├── .editorconfig ├── .eslintrc ├── .github └── workflows │ ├── node-aught.yml │ ├── node-harmony.yml │ ├── node-pretest.yml │ ├── node-tens.yml │ ├── node-twenties.yml │ ├── rebase.yml │ └── require-allow-edits.yml ├── .gitignore ├── .npmrc ├── .nycrc ├── CHANGELOG.md ├── LICENSE ├── README.md ├── index.d.ts ├── index.js ├── package.json ├── test-corejs.js ├── test └── index.js └── tsconfig.json /.editorconfig: -------------------------------------------------------------------------------- 1 | root = true 2 | 3 | [*] 4 | indent_style = tab 5 | indent_size = 4 6 | end_of_line = lf 7 | charset = utf-8 8 | trim_trailing_whitespace = true 9 | insert_final_newline = true 10 | max_line_length = 200 11 | 12 | [CHANGELOG.md] 13 | indent_style = space 14 | indent_size = 2 15 | 16 | [*.json] 17 | max_line_length = off 18 | 19 | [Makefile] 20 | max_line_length = off 21 | 22 | [CHANGELOG.md] 23 | max_line_length = off 24 | -------------------------------------------------------------------------------- /.eslintrc: -------------------------------------------------------------------------------- 1 | { 2 | "root": true, 3 | 4 | "extends": "@ljharb", 5 | 6 | "rules": { 7 | "func-style": 0, 8 | "id-length": [1], 9 | }, 10 | } 11 | -------------------------------------------------------------------------------- /.github/workflows/node-aught.yml: -------------------------------------------------------------------------------- 1 | name: 'Tests: node.js < 10' 2 | 3 | on: [pull_request, push] 4 | 5 | jobs: 6 | tests: 7 | uses: ljharb/actions/.github/workflows/node.yml@main 8 | with: 9 | range: '< 10' 10 | type: minors 11 | command: npm run tests-only 12 | 13 | node: 14 | name: 'node < 10' 15 | needs: [tests] 16 | runs-on: ubuntu-latest 17 | steps: 18 | - run: 'echo tests completed' 19 | -------------------------------------------------------------------------------- /.github/workflows/node-harmony.yml: -------------------------------------------------------------------------------- 1 | name: 'Tests: node.js (harmony)' 2 | 3 | on: [pull_request, push] 4 | 5 | jobs: 6 | tests: 7 | uses: ljharb/actions/.github/workflows/node.yml@main 8 | with: 9 | range: '>0.4 <16' 10 | type: minors 11 | command: npm run test:harmony 12 | 13 | node: 14 | name: 'node: harmony' 15 | needs: [tests] 16 | runs-on: ubuntu-latest 17 | steps: 18 | - run: 'echo tests completed' 19 | -------------------------------------------------------------------------------- /.github/workflows/node-pretest.yml: -------------------------------------------------------------------------------- 1 | name: 'Tests: pretest/posttest' 2 | 3 | on: [pull_request, push] 4 | 5 | jobs: 6 | tests: 7 | uses: ljharb/actions/.github/workflows/pretest.yml@main 8 | -------------------------------------------------------------------------------- /.github/workflows/node-tens.yml: -------------------------------------------------------------------------------- 1 | name: 'Tests: node.js 10 - 20' 2 | 3 | on: [pull_request, push] 4 | 5 | permissions: 6 | contents: read 7 | 8 | jobs: 9 | tests: 10 | uses: ljharb/actions/.github/workflows/node.yml@main 11 | with: 12 | range: '>= 10 < 20' 13 | type: minors 14 | command: npm run tests-only 15 | -------------------------------------------------------------------------------- /.github/workflows/node-twenties.yml: -------------------------------------------------------------------------------- 1 | name: 'Tests: node.js >= 20' 2 | 3 | on: [pull_request, push] 4 | 5 | permissions: 6 | contents: read 7 | 8 | jobs: 9 | tests: 10 | uses: ljharb/actions/.github/workflows/node.yml@main 11 | with: 12 | range: '>= 20' 13 | type: minors 14 | command: npm run tests-only 15 | -------------------------------------------------------------------------------- /.github/workflows/rebase.yml: -------------------------------------------------------------------------------- 1 | name: Automatic Rebase 2 | 3 | on: [pull_request_target] 4 | 5 | jobs: 6 | _: 7 | uses: ljharb/actions/.github/workflows/rebase.yml@main 8 | secrets: 9 | token: ${{ secrets.GITHUB_TOKEN }} 10 | -------------------------------------------------------------------------------- /.github/workflows/require-allow-edits.yml: -------------------------------------------------------------------------------- 1 | name: Require “Allow Edits” 2 | 3 | on: [pull_request_target] 4 | 5 | jobs: 6 | _: 7 | name: "Require “Allow Edits”" 8 | 9 | runs-on: ubuntu-latest 10 | 11 | steps: 12 | - uses: ljharb/require-allow-edits@main 13 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # gitignore 2 | 3 | lib-cov 4 | *.seed 5 | *.log 6 | *.csv 7 | *.dat 8 | *.out 9 | *.pid 10 | *.gz 11 | 12 | pids 13 | logs 14 | results 15 | 16 | npm-debug.log 17 | node_modules 18 | 19 | # Only apps should have lockfiles 20 | yarn.lock 21 | npm-shrinkwrap.json 22 | package-lock.json 23 | 24 | coverage/ 25 | .nyc_output/ 26 | 27 | .npmignore 28 | -------------------------------------------------------------------------------- /.npmrc: -------------------------------------------------------------------------------- 1 | package-lock=false 2 | allow-same-version=true 3 | message=v%s 4 | -------------------------------------------------------------------------------- /.nycrc: -------------------------------------------------------------------------------- 1 | { 2 | "all": true, 3 | "check-coverage": false, 4 | "reporter": ["text-summary", "text", "html", "json"], 5 | "exclude": [ 6 | "coverage", 7 | "test", 8 | "test-corejs.js" 9 | ] 10 | } 11 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Changelog 2 | 3 | All notable changes to this project will be documented in this file. 4 | 5 | The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) 6 | and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). 