A robust & optimized ES3-compatible polyfill for the String.prototype.contains
method in ECMAScript 6.
Other polyfills for String.prototype.contains
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)
In a browser:
<script src="contains.js"></script>
Via npm:
npm install string.prototype.contains
Then, in Node.js:
require('string.prototype.contains');
// On Windows and on Mac systems with default settings, case doesn’t matter,
// which allows you to do this instead:
require('String.prototype.contains');
Polyfills + test suites for String.prototype.startsWith
and String.prototype.endsWith
are available, too.
Mathias Bynens |
This polyfill is available under the MIT license.