195 lines
4.1 KiB
Markdown
195 lines
4.1 KiB
Markdown
# normalize-url [](https://travis-ci.org/sindresorhus/normalize-url) [](https://coveralls.io/github/sindresorhus/normalize-url?branch=master)
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> [Normalize](https://en.wikipedia.org/wiki/URL_normalization) a URL
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Useful when you need to display, store, deduplicate, sort, compare, etc, URLs.
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## Install
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```
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$ npm install normalize-url
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```
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## Usage
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```js
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const normalizeUrl = require('normalize-url');
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normalizeUrl('sindresorhus.com');
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//=> 'http://sindresorhus.com'
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normalizeUrl('HTTP://xn--xample-hva.com:80/?b=bar&a=foo');
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//=> 'http://êxample.com/?a=foo&b=bar'
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```
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## API
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### normalizeUrl(url, [options])
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#### url
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Type: `string`
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URL to normalize.
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#### options
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Type: `Object`
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##### defaultProtocol
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Type: `string`<br>
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Default: `http:`
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##### normalizeProtocol
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Type: `boolean`<br>
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Default: `true`
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Prepends `defaultProtocol` to the URL if it's protocol-relative.
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```js
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normalizeUrl('//sindresorhus.com:80/');
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//=> 'http://sindresorhus.com'
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normalizeUrl('//sindresorhus.com:80/', {normalizeProtocol: false});
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//=> '//sindresorhus.com'
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```
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##### forceHttp
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Type: `boolean`<br>
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Default: `false`
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Normalizes `https:` URLs to `http:`.
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```js
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normalizeUrl('https://sindresorhus.com:80/');
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//=> 'https://sindresorhus.com'
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normalizeUrl('https://sindresorhus.com:80/', {normalizeHttps: true});
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//=> 'http://sindresorhus.com'
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```
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##### forceHttps
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Type: `boolean`<br>
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Default: `false`
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Normalizes `http:` URLs to `https:`.
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```js
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normalizeUrl('https://sindresorhus.com:80/');
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//=> 'https://sindresorhus.com'
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normalizeUrl('http://sindresorhus.com:80/', {normalizeHttp: true});
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//=> 'https://sindresorhus.com'
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```
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This option can't be used with the `forceHttp` option at the same time.
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##### stripHash
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Type: `boolean`<br>
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Default: `true`
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Removes hash from the URL.
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```js
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normalizeUrl('sindresorhus.com/about.html#contact');
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//=> 'http://sindresorhus.com/about.html'
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normalizeUrl('sindresorhus.com/about.html#contact', {stripHash: false});
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//=> 'http://sindresorhus.com/about.html#contact'
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```
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##### stripWWW
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Type: `boolean`<br>
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Default: `true`
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Removes `www.` from the URL.
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```js
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normalizeUrl('http://www.sindresorhus.com/about.html#contact');
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//=> 'http://sindresorhus.com/about.html#contact'
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normalizeUrl('http://www.sindresorhus.com/about.html#contact', {stripWWW: false});
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//=> 'http://www.sindresorhus.com/about.html#contact'
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```
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##### removeQueryParameters
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Type: `Array<RegExp|string>`<br>
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Default: `[/^utm_\w+/i]`
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Removes query parameters that matches any of the provided strings or regexes.
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```js
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normalizeUrl('www.sindresorhus.com?foo=bar&ref=test_ref', {
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removeQueryParameters: ['ref']
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});
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//=> 'http://sindresorhus.com/?foo=bar'
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```
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##### removeTrailingSlash
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Type: `boolean`<br>
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Default: `true`
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Removes trailing slash.
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**Note:** Trailing slash is always removed if the URL doesn't have a pathname.
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```js
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normalizeUrl('http://sindresorhus.com/redirect/');
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//=> 'http://sindresorhus.com/redirect'
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normalizeUrl('http://sindresorhus.com/redirect/', {removeTrailingSlash: false});
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//=> 'http://sindresorhus.com/redirect/'
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normalizeUrl('http://sindresorhus.com/', {removeTrailingSlash: false});
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//=> 'http://sindresorhus.com'
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```
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##### removeDirectoryIndex
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Type: `boolean` `Array<RegExp|string>`<br>
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Default: `false`
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Removes the default directory index file from path that matches any of the provided strings or regexes. When `true`, the regex `/^index\.[a-z]+$/` is used.
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```js
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normalizeUrl('www.sindresorhus.com/foo/default.php', {
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removeDirectoryIndex: [/^default\.[a-z]+$/]
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});
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//=> 'http://sindresorhus.com/foo'
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```
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##### sortQueryParameters
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Type: `boolean`<br>
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Default: `true`
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Sorts the query parameters alphabetically by key.
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```js
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normalizeUrl('www.sindresorhus.com?b=two&a=one&c=three', {
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sortQueryParameters: false
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});
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//=> 'http://sindresorhus.com/?b=two&a=one&c=three'
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```
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## Related
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- [compare-urls](https://github.com/sindresorhus/compare-urls) - Compare URLs by first normalizing them
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## License
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MIT © [Sindre Sorhus](https://sindresorhus.com)
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