7 | 8 | ## [v1.2.1](https://github.com/inspect-js/is-regex/compare/v1.2.0...v1.2.1) - 2024-12-11 9 | 10 | ### Commits 11 | 12 | - [Refactor] use `call-bound` directly [`dbabfe3`](https://github.com/inspect-js/is-regex/commit/dbabfe369261f4940f8ca059e9d452fed01e6969) 13 | - [Deps] update `call-bind`, `gopd` [`d5343a0`](https://github.com/inspect-js/is-regex/commit/d5343a0e05ac3c65243b29f740c7540480ad23e7) 14 | - [Dev Deps] update `@arethetypeswrong/cli`, `@ljharb/tsconfig` [`cc081eb`](https://github.com/inspect-js/is-regex/commit/cc081eb891b075440188c3f5240b2051090f1036) 15 | 16 | ## [v1.2.0](https://github.com/inspect-js/is-regex/compare/v1.1.4...v1.2.0) - 2024-11-29 17 | 18 | ### Fixed 19 | 20 | - [Tests] allow tests to pass if zero traps are triggered [`#35`](https://github.com/inspect-js/is-regex/issues/35) 21 | 22 | ### Commits 23 | 24 | - [actions] reuse common workflows [`be7bf6a`](https://github.com/inspect-js/is-regex/commit/be7bf6af175271e9db74e092d636307f6cf5e848) 25 | - [New] add types [`39066a4`](https://github.com/inspect-js/is-regex/commit/39066a426da0f0c597b888c3c839fb2efc2bf613) 26 | - [meta] use `npmignore` to autogenerate an npmignore file [`8938588`](https://github.com/inspect-js/is-regex/commit/89385885c2da891644e07220b4407f760c3dd629) 27 | - [Refactor] reorganize code [`2f76f26`](https://github.com/inspect-js/is-regex/commit/2f76f26e0008a01a2f9a849dc2687cf3e3146f3e) 28 | - [actions] split out node 10-20, and 20+ [`8c9aedf`](https://github.com/inspect-js/is-regex/commit/8c9aedf2cd9b3fd4ee045d747580265de223b4b2) 29 | - [meta] better `eccheck` command [`6b39408`](https://github.com/inspect-js/is-regex/commit/6b39408bc4cce49ac85de70fba4a843da4b78b84) 30 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `safe-publish-latest`, `tape` [`e38cf3c`](https://github.com/inspect-js/is-regex/commit/e38cf3c4e5b234c9a0d64fcf75e45df9b2416557) 31 | - [actions] update codecov uploader [`487c75d`](https://github.com/inspect-js/is-regex/commit/487c75da7bbc2d977c2aed68815e7a58d269011f) 32 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud`, `auto-changelog`, `core-js`, `foreach`, `tape` [`0d7da87`](https://github.com/inspect-js/is-regex/commit/0d7da87be90b637c094abfd9e68568097d391e38) 33 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud`, `core-js`, `tape` [`c1c1198`](https://github.com/inspect-js/is-regex/commit/c1c1198143feaadee0370b78f7fd878e64e57a58) 34 | - [actions] update rebase action to use reusable workflow [`213646e`](https://github.com/inspect-js/is-regex/commit/213646e1e9b5211bf621ccaaaa29f03b706b139c) 35 | - [Dev Deps] update `@ljharb/eslint-config`, `auto-changelog`, `core-js`, `npmignore`, `tape` [`0a44e77`](https://github.com/inspect-js/is-regex/commit/0a44e77855db0ee8077f8b4351164fa500ba0d1f) 36 | - [Refactor] use `hasown` [`d939332`](https://github.com/inspect-js/is-regex/commit/d939332c57cf46b95bc45e721fb66db64cf4743a) 37 | - [Deps] update `call-bind`, `has-tostringtag` [`46bfdc9`](https://github.com/inspect-js/is-regex/commit/46bfdc9226df0495b5eb4e753e3f61e9a648cf44) 38 | - [Tests] use `for-each` instead of `foreach` [`138b3f2`](https://github.com/inspect-js/is-regex/commit/138b3f2e6340eb4b6caf62981b0a1f59e960cbc9) 39 | - [Tests] replace `aud` with `npm audit` [`37ed80a`](https://github.com/inspect-js/is-regex/commit/37ed80a3a5eeec2312f45956bc928fc7937480b8) 40 | - [Deps] update `gopd` [`6fd4097`](https://github.com/inspect-js/is-regex/commit/6fd4097f23c3f031d0e659b29174216bed7b4f0f) 41 | - [Dev Deps] update `core-js` [`97c1c60`](https://github.com/inspect-js/is-regex/commit/97c1c6044684f8a661055f4614ab2dd58fbfcc2b) 42 | - [Dev Deps] add missing peer dep [`7329b8e`](https://github.com/inspect-js/is-regex/commit/7329b8edc9d9440439f190704f03740c853d15da) 43 | 44 | ## [v1.1.4](https://github.com/inspect-js/is-regex/compare/v1.1.3...v1.1.4) - 2021-08-05 45 | 46 | ### Commits 47 | 48 | - [Dev Deps] update `auto-changelog`, `core-js`, `eslint`, `tape` [`4b17cad`](https://github.com/inspect-js/is-regex/commit/4b17cad8496b1ae621b18335fa3afe94d0c65e83) 49 | - [Refactor] use `has-tostringtag` to behave correctly in the presence of symbol shams [`2dad4af`](https://github.com/inspect-js/is-regex/commit/2dad4afffa15f07cbbf7675b77d1f650c92652c4) 50 | 51 | ## [v1.1.3](https://github.com/inspect-js/is-regex/compare/v1.1.2...v1.1.3) - 2021-05-07 52 | 53 | ### Commits 54 | 55 | - [actions] use `node/install` instead of `node/run`; use `codecov` action [`c681ab9`](https://github.com/inspect-js/is-regex/commit/c681ab99c07f8b3b7ae5f652b3105a30bce94f69) 56 | - [Fix] do not use `Object.prototype.toString` when `Symbol.toStringTag` is shammed [`ca019fd`](https://github.com/inspect-js/is-regex/commit/ca019fdb828dc7d32e323213403ac9995d8604e3) 57 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud`, `tape` [`605a66f`](https://github.com/inspect-js/is-regex/commit/605a66f278900f1c8ae9d1dfcec31e5f61b10ad3) 58 | - [readme] add actions and codecov badges [`8d7c6f0`](https://github.com/inspect-js/is-regex/commit/8d7c6f0e007bd982f21b958e0abc98b8a84e2a24) 59 | - [meta] use `prepublishOnly` script for npm 7+ [`8e50e91`](https://github.com/inspect-js/is-regex/commit/8e50e91f51aa5038745526710ef2e030527982a7) 60 | - [Deps] update `has-symbols` [`4742c81`](https://github.com/inspect-js/is-regex/commit/4742c81260c3db9a8c9ef57110981fb6175f58e0) 61 | 62 | ## [v1.1.2](https://github.com/inspect-js/is-regex/compare/v1.1.1...v1.1.2) - 2021-02-01 63 | 64 | ### Commits 65 | 66 | - [Tests] migrate tests to Github Actions [`cc1686e`](https://github.com/inspect-js/is-regex/commit/cc1686e25f446ca6948f43b3f180d6e55e31fb4e) 67 | - [readme] fix repo URLs; remove travis badge [`d1d1da6`](https://github.com/inspect-js/is-regex/commit/d1d1da647bb4e91589606f12470cd27a47b3bb81) 68 | - [meta] do not publish github action workflow files [`9f84b99`](https://github.com/inspect-js/is-regex/commit/9f84b993a995f057b4d2d097ef47b1ff9c84115d) 69 | - [Tests] run `nyc` on all tests [`c37aab9`](https://github.com/inspect-js/is-regex/commit/c37aab9d332c4834b08ada94736c45ab1d39cd2f) 70 | - [Robustness] use `call-bind` [`fbb61bf`](https://github.com/inspect-js/is-regex/commit/fbb61bf3e19ccc178e6ed1e0d7ab9cc7c7167393) 71 | - [actions] add "Allow Edits" workflow [`9022b53`](https://github.com/inspect-js/is-regex/commit/9022b53cb05b0f105cd179800cf96e055b249f08) 72 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud`, `auto-changelog` [`d60f28f`](https://github.com/inspect-js/is-regex/commit/d60f28f7f2fb21dade7bce302b3e0246206423d3) 73 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `tape` [`2c35c43`](https://github.com/inspect-js/is-regex/commit/2c35c437edf3eeb37129eea2404d8f465d27620f) 74 | - [actions] switch Automatic Rebase workflow to `pull_request_target` event [`1009e25`](https://github.com/inspect-js/is-regex/commit/1009e259d49a63753dc6e79e2b876a30c00c6de6) 75 | - [meta] gitignore coverage output [`3b5fa9e`](https://github.com/inspect-js/is-regex/commit/3b5fa9ed2882c65ee81dff979f79f1a2751d3772) 76 | - [actions] update workflows [`1843ef6`](https://github.com/inspect-js/is-regex/commit/1843ef65b8b8c24a44e91bc4ed5ee60dffc31c2d) 77 | 78 | ## [v1.1.1](https://github.com/inspect-js/is-regex/compare/v1.1.0...v1.1.1) - 2020-08-03 79 | 80 | ### Commits 81 | 82 | - [Performance] Re-add lastIndex check to improve performance [`d8495cd`](https://github.com/inspect-js/is-regex/commit/d8495cd22d475ddca250818921b6088f631c1972) 83 | - [Dev Deps] update `auto-changelog`, `eslint` [`778fa6b`](https://github.com/inspect-js/is-regex/commit/778fa6b9d2b182ee6d73993e103532855e956f85) 84 | 85 | ## [v1.1.0](https://github.com/inspect-js/is-regex/compare/v1.0.5...v1.1.0) - 2020-06-03 86 | 87 | ### Commits 88 | 89 | - [New] use `badStringifier`‑based RegExp detection [`31eff67`](https://github.com/inspect-js/is-regex/commit/31eff673243d65c3d6c05848c0eb52f5380f1be3) 90 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud`, `tape` [`fc91458`](https://github.com/inspect-js/is-regex/commit/fc914588187b8bb00d8d792c84f06a6e15d883c1) 91 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `tape`; add `safe-publish-latest` [`d43ed83`](https://github.com/inspect-js/is-regex/commit/d43ed83db54ea727bb0b1b77a50af79d1edb8a6d) 92 | - [Dev Deps] update `auto-changelog`, `tape`; add `aud` [`56647d1`](https://github.com/inspect-js/is-regex/commit/56647d196be34ef3c118ad67726e75169fbcb875) 93 | - [meta] only run `aud` on prod deps [`e0865b8`](https://github.com/inspect-js/is-regex/commit/e0865b8360b0ac1b9d17b7b81ae5f339e5c9036b) 94 | 95 | ## [v1.0.5](https://github.com/inspect-js/is-regex/compare/v1.0.4...v1.0.5) - 2019-12-15 96 | 97 | ### Commits 98 | 99 | - [Tests] use shared travis-ci configs [`af728b2`](https://github.com/inspect-js/is-regex/commit/af728b21c5cc9e41234fb4015594bffdcfff597c) 100 | - [Tests] remove `jscs` [`1b8cfe8`](https://github.com/inspect-js/is-regex/commit/1b8cfe8cfb14820c196775f19d370276e4034791) 101 | - [meta] add `auto-changelog` [`c3131d8`](https://github.com/inspect-js/is-regex/commit/c3131d8ab5d06ea5fa05a4bb2ad28bbfb81668ad) 102 | - [Tests] up to `node` `v8.1`, `v7.10`, `v6.11`, `v4.8`; newer npm fails on older nodes [`660b658`](https://github.com/inspect-js/is-regex/commit/660b6585d1a9607dbdae879b70ce2f6a5684616c) 103 | - [Tests] up to `node` `v9.3`, `v8.9`, `v6.12`; use `nvm install-latest-npm`; pin included builds to LTS [`7c25218`](https://github.com/inspect-js/is-regex/commit/7c25218d540ab17c18e4ae333677c5725806a778) 104 | - [Tests] up to `node` `v12.10`, `v11.15`, `v10.16`, `v8.16`, `v6.17` [`fa95547`](https://github.com/inspect-js/is-regex/commit/fa955478950a5ba0a920010d5daaa29487500b30) 105 | - [meta] remove unused Makefile and associated utilities [`9fd2a29`](https://github.com/inspect-js/is-regex/commit/9fd2a29dc57ed125f3d61e94f6254a9dd8ee0044) 106 | - [Tests] up to `node` `v11.3`, `v10.14`, `v8.14`, `v6.15` [`7f2ac41`](https://github.com/inspect-js/is-regex/commit/7f2ac41ef5dc4d53bfe2fb1c24486c688a2537bd) 107 | - [Tests] up to `node` `v10.0`, `v9.11`, `v8.11`, `v6.14`, `v4.9` [`6fa2b0f`](https://github.com/inspect-js/is-regex/commit/6fa2b0fe171a5b02086a06679a92d989e83a8b8e) 108 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config` [`697e1de`](https://github.com/inspect-js/is-regex/commit/697e1de1c9e69f08e591cc0040d81fdbbde6fe4e) 109 | - [actions] add automatic rebasing / merge commit blocking [`ad86dc9`](https://github.com/inspect-js/is-regex/commit/ad86dc97a52e4f66fbfb3b8c9c78da3963588b54) 110 