jpdb_yes_keep_going.user.js

// ==UserScript==
// @name         JPDB Yes, keep going!
// @namespace    http://tampermonkey.net/
// @version      0.7
// @description  Makes "Yes, keep going!" the default button.
// @author       boccato
// @match        https://jpdb.io/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=jpdb.io
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    console.log("testing...")
    let buttons = document.querySelectorAll('input[type=submit]')
//     if (buttons && buttons.length == 2) {
    if (document.location.pathname === "/review") {
        for (const btn of buttons) {
            if (btn.attributes.getNamedItem('autofocus')) {
                btn.attributes.removeNamedItem('autofocus')
            }
        }
//         setTimeout(() => buttons[0].focus({focusVisible: true}), 100)
    }
    // /review
    let btnHard = document.querySelector('input[type=submit][value="✔ Hard"]')
    if (btnHard) {
        console.log("hard...")
        setTimeout(() => btnHard.focus({focusVisible: true}), 100)
    }
    let btnShowAnswer = document.querySelector('input[type=submit][value="Show answer"]')
    if (btnShowAnswer) {
        setTimeout(() => btnShowAnswer.focus({focusVisible: true}), 100)
    }
    let btnYesKeepGoing = document.querySelector('input[type=submit][value="Yes, keep going!"]')
    if (btnYesKeepGoing) {
        setTimeout(() => btnYesKeepGoing.focus({focusVisible: true}), 100)
    }
    // / and /learn
    let btn = document.querySelector('input[type=submit][value="Start reviewing"]')
    if (btn) {
        setTimeout(() => btn.focus({focusVisible: true}), 100)
    }
})();