Joins all given URL segments together, then normalizes the resulting URL.
- Use
Array.prototype.join()
to combine URL segments. - Use a series of
String.prototype.replace()
calls with various regular expressions 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).
代码实现
const URLJoin = (...args) =>
args
.join('/')
.replace(/[\/]+/g, '/')
.replace(/^(.+):\//, '$1://')
.replace(/^file:/, 'file:/')
.replace(/\/(\?|&|#[^!])/g, '$1')
.replace(/\?/g, '&')
.replace('&', '?');
URLJoin('http://www.google.com', 'a', '/b/cd', '?foo=123', '?bar=foo');
// 'http://www.google.com/a/b/cd?foo=123&bar=foo'