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `jscs`, `nsp`, `replace`, `semver`, `tape` [`5c99c8e`](https://github.com/inspect-js/is-regex/commit/5c99c8e384d5ce2ef434be5853c301477cf35456) 111 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `replace`, `semver`, `tape` [`bb63686`](https://github.com/inspect-js/is-regex/commit/bb63686a9d0fc586d121549cf484da95edec3b0a) 112 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config@`, `replace`, `semver`, `tape` [`ddf3670`](https://github.com/inspect-js/is-regex/commit/ddf36705e5f7bd29832721e4a23abf06195032c6) 113 | - [Dev Deps] update `tape`, `nsp`, `eslint`, `@ljharb/eslint-config` [`e7b5a62`](https://github.com/inspect-js/is-regex/commit/e7b5a626eef3b9648c7d52d4620ce2e2a98a9ab8) 114 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `covert`, `tape` [`c803db5`](https://github.com/inspect-js/is-regex/commit/c803db5cd94cf9e0a559617adbc1e4c9d22007ff) 115 | - [Tests] switch from `nsp` to `npm audit` [`b7239be`](https://github.com/inspect-js/is-regex/commit/b7239be9da263a0f7066f79d087eaf700a9613e9) 116 | - [Dev Deps] update `eslint`, `nsp`, `semver`, `tape` [`347ee6c`](https://github.com/inspect-js/is-regex/commit/347ee6c67ba0f56b03f21a5abe743658f6515963) 117 | - Only apps should have lockfiles. [`3866575`](https://github.com/inspect-js/is-regex/commit/38665755ecf028061f15816059e26023890a0dc7) 118 | - [Tests] use `npx aud` instead of `nsp` or `npm audit` with hoops [`d099a39`](https://github.com/inspect-js/is-regex/commit/d099a3943eb7e156a3e64fb8b74e11d7c83a4bec) 119 | - [meta] add `funding` field [`741aecd`](https://github.com/inspect-js/is-regex/commit/741aecd92cd49868b3606c8cc99ce299e5f3c7d5) 120 | - [Tests] use `eclint` instead of `editorconfig-tools` [`bc6aa75`](https://github.com/inspect-js/is-regex/commit/bc6aa7539e506788709b96f7bf3d7549850a81c3) 121 | - [Tests] on `node` `v10.1` [`262226f`](https://github.com/inspect-js/is-regex/commit/262226f08fa34dff9a8dffd16daabb3dc6e262eb) 122 | - [Dev Deps] update `eslint` [`31fd719`](https://github.com/inspect-js/is-regex/commit/31fd719dd59a6111ca710cdb0d19a8adadf9b8c6) 123 | - [Deps] update `has` [`e9e25a3`](https://github.com/inspect-js/is-regex/commit/e9e25a3de7e89faaa6aadf5010477074140e8218) 124 | - [Dev Deps] update `replace` [`aeeb968`](https://github.com/inspect-js/is-regex/commit/aeeb968bf5a4fc07f0fa6905f2c699fc563b6c32) 125 | - [Tests] set audit level [`2a6290e`](https://github.com/inspect-js/is-regex/commit/2a6290e78b58bf14b734d7998fe53b4a84db5e44) 126 | - [Tests] remove `nsp` [`fc74c2b`](https://github.com/inspect-js/is-regex/commit/fc74c2bb6970a7f3280abe6eff3b492d77d89c9f) 127 | 128 | ## [v1.0.4](https://github.com/inspect-js/is-regex/compare/v1.0.3...v1.0.4) - 2017-02-18 129 | 130 | ### Fixed 131 | 132 | - [Fix] ensure that `lastIndex` is not mutated [`#3`](https://github.com/inspect-js/is-regex/issues/3) 133 | 134 | ### Commits 135 | 136 | - Update `eslint`, `tape`, `semver`; use my personal shared `eslint` config [`c4a41c3`](https://github.com/inspect-js/is-regex/commit/c4a41c3a8203a3919b01cd0d1b577daadf30a452) 137 | - [Tests] on all node minors; improve test matrix [`58d7508`](https://github.com/inspect-js/is-regex/commit/58d7508a36eb92bd76717486b9e78bde502ffe3e) 138 | - [Dev Deps] update `tape`, `jscs`, `nsp`, `eslint`, `@ljharb/eslint-config`, `semver` [`7290076`](https://github.com/inspect-js/is-regex/commit/729007606e9ed162953d1f5812c37eb06c554ec2) 139 | - Update `covert`, `jscs`, `eslint`, `semver` [`dabc729`](https://github.com/inspect-js/is-regex/commit/dabc729cfc4458264c6f7642004d41dd5c214bfd) 140 | - Update `eslint` [`a946b05`](https://github.com/inspect-js/is-regex/commit/a946b051159396b4311c564880f96e3d00e8b8e2) 141 | - Update `tape`, `jscs`, `eslint`, `@ljharb/eslint-config` [`1744dde`](https://github.com/inspect-js/is-regex/commit/1744dde77526841f216fa2c1c866c5a82b1638c0) 142 | - [Refactor] when try/catch is needed, bail early if the value lacks an own `lastIndex` data property. [`288ad93`](https://github.com/inspect-js/is-regex/commit/288ad93dbfed9f6828de20de67105ee6d6504425) 143 | - Update `editorconfig-tools`, `eslint`, `semver`, `replace` [`4d895c6`](https://github.com/inspect-js/is-regex/commit/4d895c68a0cdbb5803185928963c15147aad0404) 144 | - Update `eslint`, `tape`, `semver` [`f387f03`](https://github.com/inspect-js/is-regex/commit/f387f03b260b56372bfca301d4e79c4067633854) 145 | - All grade A-supported `node`/`iojs` versions now ship with an `npm` that understands `^`. [`55e480f`](https://github.com/inspect-js/is-regex/commit/55e480f407cafb6c21a6c32aef04ccaa3ba4216c) 146 | - [Dev Deps] update `jscs`, `nsp`, `eslint`, `@ljharb/eslint-config`, `semver` [`89d9528`](https://github.com/inspect-js/is-regex/commit/89d95285b364913ebcd8ac7e0872570fe009a5d3) 147 | - [Dev Deps] update `jscs` [`eb222a8`](https://github.com/inspect-js/is-regex/commit/eb222a8435e59909354f3700fd4880e4ce1cb13e) 148 | - [Tests] up to `io.js` `v3.3`, `node` `v4.1` [`c65429c`](https://github.com/inspect-js/is-regex/commit/c65429cea0366508c10ad2ab773af7b83a34fc81) 149 | - Update `nsp`, `eslint` [`c60fbd8`](https://github.com/inspect-js/is-regex/commit/c60fbd8680f7fb3508ec3c5be8ebb788672516c8) 150 | - Update `eslint`, `semver` [`6a62116`](https://github.com/inspect-js/is-regex/commit/6a621168c63616bf004ca8b1f885b4eb8a58a3e5) 151 | - [Tests] on `node` `v7.5`, `v4.7` [`e764651`](https://github.com/inspect-js/is-regex/commit/e764651336f5da5e239e9fe8869f3a3201c19d2b) 