Unsubsribe all channals of youtube

unsubscribe.js

/*
GO https://www.youtube.com/feed/channels
*/

// https://stackoverflow.com/a/61511955/626898
function waitForElm(selector) {
    return new Promise(resolve => {
        if (document.querySelector(selector)) {
            return resolve(document.querySelector(selector));
        }

        const observer = new MutationObserver(mutations => {
            if (document.querySelector(selector)) {
                resolve(document.querySelector(selector));
                observer.disconnect();
            }
        });

        observer.observe(document.body, {
            childList: true,
            subtree: true
        });
    });
}


while (true) {
    const sb = await waitForElm('#subscribe-button tp-yt-paper-button[subscribed]');
    sb.click();
    const confirmbutton = await waitForElm('#confirm-button a');
    confirmbutton.click();
}