javascript - URL() constructor add %20 in host for chrome but its not valid in firefox

Question

I am using URL() constructor to check if URL is a valid one. https://developer.mozilla.org/en-US/docs/Web/API/URL/URL

If i run below code in chrome it added %20 after // in https:// s

let url = new URL('https:// s');
console.log(url);

Answer 1

Chrome is buggy here, the specs state that

1. If url is not given:

   1. Set url to a new URL.

   2. If input contains any leading or trailing C0 control or space, validation error.

So this should be a validation error.

Unfortunately I don't know any other way to do the same (using an anchor exposes the same bug), maybe you could browserify node's implementation, but I didn't try myself.