152 | - Test up to `io.js` `v2.1` [`3bf326a`](https://github.com/inspect-js/is-regex/commit/3bf326a9bcd530fd16c9fc806e249a68e25ab7e3) 153 | - Test on the latest `io.js` versions. [`693d047`](https://github.com/inspect-js/is-regex/commit/693d0477631c5d7671f6c99eca5594ffffa75771) 154 | - [Refactor] use an early return instead of a ternary. [`31eaca2`](https://github.com/inspect-js/is-regex/commit/31eaca28b7d0aaac0599fe7a569b93b842f8ab16) 155 | - Test on `io.js` `v2.2` [`c18c55a`](https://github.com/inspect-js/is-regex/commit/c18c55aee6358d70531f935e98851e42b698d93c) 156 | - Run `travis-ci` tests on `iojs` and `node` v0.12; speed up builds; allow 0.8 failures. [`a1c237d`](https://github.com/inspect-js/is-regex/commit/a1c237d35f880fe0bcbc9275254611a6a2300aaf) 157 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config` [`aa3ea0f`](https://github.com/inspect-js/is-regex/commit/aa3ea0f148af31d75f7ef8a800412729d82def04) 158 | - [Dev Deps] update `eslint`, `@ljharb/eslint-config` [`d97831d`](https://github.com/inspect-js/is-regex/commit/d97831d0e2ccd3d00d1f7354b7f81e2575f90953) 159 | - [Dev Deps] Update `tape`, `eslint` [`95e6def`](https://github.com/inspect-js/is-regex/commit/95e6defe3178c45dc9df16e474e558979d5f5c05) 160 | - Update `eslint`, `nsp` [`3844c93`](https://github.com/inspect-js/is-regex/commit/3844c935cfe7c52fae0dc74d27e884c417cb4616) 161 | - Update `tape`, `jscs` [`0d6dac8`](https://github.com/inspect-js/is-regex/commit/0d6dac818ed251910171965932f021291919e770) 162 | - Fix tests for faked @@toStringTag [`2ebef9f`](https://github.com/inspect-js/is-regex/commit/2ebef9f0759843e9a063de7a512b46e3e7daea7e) 163 | - Test up to `io.js` `v3.0` [`ec1d2d4`](https://github.com/inspect-js/is-regex/commit/ec1d2d44481fa0fa11448527da8030c99fe47a12) 164 | - [Refactor] bail earlier when the value is falsy. [`a9e333e`](https://github.com/inspect-js/is-regex/commit/a9e333e2ac8912ca05b7e31d30e4eea683c0da4b) 165 | - [Dev Deps] update `tape` [`8cdcaae`](https://github.com/inspect-js/is-regex/commit/8cdcaae07be8c790cdb99849e6076ea7702a4c84) 166 | - Switch from vb.teelaun.ch to versionbadg.es for the npm version badge SVG. [`281c4ef`](https://github.com/inspect-js/is-regex/commit/281c4efeb71c86dd380e741bcaee3f7dbf956151) 167 | - Test on `io.js` `v2.4` [`4d54c68`](https://github.com/inspect-js/is-regex/commit/4d54c68a81b5332a3b76259d8aa8f514be5efd13) 168 | - Test on `io.js` `v2.3` [`23170f5`](https://github.com/inspect-js/is-regex/commit/23170f5cae632d0377de73bd2febc53db8aebbc9) 169 | - Test on `iojs-v1.6` [`4487ad0`](https://github.com/inspect-js/is-regex/commit/4487ad0194a5684223bfa2690da4e0a441f7132a) 170 | 171 | ## [v1.0.3](https://github.com/inspect-js/is-regex/compare/v1.0.2...v1.0.3) - 2015-01-29 172 | 173 | ### Commits 174 | 175 | - Update npm run scripts. [`dc528dd`](https://github.com/inspect-js/is-regex/commit/dc528dd25e775089bc0a3f5a8f7ae7ffc4cdf52a) 176 | - Add toStringTag tests. [`f48a83a`](https://github.com/inspect-js/is-regex/commit/f48a83a78720b78ab60ca586c16f6f3dbcfec825) 177 | - If @@toStringTag is not present, use the old-school Object#toString test. [`50b0ffd`](https://github.com/inspect-js/is-regex/commit/50b0ffd9c7fdbd54aee8cde1b07e680ae84f6a0d) 178 | 179 | ## [v1.0.2](https://github.com/inspect-js/is-regex/compare/v1.0.1...v1.0.2) - 2015-01-29 180 | 181 | ### Commits 182 | 183 | - `make release` [`a1de7ec`](https://github.com/inspect-js/is-regex/commit/a1de7eca4cecc8015fd27804669f8fc61bd16a68) 184 | - Improve optimization by separating the try/catch, and bailing out early when not typeof "object". [`5ab7632`](https://github.com/inspect-js/is-regex/commit/5ab76322a348487fa8b16761e83f6824c3c27d11) 185 | 186 | ## [v1.0.1](https://github.com/inspect-js/is-regex/compare/v1.0.0...v1.0.1) - 2015-01-28 187 | 188 | ### Commits 189 | 190 | - Using my standard jscs.json file [`1f1733a`](https://github.com/inspect-js/is-regex/commit/1f1733ac8433cdcceb25356f86b74136a4477cb9) 191 | - Adding `npm run lint` [`51ea70f`](https://github.com/inspect-js/is-regex/commit/51ea70fa7e461d022f611c195f343ea8d0333d71) 192 | - Use RegExp#exec to test if something is a regex, which works even with ES6 @@toStringTag. [`042c8c7`](https://github.com/inspect-js/is-regex/commit/042c8c734faade9015932b61f1e8ea4f3a93b1b3) 193 | - Adding license and downloads badges [`366d619`](https://github.com/inspect-js/is-regex/commit/366d61965d3a4119126e78e09b2166bbcddd0c5a) 194 | - Use SVG badges instead of PNG [`6a32e4f`](https://github.com/inspect-js/is-regex/commit/6a32e4fc87d7d3a3787b800dd033c9293aead6df) 195 | - Update `tape`, `jscs` [`f1b9462`](https://github.com/inspect-js/is-regex/commit/f1b9462f86d1b69de07176e7f277f668757ba964) 196 | - Update `jscs` [`1bff23f`](https://github.com/inspect-js/is-regex/commit/1bff23ff0fe88c8263e8bf04cf99e290af96d5b0) 197 | - Update `tape`, `jscs` [`c22ea2e`](https://github.com/inspect-js/is-regex/commit/c22ea2e7967f45618deed01ff5ea483f918be216) 198 | - Update `tape`, `jscs` [`b0479db`](https://github.com/inspect-js/is-regex/commit/b0479db99a1b1b872d1618fb0a71f0c74a78b29b) 199 | - Use consistent quotes [`1a6e347`](https://github.com/inspect-js/is-regex/commit/1a6e34730d9270f3f20519139faa4c4e6ec2e1f5) 200 | - Make travis builds faster. [`090a4ea`](https://github.com/inspect-js/is-regex/commit/090a4ea7c5fa709d108d596e3bc304e6ce973dec) 201 | - Update `tape` [`7d76129`](https://github.com/inspect-js/is-regex/commit/7d7612928bdd43230fbd835db71797249ca24f35) 