Tampermonkey/Greasemonkey UserScript to Allow Approving Closed GitHub PR

approve-closed-github-pr.user.js

// ==UserScript==
// @name         Approve Closed GitHub PR
// @icon         https://raw.githubusercontent.com/xthexder/wide-github/master/icons/icon.png
// @namespace    https://gist.github.com/lucasrangit/792324f4695babc701cdd64e18a63f4b
// @version      1.2
// @description  A closed PR does not allow approval via the Web GUI. This adds the approval event back when submitting a retroactive review.
// @author       Lucas Magasweran
// @match        https://*.github.*/*/pull/*
// @grant        none
// @require      http://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js
// @require      https://gist.github.com/raw/2625891/waitForKeyElements.js
// ==/UserScript==
(function() {
    'use strict';

    function add_approve_to_submit_review_button() {
        // expand the Review changes button so that the the approve can be added
        const review_buttons = document.getElementsByClassName("details-reset details-overlay js-dropdown-details");
        console.log(review_buttons);
        for (const a of review_buttons) {
            a.setAttribute("open", "");
        }

        const elms = document.getElementsByName("pull_request_review[event]");

        // length is 1 when PR is closed
        if (elms.length == 1) {
            elms[0].insertAdjacentHTML("afterend", '<input type="hidden" name="pull_request_review[event]" value="approve">');

            // Update button text to signal that review will also approve
            for (const a of document.querySelectorAll("button")) {
                if (a.textContent.includes("Submit review")) {
                    a.textContent = "Submit review + Approve";
                }
            }
        }

        // collapse the Review changes button
        for (const a of review_buttons) {
            a.removeAttribute("open");
        }
    }

    // run if PR is closed
    if (document.getElementsByClassName("State State--red")) {
        // wait for Review button on "Files changed" tab
        waitForKeyElements (
            ".details-reset.details-overlay.js-dropdown-details",
            add_approve_to_submit_review_button
        );
    }
})();