A robust & optimized polyfill for the String.prototype.startsWith
method 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.startsWith
are available:
-
https://github.com/paulmillr/es6-shim/blob/d8c4ec246a15e7df55da60b7f9b745af84ca9021/es6-shim.js#L166-L173 by Paul Miller (
fails some tests: 1, 2passes all tests) -
https://github.com/google/traceur-compiler/blob/315bdad05d41de46d25337422d66686d63100d7a/src/runtime/polyfills/String.js#L19-L37 by Google (
fails a lot of testsnow uses this polyfill and passes all tests)
Via npm:
npm install string.prototype.startswith
Then, in Node.js:
var startsWith = require('string.prototype.startswith');
In a browser:
<script src="https://bundle.run/string.prototype.startswith"></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.endsWith
and String.prototype.contains
are available, too.
-
On the
main
branch, bump the version number inpackage.json
:npm version patch
Instead of
patch
, useminor
ormajor
as needed.Note that this produces a Git commit + tag.
-
Push the release commit and tag:
git push && git push --tags
Our CI then automatically publishes the new release to npm.
Mathias Bynens |
This polyfill is available under the MIT license.