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40 lines
1.0 KiB
Markdown
40 lines
1.0 KiB
Markdown
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# isurl [![NPM Version][npm-image]][npm-url] [![Build Status][travis-image]][travis-url]
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> Checks whether a value is a WHATWG [`URL`](https://developer.mozilla.org/en/docs/Web/API/URL).
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Works cross-realm/iframe and despite @@toStringTag.
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## Installation
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[Node.js](http://nodejs.org/) `>= 4` is required. To install, type this at the command line:
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```shell
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npm install isurl
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```
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## Usage
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```js
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const isURL = require('isurl');
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isURL('http://domain/'); //-> false
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isURL(new URL('http://domain/')); //-> true
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```
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Optionally, acceptance can be extended to incomplete `URL` implementations that lack `searchParams` (which are common in many modern web browsers):
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```js
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const url = new URL('http://domain/?query');
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console.log(url.searchParams); //-> undefined
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isURL.lenient(url); //-> true
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```
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[npm-image]: https://img.shields.io/npm/v/isurl.svg
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[npm-url]: https://npmjs.org/package/isurl
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[travis-image]: https://img.shields.io/travis/stevenvachon/isurl.svg
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[travis-url]: https://travis-ci.org/stevenvachon/isurl
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