Displays a badge on the volume button showing the current volume percentage.
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// ==UserScript==
// @name YouTube - Volume Badge
// @name:fr YouTube - Badge de Volume
// @name:es YouTube - Indicador de volumen
// @name:de YouTube - Lautstärke-Anzeige
// @name:it YouTube - Etichetta del volume
// @name:zh-CN YouTube - 音量徽章
// @namespace https://gist.github.com/4lrick/89f4efb2fb0a3c48cc3411edeb6a7339
// @version 1.1
// @description Displays a badge on the volume button showing the current volume percentage.
// @description:fr Affiche un badge sur le bouton de volume indiquant le pourcentage actuel.
// @description:es Muestra una insignia en el botón de volumen con el porcentaje actual.
// @description:de Zeigt ein Abzeichen auf dem Lautstärkeknopf mit dem aktuellen Prozentsatz an.
// @description:it Mostra un'etichetta sul pulsante del volume con la percentuale attuale.
// @description:zh-CN 在音量按钮上显示当前音量百分比的徽章。
// @author 4lrick
// @match https://www.youtube.com/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @grant none
// @license GPL-3.0-only
// ==/UserScript==
(function () {
'use strict';
const VOLUME_BADGE_ID = 'ytp-volume-badge';
const VOLUME_BADGE_STYLE = {
position: 'absolute',
padding: '1px 3px',
backgroundColor: 'var(--yt-spec-red-indicator, #e1002d)',
fontFamily: 'Verdana,sans-serif',
fontWeight: 'bold',
color: 'white',
textShadow: '0 2px 0 rgba(0,0,0,.6)',
backgroundImage: 'none',
borderRadius: '1.5px',
height: 'auto',
width: 'auto',
lineHeight: 'normal',
transition: 'opacity 0.2s ease',
opacity: '0',
};
function createBadge() {
const badge = document.createElement('div');
badge.id = VOLUME_BADGE_ID;
Object.assign(badge.style, VOLUME_BADGE_STYLE);
return badge;
}
function injectBadge() {
const muteBtn = document.querySelector('.ytp-mute-button');
if (!muteBtn || document.getElementById(VOLUME_BADGE_ID)) return;
const badge = createBadge();
muteBtn.style.position = 'relative';
muteBtn.appendChild(badge);
return badge;
}
function updateBadgeSize() {
const badge = document.getElementById(VOLUME_BADGE_ID);
if (!badge) return;
const fullscreenEl = document.fullscreenElement;
const video = document.querySelector('video');
const isVideoFullscreen = fullscreenEl && fullscreenEl.contains(video);
const zoomFactor = window.devicePixelRatio || 1;
if (isVideoFullscreen) {
badge.style.right = `${12 / zoomFactor}px`;
badge.style.top = `${12 / zoomFactor}px`;
badge.style.fontSize = `${10 / zoomFactor}px`;
} else {
badge.style.right = `${8 / zoomFactor}px`;
badge.style.top = `${8 / zoomFactor}px`;
badge.style.fontSize = `${10 / zoomFactor}px`;
}
}
function displayBadge(player) {
let badge = document.getElementById(VOLUME_BADGE_ID) || injectBadge();
if (!badge || !player) return;
const volume = player.getVolume();
const isMuted = player.isMuted() || volume === 0;
updateBadgeSize();
badge.textContent = volume;
badge.style.opacity = isMuted ? '0' : '1';
}
function checkVideoExists() {
const video = document.querySelector('video');
const player = document.getElementById('movie_player');
if (!video || !player) return;
displayBadge(player);
video.addEventListener('volumechange', () => {
displayBadge(player);
});
observer.disconnect();
}
const observer = new MutationObserver(checkVideoExists);
observer.observe(document.body, { childList: true, subtree: true });
window.addEventListener('resize', updateBadgeSize);
})();