202 | - Lock covert to v1.0.0. [`9a90b03`](https://github.com/inspect-js/is-regex/commit/9a90b03fb390e66f874223a34c58ba2bb109edd3) 203 | - Updating tape [`bfbc7f5`](https://github.com/inspect-js/is-regex/commit/bfbc7f593a007acd0411152bbb55f724dc4ca935) 204 | - Updating jscs [`13ad511`](https://github.com/inspect-js/is-regex/commit/13ad511d80cd67300c2c0c5387fc4b3b423e2768) 205 | - Updating jscs [`cda1945`](https://github.com/inspect-js/is-regex/commit/cda1945d603dfe99e24d5a909a931d366451bc4d) 206 | - Updating jscs [`de96c99`](https://github.com/inspect-js/is-regex/commit/de96c99d4bf5787df671de6df9138b6547a6545b) 207 | - Running linter as part of tests [`2cb6567`](https://github.com/inspect-js/is-regex/commit/2cb656733b1ed0af14ad11fb584006d22de0c69d) 208 | - Updating covert [`a56ae74`](https://github.com/inspect-js/is-regex/commit/a56ae74ec8d5f0473295a8b10519a18580f16624) 209 | - Updating tape [`ffe47f7`](https://github.com/inspect-js/is-regex/commit/ffe47f7fe9cf6d16896b4bdc286bd1d0805d5c49) 210 | 211 | ## [v1.0.0](https://github.com/inspect-js/is-regex/compare/v0.0.0...v1.0.0) - 2014-05-19 212 | 213 | ### Commits 214 | 215 | - Make sure old and unstable nodes don't break Travis [`05da747`](https://github.com/inspect-js/is-regex/commit/05da7478f960dc131ec3ad864e27e8c6b7d74a80) 216 | - toString is a reserved var name in old Opera [`885c48c`](https://github.com/inspect-js/is-regex/commit/885c48c120f921a55f1842b0607d3e7875379821) 217 | - Updating deps [`2ca0e79`](https://github.com/inspect-js/is-regex/commit/2ca0e79a2443ca34d85e8b2ea2e26f55855b74a7) 218 | - Updating tape. [`9678435`](https://github.com/inspect-js/is-regex/commit/96784355611deb0c23b9064be774216d76e3e457) 219 | - Updating covert [`c3bb898`](https://github.com/inspect-js/is-regex/commit/c3bb8985a422e3e0c81f9c43899b6c19a72c755f) 220 | - Updating tape [`7811708`](https://github.com/inspect-js/is-regex/commit/78117089688258b8f939b397b37897b5b3e30f74) 221 | - Testing on node 0.6 again [`dec36ae`](https://github.com/inspect-js/is-regex/commit/dec36ae58a39a3f80e832b702c3e19406363c160) 222 | - Run code coverage as part of tests [`e6f4ebe`](https://github.com/inspect-js/is-regex/commit/e6f4ebec26894543747603f2cb360e839f2ca290) 223 | 224 | ## v0.0.0 - 2014-01-15 225 | 226 | ### Commits 227 | 228 | - package.json [`aa60d43`](https://github.com/inspect-js/is-regex/commit/aa60d43d2c8adb9fdd47f5898e5e1e570bd238d8) 229 | - read me [`861e944`](https://github.com/inspect-js/is-regex/commit/861e944de88e84010eaa662ea9ea9f17c90cff8c) 230 | - Initial commit [`d0cdd71`](https://github.com/inspect-js/is-regex/commit/d0cdd71a637d8490b7ee3eaaf75c7e31d0f9242f) 231 | - Tests. [`b533f74`](https://github.com/inspect-js/is-regex/commit/b533f741a88dff002790fb7af054b2a74e72d4da) 232 | - Implementation. [`3c9a8c0`](https://github.com/inspect-js/is-regex/commit/3c9a8c06994003cdfffeb3620f251f4c4cae7755) 233 | - Travis CI [`742c440`](https://github.com/inspect-js/is-regex/commit/742c4407015f9108875fd108fde137f5245e9e7a) 234 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | The MIT License (MIT) 2 | 3 | Copyright (c) 2014 Jordan Harband 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy of 6 | this software and associated documentation files (the "Software"), to deal in 7 | the Software without restriction, including without limitation the rights to 8 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of 9 | the Software, and to permit persons to whom the Software is furnished to do so, 10 | 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, FITNESS 17 | FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 18 | COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 21 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # is-regex [![Version Badge][2]][1] 2 | 3 | [![github actions][actions-image]][actions-url] 4 | [![coverage][codecov-image]][codecov-url] 5 | [![dependency status][5]][6] 6 | [![dev dependency status][7]][8] 7 | [![License][license-image]][license-url] 8 | [![Downloads][downloads-image]][downloads-url] 9 | 10 | [![npm badge][11]][1] 11 | 12 | Is this value a JS regex? 13 | This module works cross-realm/iframe, and despite ES6 @@toStringTag. 14 | 15 | ## Example 16 | 17 | ```js 18 | var isRegex = require('is-regex'); 19 | var assert = require('assert'); 20 | 21 | assert.notOk(isRegex(undefined)); 22 | assert.notOk(isRegex(null)); 23 | assert.notOk(isRegex(false)); 24 | assert.notOk(isRegex(true)); 25 | assert.notOk(isRegex(42)); 26 | assert.notOk(isRegex('foo')); 27 | assert.notOk(isRegex(function () {})); 28 | assert.notOk(isRegex([])); 29 | assert.notOk(isRegex({})); 30 | 31 | assert.ok(isRegex(/a/g)); 32 | assert.ok(isRegex(new RegExp('a', 'g'))); 33 | ``` 34 | 35 | ## Tests 36 | Simply clone the repo, `npm install`, and run `npm test` 37 | 38 | [1]: https://npmjs.org/package/is-regex 39 | [2]: https://versionbadg.es/inspect-js/is-regex.svg 40 | [5]: https://david-dm.org/inspect-js/is-regex.svg 41 | [6]: https://david-dm.org/inspect-js/is-regex 42 | [7]: https://david-dm.org/inspect-js/is-regex/dev-status.svg 43 | [8]: https://david-dm.org/inspect-js/is-regex#info=devDependencies 44 | [11]: https://nodei.co/npm/is-regex.png?downloads=true&stars=true 45 | [license-image]: https://img.shields.io/npm/l/is-regex.svg 46 | [license-url]: LICENSE 47 | [downloads-image]: https://img.shields.io/npm/dm/is-regex.svg 48 | [downloads-url]: