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# string.prototype.matchall <sup>[![Version Badge][npm-version-svg]][package-url]</sup> [![github actions][actions-image]][actions-url] [![coverage][codecov-image]][codecov-url] [![dependency status][deps-svg]][deps-url] [![dev dependency status][dev-deps-svg]][dev-deps-url] [![License][license-image]][license-url] [![Downloads][downloads-image]][downloads-url] [![npm badge][npm-badge-png]][package-url] ES2020 spec-compliant shim for String.prototype.matchAll. Invoke its "shim" method to shim `String.prototype.matchAll` if it is unavailable or noncompliant. This package implements the [es-shim API](https://github.com/es-shims/api) interface. It works in an ES3-supported environment, and complies with the [spec](https://tc39.es/ecma262/#sec-string.prototype.matchall). Most common usage: ```js const assert = require('assert'); const matchAll = require('string.prototype.matchall'); const str = 'aabc'; const nonRegexStr = 'ab'; const globalRegex = /[ac]/g; const nonGlobalRegex = /[bc]/i; // non-regex arguments are coerced into a global regex assert.deepEqual( [...matchAll(str, nonRegexStr)], [...matchAll(str, new RegExp(nonRegexStr, 'g'))] ); assert.deepEqual([...matchAll(str, globalRegex)], [ Object.assign(['a'], { index: 0, input: str, groups: undefined }), Object.assign(['a'], { index: 1, input: str, groups: undefined }), Object.assign(['c'], { index: 3, input: str, groups: undefined }), ]); assert.throws(() => matchAll(str, nonGlobalRegex)); // non-global regexes throw matchAll.shim(); // will be a no-op if not needed // non-regex arguments are coerced into a global regex assert.deepEqual( [...str.matchAll(nonRegexStr)], [...str.matchAll(new RegExp(nonRegexStr, 'g'))] ); assert.deepEqual([...str.matchAll(globalRegex)], [ Object.assign(['a'], { index: 0, input: str, groups: undefined }), Object.assign(['a'], { index: 1, input: str, groups: undefined }), Object.assign(['c'], { index: 3, input: str, groups: undefined }), ]); assert.throws(() => matchAll(str, nonGlobalRegex)); // non-global regexes throw ``` ## Tests Simply clone the repo, `npm install`, and run `npm test` [package-url]: https://npmjs.com/package/string.prototype.matchall [npm-version-svg]: https://versionbadg.es/es-shims/String.prototype.matchAll.svg [deps-svg]: https://david-dm.org/es-shims/String.prototype.matchAll.svg [deps-url]: https://david-dm.org/es-shims/String.prototype.matchAll [dev-deps-svg]: https://david-dm.org/es-shims/String.prototype.matchAll/dev-status.svg [dev-deps-url]: https://david-dm.org/es-shims/String.prototype.matchAll#info=devDependencies [npm-badge-png]: https://nodei.co/npm/string.prototype.matchall.png?downloads=true&stars=true [license-image]: https://img.shields.io/npm/l/string.prototype.matchall.svg [license-url]: LICENSE [downloads-image]: https://img.shields.io/npm/dm/string.prototype.matchall.svg [downloads-url]: https://npm-stat.com/charts.html?package=string.prototype.matchall [codecov-image]: https://codecov.io/gh/es-shims/String.prototype.matchAll/branch/main/graphs/badge.svg [codecov-url]: https://app.codecov.io/gh/es-shims/String.prototype.matchAll/ [actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/es-shims/String.prototype.matchAll [actions-url]: https://github.com/es-shims/String.prototype.matchAll/actions