string.prototype.startswith

A robust & optimized `String.prototype.startsWith` polyfill, based on the ECMAScript 6 specification.

MIT 4 个版本

string startswith es6 ecmascript polyfill

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安装

npm install string.prototype.startswith

yarn add string.prototype.startswith

pnpm add string.prototype.startswith

bun add string.prototype.startswith

README

ES6 `String.prototype.startsWith` polyfill

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, 2~~ passes all tests)
https://github.com/google/traceur-compiler/blob/315bdad05d41de46d25337422d66686d63100d7a/src/runtime/polyfills/String.js#L19-L37 by Google (~~fails a lot of tests~~ now uses this polyfill and passes all tests)

Installation

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 as bundle.run) will lead to duplicated code.

Notes

Polyfills + test suites for String.prototype.endsWith and String.prototype.contains are available, too.

For maintainers

How to publish a new release

On the main branch, bump the version number in package.json:
```
npm version patch
```
Instead of patch, use minor or major 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.

Author


Mathias Bynens

License

This polyfill is available under the MIT license.