Tampermonkey: auto scroll after viewed

autoscroll_after_viewed.js

// ==UserScript==
// @name         Auto Scroll After Viewed
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Click 'Viewed' checkbox easier.
// @author       kuboon
// @match        https://github.com/*/files
// @icon         https://www.google.com/s2/favicons?domain=github.com&sz=256
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    document.addEventListener('change', el => {
        if(el.target.classList.contains('js-reviewed-checkbox') && el.target.checked){
            window.scrollBy({top:62, behavior: 'smooth'})
        }
    })
})();