24px", "24px", "30px"]
45 |     },
46 |     greatPrimer: {
47 |       tag: "h3",
48 |       fontWeight: 400,
49 |       fontSize: [5, 5, 7],
50 |       fontFamily: fontFamilies.heading,
51 |       lineHeight: ["22px", "22px", "24px"]
52 |     },
53 |     bodyCopy: {
54 |       tag: "p",
55 |       fontSize: [3, 4, 5],
56 |       fontFamily: fontFamilies.body,
57 |       lineHeight: ["20px", "22px", "24px"]
58 |     },
59 |     code: {
60 |       tag: "span",
61 |       px: "4px",
62 |       py: "2px",
63 |       lineHeight: "22px",
64 |       color: colours.maroonFlush,
65 |       bg: colours.softPeach,
66 |       borderRadius: 4,
67 |       fontFamily: fontFamilies.code
68 |     },
69 |     underline: {
70 |       textDecoration: "underline"
71 |     }
72 |   },
73 |   fontSizes: [12, 13, 14, 15, 16, 18, 20, 21, 22, 24, 26, 28, 32, 36, 52],
74 |   breakpoints: ["319px", "599px"],
75 |   colours: {
76 |     ...colours
77 |   }
78 | };
79 | 


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