A good way to redirect with a POST request?

Question

I need to redirect a user to an external site though a POST request.

The only option I figured out is to do it submit a form through JavaScript.

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Any id

Answer 1

Just set HTML form's action URL to the particular external site.

Here's an SSCCE, just copy'n'paste'n'run it:

You'll see that Stackoverflow has good CSRF protection ;)