javascript - How to make a script redirect only once every time an appropriate page loads?

Question

I'm writing a Tampermonkey script that I want to use to redirect from youtube.com/* to a YouTube channel address.

window.addEventListener ("load", LocalMain, false);

function LocalMain () {
    location.replace("https://www.youtube.com/channel/*");
}

When the script is running it redirects to the channel URL but then keeps running and continuously redirects.

Answer 1

You could check to see if the location contains 'channel', then return before you change the location.

window.addEventListener ("load", LocalMain, false);

function LocalMain () {
    if(location.href.indexOf('channel') === -1) return;
    location.replace("https://www.youtube.com/channel/*");
}