https://npm-stat.com/charts.html?package=is-regex 49 | [codecov-image]: https://codecov.io/gh/inspect-js/is-regex/branch/main/graphs/badge.svg 50 | [codecov-url]: https://app.codecov.io/gh/inspect-js/is-regex/ 51 | [actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/is-regex 52 | [actions-url]: https://github.com/inspect-js/is-regex/actions 53 | -------------------------------------------------------------------------------- /index.d.ts: -------------------------------------------------------------------------------- 1 | declare function isRegex(value: unknown): value is RegExp; 2 | 3 | export = isRegex; 4 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | 'use strict'; 2 | 3 | var callBound = require('call-bound'); 4 | var hasToStringTag = require('has-tostringtag/shams')(); 5 | var hasOwn = require('hasown'); 6 | var gOPD = require('gopd'); 7 | 8 | /** @type {import('.')} */ 9 | var fn; 10 | 11 | if (hasToStringTag) { 12 | /** @type {(receiver: ThisParameterType, ...args: Parameters) => ReturnType} */ 13 | var $exec = callBound('RegExp.prototype.exec'); 14 | /** @type {object} */ 15 | var isRegexMarker = {}; 16 | 17 | var throwRegexMarker = function () { 18 | throw isRegexMarker; 19 | }; 20 | /** @type {{ toString(): never, valueOf(): never, [Symbol.toPrimitive]?(): never }} */ 21 | var badStringifier = { 22 | toString: throwRegexMarker, 23 | valueOf: throwRegexMarker 24 | }; 25 | 26 | if (typeof Symbol.toPrimitive === 'symbol') { 27 | badStringifier[Symbol.toPrimitive] = throwRegexMarker; 28 | } 29 | 30 | /** @type {import('.')} */ 31 | // @ts-expect-error TS can't figure out that the $exec call always throws 32 | // eslint-disable-next-line consistent-return 33 | fn = function isRegex(value) { 34 | if (!value || typeof value !== 'object') { 35 | return false; 36 | } 37 | 38 | // eslint-disable-next-line no-extra-parens 39 | var descriptor = /** @type {NonNullable} */ (gOPD)(/** @type {{ lastIndex?: unknown }} */ (value), 'lastIndex'); 40 | var hasLastIndexDataProperty = descriptor && hasOwn(descriptor, 'value'); 41 | if (!hasLastIndexDataProperty) { 42 | return false; 43 | } 44 | 45 | try { 46 | // eslint-disable-next-line no-extra-parens 47 | $exec(value, /** @type {string} */ (/** @type {unknown} */ (badStringifier))); 48 | } catch (e) { 49 | return e === isRegexMarker; 50 | } 51 | }; 52 | } else { 53 | /** @type {(receiver: ThisParameterType, ...args: Parameters) => ReturnType} */ 54 | var $toString = callBound('Object.prototype.toString'); 55 | /** @const @type {'[object RegExp]'} */ 56 | var regexClass = '[object RegExp]'; 57 | 58 | /** @type {import('.')} */ 59 | fn = function isRegex(value) { 60 | // In older browsers, typeof regex incorrectly returns 'function' 61 | if (!value || (typeof value !== 'object' && typeof value !== 'function')) { 62 | return false; 63 | } 64 | 65 | return $toString(value) === regexClass; 66 | }; 67 | } 68 | 69 | module.exports = fn; 70 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "is-regex", 3 | "version": "1.2.1", 4 | "description": "Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag", 5 | "author": "Jordan Harband ", 6 | "funding": { 7 | "url": "https://github.com/sponsors/ljharb" 8 | }, 9 | "license": "MIT", 10 | "main": "index.js", 11 | "scripts": { 12 | "prepack": "npmignore --auto --commentLines=autogenerated", 13 | "prepublishOnly": "safe-publish-latest", 14 | "prepublish": "not-in-publish || npm run prepublishOnly", 15 | "pretest": "npm run lint", 16 | "test": "npm run tests-only && npm run test:harmony", 17 | "tests-only": "nyc node test", 18 | "test:harmony": "nyc node --harmony --es-staging test", 19 | "test:corejs": "nyc tape test-corejs.js", 20 | "posttest": "npx npm@'>=10.2' audit --production", 21 | "prelint": "eclint check $(git ls-files | xargs find 2> /dev/null | grep -vE 'node_modules|\\.git')", 22 | "lint": "eslint --ext=js,mjs .", 23 | "postlint": "tsc -p . && attw -P", 24 | "version": "auto-changelog && git add CHANGELOG.md", 25 | "postversion": "auto-changelog && git add CHANGELOG.md && git commit --no-edit --amend && git tag -f \"v$(node -e \"console.log(require('./package.json').version)\")\"" 26 | }, 27 | "repository": { 28 | "type": "git", 29 | "url": "git://github.com/inspect-js/is-regex.git" 30 | }, 31 | "bugs": { 32 | "url": "https://github.com/inspect-js/is-regex/issues" 33 | }, 34 | "homepage": "https://github.com/inspect-js/is-regex", 35 | "keywords": [ 36 | "regex", 37 | "regexp", 38 | "is", 39 | "regular expression", 40 | "regular", 41 | "expression" 42 | ], 43 | "dependencies": { 44 | "call-bound": "^1.0.2", 45 | "gopd": "^1.2.0", 46 | "has-tostringtag": "^1.0.2", 47 | "hasown": "^2.0.2" 48 | }, 49 | "devDependencies": { 50 | "@arethetypeswrong/cli": "^0.17.1", 51 | "@ljharb/eslint-config": "^21.1.1", 52 | "@ljharb/tsconfig": "^0.2.2", 53 | "@types/core-js": "^2.5.8", 54 | "@types/for-each": "^0.3.3", 55 | "@types/tape": "^5.6.5", 56 | "auto-changelog": "^2.5.0", 57 | "core-js": "^3.39.0", 58 | "eclint": "^2.8.1", 59 | "encoding": "^0.1.13", 60 | "eslint": "=8.8.0", 61 | "for-each": "^0.3.3", 62 | "in-publish": "^2.0.1", 63 | "npmignore": "^0.3.1", 64 | "nyc": "^10.3.2", 65 | "safe-publish-latest": "^2.0.0", 66 | "tape": "^5.9.0", 67 | "typescript": "^5.8.0-dev.20241129" 68 | }, 69 | "testling": { 70 | "files": "test/index.js", 71 | "browsers": [ 72 | "iexplore/6.0..latest", 73 | "firefox/3.0..6.0", 74 | "firefox/15.0..latest", 