GitHub Mark Files Viewed Function

github_markViewed_func.user.js

// ==UserScript==
// @name         GitHub viewed files utility
// @namespace    https://gist.github.com/gregory-seidman/dd8b7a93f4603ef3e484c82d45809a95
// @version      1.0.0
// @description  Add function markViewed(CSS attribute pattern on value) to mark files viewed by file pattern
// @downloadURL  https://gist.github.com/gregory-seidman/d3d0cae4ea69e8c324b944f4bb165dfa/raw/github_markViewed_func.user.js
// @updateURL    https://gist.github.com/gregory-seidman/d3d0cae4ea69e8c324b944f4bb165dfa/raw/github_markViewed_func.user.js
// @author       Gregory Seidman
// @match        https://github.com/*/pull/*/files*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=github.com
// @grant        unsafeWindow
// ==/UserScript==

(function(win) {
    'use strict';

    // example pattern for HTML files: 'value$=".html"'
    win.markViewed = function(pattern) {
        Array.prototype.map.call(win.document.querySelectorAll(`form input[type="hidden"][${pattern}]`),
                                 e => e.parentNode.querySelector('label input[type="checkbox"]'))
            .filter(e => e && !e.checked)
            .forEach(e => e.click())
    }
})(unsafeWindow);