21 lines
748 B
Markdown
21 lines
748 B
Markdown
### URLJoin
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Joins all given URL segments together, then normalizes the resulting URL.
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Use `String.join('/')` to combine URL segments, then a series of `String.replace()` calls with various regexps to normalize the resulting URL (remove double slashes, add proper slashes for protocol, remove slashes before parameters, combine parameters with `'&'` and normalize first parameter delimiter).
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```js
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const URLJoin = (...args) =>
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args.join('/')
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.replace(/[\/]+/g,'/')
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.replace(/^(.+):\//,'$1://')
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.replace(/^file:/,'file:/')
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.replace(/\/(\?|&|#[^!])/g, '$1')
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.replace(/\?/g,'&')
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.replace('&','?');
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```
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```js
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URLJoin('http://www.google.com', 'a', '/b/cd', '?foo=123', '?bar=foo'); // 'http://www.google.com/a/b/cd?foo=123&bar=foo'
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```
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