在YouTube上按住右箭头键时视频加速到2.5倍速，避免与快进功能冲突
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// ==UserScript==
// @name YouTube 按键加速播放
// @name:en YouTube Speed Control
// @namespace https://github.com/landrarwolf/youtube-speed-control
// @version 0.4
// @description 在YouTube上按住右箭头键时视频加速到2.5倍速，避免与快进功能冲突
// @description:en Hold right arrow key to speed up YouTube video to 2.5x, without interfering with the forward function
// @author landrarwolf
// @match https://www.youtube.com/*
// @license MIT
// @supportURL https://github.com/landrarwolf/youtube-speed-control/issues
// @homepageURL https://github.com/landrarwolf/youtube-speed-control
// @grant none
// ==/UserScript==
(function() {
'use strict';
let normalSpeed = 1.0; // 保存正常播放速度
let speedTimeout = null; // 用于延迟处理速度变化
let isSpeedUp = false; // 标记是否处于加速状态
let pressStartTime = 0; // 记录按键开始时间
let speedIndicator = null; // 速度提示元素
// 创建速度提示元素
function createSpeedIndicator() {
const indicator = document.createElement('div');
indicator.style.cssText = `
position: fixed;
top: 20px;
left: 50%;
transform: translateX(-50%);
background-color: rgba(0, 0, 0, 0.8);
color: white;
padding: 8px 16px;
border-radius: 4px;
z-index: 9999;
font-size: 14px;
font-family: Arial, sans-serif;
display: none;
transition: opacity 0.2s;
`;
indicator.textContent = '⚡ 2.5x 加速中';
document.body.appendChild(indicator);
return indicator;
}
// 显示速度提示
function showSpeedIndicator() {
if (!speedIndicator) {
speedIndicator = createSpeedIndicator();
}
speedIndicator.style.display = 'block';
speedIndicator.style.opacity = '1';
}
// 隐藏速度提示
function hideSpeedIndicator() {
if (speedIndicator) {
speedIndicator.style.opacity = '0';
setTimeout(() => {
speedIndicator.style.display = 'none';
}, 200);
}
}
// 监听键盘按下事件
document.addEventListener('keydown', function(event) {
if (event.key === 'ArrowRight') {
if (!event.repeat) {
pressStartTime = Date.now();
speedTimeout = setTimeout(() => {
const video = document.querySelector('video');
if (video) {
normalSpeed = video.playbackRate;
video.playbackRate = 2.5;
isSpeedUp = true;
showSpeedIndicator();
}
event.preventDefault();
event.stopPropagation();
}, 200);
} else {
if (Date.now() - pressStartTime > 200) {
event.preventDefault();
event.stopPropagation();
}
}
}
}, true);
// 监听键盘释放事件
document.addEventListener('keyup', function(event) {
if (event.key === 'ArrowRight') {
const pressDuration = Date.now() - pressStartTime;
if (speedTimeout) {
clearTimeout(speedTimeout);
speedTimeout = null;
}
if (pressDuration < 200) {
return;
}
if (isSpeedUp) {
const video = document.querySelector('video');
if (video) {
video.playbackRate = normalSpeed;
isSpeedUp = false;
hideSpeedIndicator();
}
event.preventDefault();
event.stopPropagation();
}
}
}, true);
})();