获取重定向 url 而不关注

Question

Is there a way to get final redirect url without following it with Fetch API ?
Example:
http://some.link/1 redirects to http://some.link/2

fetch('http://some.link/1', someParams) => get ' http://some.link/2 ' url without request to it.

Answer 1

Yes, you can use the response.url property:

fetch('http://some.link/1').then(function(response) {
  console.log(response.url); // Final URL after redirections
});

The url read-only property of the Response interface contains the URL of the response. The value of the url property will be the final URL obtained after any redirects.

However, this will only work if the initial and all the URLs of the redirection chain have same origin.