A robust & optimized polyfill for the String.prototype.includes
method (previously known as String.prototype.contains
) in ECMAScript 6.
This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.
Other polyfills for String.prototype.includes
are available:
-
https://github.com/paulmillr/es6-shim/blob/d8c4ec246a15e7df55da60b7f9b745af84ca9021/es6-shim.js#L186-L190 by Paul Miller (
fails some testspasses all tests) -
https://github.com/google/traceur-compiler/blob/315bdad05d41de46d25337422d66686d63100d7a/src/runtime/polyfills/String.js#L68-L86 by Google (
fails a lot of testsnow uses this polyfill and passes all tests)
Via npm:
npm install string.prototype.includes
Then, in Node.js:
var includes = require('string.prototype.includes');
In a browser:
<script src="https://bundle.run/string.prototype.includes"></script>
NOTE: It's recommended that you install this module using a package manager such as
npm
, because loading multiple polyfills from a CDN (such asbundle.run
) will lead to duplicated code.
Polyfills + test suites for String.prototype.startsWith
and String.prototype.endsWith
are available, too.
Mathias Bynens |
This polyfill is available under the MIT license.