75 | "firefox/nightly", 76 | "chrome/4.0..10.0", 77 | "chrome/20.0..latest", 78 | "chrome/canary", 79 | "opera/10.0..latest", 80 | "opera/next", 81 | "safari/4.0..latest", 82 | "ipad/6.0..latest", 83 | "iphone/6.0..latest", 84 | "android-browser/4.2" 85 | ] 86 | }, 87 | "engines": { 88 | "node": ">= 0.4" 89 | }, 90 | "auto-changelog": { 91 | "output": "CHANGELOG.md", 92 | "template": "keepachangelog", 93 | "unreleased": false, 94 | "commitLimit": false, 95 | "backfillLimit": false, 96 | "hideCredit": true 97 | }, 98 | "publishConfig": { 99 | "ignore": [ 100 | ".github/workflows", 101 | "test-corejs.js" 102 | ] 103 | } 104 | } 105 | -------------------------------------------------------------------------------- /test-corejs.js: -------------------------------------------------------------------------------- 1 | 'use strict'; 2 | 3 | require('core-js'); 4 | 5 | require('./test'); 6 | -------------------------------------------------------------------------------- /test/index.js: -------------------------------------------------------------------------------- 1 | 'use strict'; 2 | 3 | var hasToStringTag = require('has-tostringtag/shams')(); 4 | var forEach = require('for-each'); 5 | var test = require('tape'); 6 | var isRegex = require('..'); 7 | 8 | test('not regexes', function (t) { 9 | // @ts-expect-error 10 | t.notOk(isRegex(), 'undefined is not regex'); 11 | t.notOk(isRegex(null), 'null is not regex'); 12 | t.notOk(isRegex(false), 'false is not regex'); 13 | t.notOk(isRegex(true), 'true is not regex'); 14 | t.notOk(isRegex(42), 'number is not regex'); 15 | t.notOk(isRegex('foo'), 'string is not regex'); 16 | t.notOk(isRegex([]), 'array is not regex'); 17 | t.notOk(isRegex({}), 'object is not regex'); 18 | t.notOk(isRegex(function () {}), 'function is not regex'); 19 | t.end(); 20 | }); 21 | 22 | test('@@toStringTag', { skip: !hasToStringTag }, function (t) { 23 | var regex = /a/g; 24 | /** @type {{ toString(): string, valueOf(): RegExp, [Symbol.toStringTag]?: string}} */ 25 | var fakeRegex = { 26 | toString: function () { return String(regex); }, 27 | valueOf: function () { return regex; } 28 | }; 29 | fakeRegex[Symbol.toStringTag] = 'RegExp'; 30 | t.notOk(isRegex(fakeRegex), 'fake RegExp with @@toStringTag "RegExp" is not regex'); 31 | t.end(); 32 | }); 33 | 34 | test('regexes', function (t) { 35 | t.ok(isRegex(/a/g), 'regex literal is regex'); 36 | t.ok(isRegex(new RegExp('a', 'g')), 'regex object is regex'); 37 | t.end(); 38 | }); 39 | 40 | test('does not mutate regexes', function (t) { 41 | t.test('lastIndex is a marker object', function (st) { 42 | var regex = /a/; 43 | var marker = {}; 44 | // @ts-expect-error 45 | regex.lastIndex = marker; 46 | st.equal(regex.lastIndex, marker, 'lastIndex is the marker object'); 47 | st.ok(isRegex(regex), 'is regex'); 48 | st.equal(regex.lastIndex, marker, 'lastIndex is the marker object after isRegex'); 49 | st.end(); 50 | }); 51 | 52 | t.test('lastIndex is nonzero', function (st) { 53 | var regex = /a/; 54 | regex.lastIndex = 3; 55 | st.equal(regex.lastIndex, 3, 'lastIndex is 3'); 56 | st.ok(isRegex(regex), 'is regex'); 57 | st.equal(regex.lastIndex, 3, 'lastIndex is 3 after isRegex'); 58 | st.end(); 59 | }); 60 | 61 | t.end(); 62 | }); 63 | 64 | test('does not perform operations observable to Proxies', { skip: typeof Proxy !== 'function' }, function (t) { 65 | /** @constructor */ 66 | function Handler() { 67 | /** @type (keyof Reflect)[]} */ 68 | this.trapCalls = []; 69 | } 70 | 71 | // eslint-disable-next-line no-extra-parens 72 | forEach(/** @const @type {(keyof Reflect)[]} */ ([ 73 | 'defineProperty', 74 | 'deleteProperty', 75 | 'get', 76 | 'getOwnPropertyDescriptor', 77 | 'getPrototypeOf', 78 | 'has', 79 | 'isExtensible', 80 | 'ownKeys', 81 | 'preventExtensions', 82 | 'set', 83 | 'setPrototypeOf' 84 | ]), function (trapName) { 85 | Handler.prototype[trapName] = function () { 86 | this.trapCalls.push(trapName); 87 | // @ts-expect-error TODO: not sure why this is erroring 88 | return Reflect[trapName].apply(Reflect, arguments); 89 | }; 90 | }); 91 | 92 | t.test('proxy of object', function (st) { 93 | var handler = new Handler(); 94 | // @ts-expect-error Proxy handlers can be any object 95 | var proxy = new Proxy({ lastIndex: 0 }, handler); 96 | 97 | st.equal(isRegex(proxy), false, 'proxy of plain object is not regex'); 98 | st.deepEqual( 99 | handler.trapCalls, 100 | handler.trapCalls.length > 0 ? ['getOwnPropertyDescriptor'] : [], 101 | 'no unexpected proxy traps were triggered' 102 | ); 103 | st.end(); 104 | }); 105 | 106 | t.test('proxy of RegExp instance', function (st) { 107 | var handler = new Handler(); 108 | // @ts-expect-error Proxy handlers can be any object 109 | var proxy = new Proxy(/a/, handler); 110 | 111 | st.equal(isRegex(proxy), false, 'proxy of RegExp instance is not regex'); 112 | st.deepEqual( 113 | handler.trapCalls, 114 | handler.trapCalls.length > 0 ? ['getOwnPropertyDescriptor'] : [], 115 | 'no unexpected proxy traps were triggered' 116 | ); 117 | st.end(); 118 | }); 119 | 120 | t.end(); 121 | }); 122 | -------------------------------------------------------------------------------- /tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "extends": "@ljharb/tsconfig", 3 | "compilerOptions": { 4 | "target": "ES2021", 5 | }, 6 | "exclude": [ 7 | "coverage" 8 | ] 9 | } 10 | --------------------------------------------------------------------------------