Wanikani Lightning Mode

Eliminates second Enter or Click for correct review answers.
当前为 2015-10-04 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name        Wanikani Lightning Mode
// @namespace   wklightning
// @description Eliminates second Enter or Click for correct review answers.
// @include     https://www.wanikani.com/review/session*
// @version     1.0.0
// @author      Robin Findley
// @copyright   2015+, Robin Findley
// @license     MIT; http://opensource.org/licenses/MIT
// @run-at      document-end
// @grant       none
// ==/UserScript==

// This script was adapted from Kyle Coburn's original "WaniKani Customizer" plugin for Chrome.

(function(){

    var lightning = false;
    var observer;
    var ignore;

    function addStyle(css) {
        var head, style;
        head = document.getElementsByTagName('head')[0];
        if (head) {
            style = document.createElement('style');
            style.setAttribute('type', 'text/css');
            style.textContent = css;
            head.appendChild(style);
            return style;
        }
        return null;
    }

    function main() {
        addStyle('#lightning-mode.active {color:#ff0; opacity:1.0;}');

        lightning = localStorage.getItem('lightning');
        if (lightning === 'false') lightning = false;
        $('#summary-button').append('<a id="lightning-mode" href="#"'+(lightning?' class="active"':'')+'><i class="icon-bolt"></i></a>');
        $('#lightning-mode').click(function() {
            lightning = !lightning;
            console.log('Lightning mode '+(lightning?'en':'dis')+'abled!');
            localStorage.setItem('lightning', lightning);
            $(this).toggleClass('active', lightning);
            return false;
        });
        ignore = false;
        observer = new MutationObserver(function(mutations) {
            mutations.forEach(function(mutation) {
                if (!lightning || ignore) return;
                window.rjf = mutation;
                switch (mutation.target.className) {
                    case 'correct':
                        $('#answer-form button').click();
                        break;
                    case '':
                        break;
                    default:
                        $('#additional-content #option-item-info').click();
                        break;
                }

                // Ignore additional changes for 100ms
                ignore = true;
                setTimeout(function(){ignore = false;}, 100);
            });
        });
        observer.observe(document.querySelector('#answer-form fieldset'), {attributes: true, subtree: true, attributeFilter: ['class']});
    }

    // Run main upon load.
    if (document.readyState === 'complete')
        main();
    else
        window.addEventListener("load", main, false);

}).call({});