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URLJoin

TS JS Deno

Joins all given URL segments together, then normalizes the resulting URL.

Use String.prototype.join('/') to combine URL segments, then a series of String.prototype.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).

typescript
const URLJoin = (...args: string[]) =>
args
.join("/")
.replace(/[\/]+/g, "/")
.replace(/^(.+):\//, "$1://")
.replace(/^file:/, "file:/")
.replace(/\/(\?|&|#[^!])/g, "$1")
.replace(/\?/g, "&")
.replace("&", "?");

const URLJoinWithParams = (url: string, params: AnyObject<string | number>) => {
return URLJoin(url, objectToQueryString(params));
};
typescript
URLJoin("http://www.google.com", "a", "/b/cd", "?foo=123", "?bar=foo"); // 'http://www.google.com/a/b/cd?foo=123&bar=foo'

URLJoinWithParams(URLJoin("http://www.google.com", "a", "/b/cd"), {
foo: 123,
bar: "foo",
}); // "http://www.google.com/a/b/cd?foo=123&bar=foo";