Tampermonkey Script for あにてれ (https://ch.ani.tv): Add autoplay feature and keybindings (Space: Pause & Play / F: Toggle Fullscreen)

script.js

// ==UserScript==
// @name         Add autoplay feature and keybindings (Space: Pause & Play / F: Toggle Fullscreen)
// @namespace    http://github.com/shuuji3
// @version      0.1
// @description  Add autoplay feature and keybindings (Space: Pause & Play / F: Toggle Fullscreen)
// @author       You
// @match        https://ch.ani.tv/episodes/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // Autoplay video
    const firstPlayButton = document.querySelector('#player-ctrl-play');
    firstPlayButton.click();

    // Pause & Play
    function pauseAndPlay(e) {
        e.preventDefault();
        const isPlaying = !!document.querySelector('.vjs-playing');
        const pauseButton = document.querySelector('#player-ctrl-pause');
        const playButton = document.querySelector('#player-ctrl-play');
        if (isPlaying) {
            pauseButton.click();
        } else {
            playButton.click();
        }
    }

    // Toggle fullscreen
    function toggleFullscreen() {
        const isFullscreen = !!document.querySelector('.vjs-playing');
        const fullscreenButton = document.querySelector('#player-ctrl-full-screen');
        const fullscreenOffButton = document.querySelector('#player-ctrl-full-screen-off');
    }

    window.addEventListener('keydown', e => {
        if (e.code === 'Space') {
            pauseAndPlay(e);
        } else if (e.code === 'KeyF') {
            toggleFullscreen();
        }
    });
})();