Adds a styled button to copy the YouTube video transcript, with a timestamp toggle
// ==UserScript==
// @name YouTube Transcript Copier
// @match https://www.youtube.com/watch*
// @license MIT
// @grant none
// @version 1.0
// @author Amir Tehrani
// @description Adds a styled button to copy the YouTube video transcript, with a timestamp toggle
// @namespace https://greasyfork.org/
// @icon https://www.google.com/s2/favicons?domain=youtube.com
// ==/UserScript==
(function() {
'use strict';
let observer = null;
let currentURL = window.location.href;
let insertionAttempts = 0;
const maxAttempts = 20;
let retryInterval = null;
let includeTimestamps = false; // Default: no timestamps
let copyButton = null;
let buttonTextNode = null;
let transcriptPanelTimeout = null; // Timeout for panel loading
let transcriptButtonTimeout = null; // Timeout for the "Show transcript" button
function createTranscriptButton() {
if (document.getElementById('show-transcript-button')) {
return true;
}
copyButton = document.createElement('button');
copyButton.id = 'show-transcript-button';
copyButton.classList.add('yt-transcript-button');
copyButton.setAttribute('aria-label', 'Copy Transcript'); // Accessibility
buttonTextNode = document.createTextNode('Copy Transcript');
copyButton.appendChild(buttonTextNode);
const timestampSpan = document.createElement('span');
timestampSpan.id = 'timestamp-toggle';
timestampSpan.textContent = ' (No Time)';
timestampSpan.style.cssText = `
font-size: 0.75em;
margin-left: 6px;
color: rgba(255, 255, 255, 0.7);
cursor: pointer;
user-select: none;
border: 1px solid rgba(255, 255, 255, 0.3);
border-radius: 12px;
padding: 3px 6px;
display: inline-block;
vertical-align: middle;
transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
background-color: rgba(0, 0, 0, 0.1);
`;
timestampSpan.addEventListener('mouseover', function() {
this.style.borderColor = 'rgba(255, 255, 255, 0.9)';
this.style.backgroundColor = 'rgba(0, 0, 0, 0.2)';
});
timestampSpan.addEventListener('mouseout', function() {
this.style.borderColor = includeTimestamps ? 'white' : 'rgba(255, 255, 255, 0.3)';
this.style.backgroundColor = includeTimestamps ? 'rgba(0,0,0, 0.4)' : 'rgba(0, 0, 0, 0.1)';
});
copyButton.appendChild(timestampSpan);
timestampSpan.addEventListener('click', function(event) {
event.stopPropagation(); // Prevent main button click
includeTimestamps = !includeTimestamps;
this.textContent = includeTimestamps ? ' (Time)' : ' (No Time)';
this.style.color = includeTimestamps ? 'white' : 'rgba(255, 255, 255, 0.7)';
this.style.borderColor = includeTimestamps ? 'white' : 'rgba(255, 255, 255, 0.3)';
this.style.backgroundColor = includeTimestamps ? 'rgba(0,0,0, 0.4)' : 'rgba(0, 0, 0, 0.1)';
});
copyButton.addEventListener('click', handleCopyClick);
function insertButton() {
const potentialTargets = [
'#description #top-level-buttons-computed',
'#top-row.ytd-watch-metadata',
'#above-the-fold',
'#meta-contents',
'#primary-inner'
];
for (const targetSelector of potentialTargets) {
const targetElement = document.querySelector(targetSelector);
if (targetElement) {
targetElement.parentNode.insertBefore(copyButton, targetElement.nextSibling);
injectStyles();
return true;
}
}
return false;
}
return insertButton();
}
function handleCopyClick() {
updateButtonText('Copy Transcript');
const moreActionsButton = document.querySelector('button[aria-label="More actions"]');
if (moreActionsButton) {
moreActionsButton.click();
}
const buttonIntervalId = setInterval(() => {
const transcriptButton = document.querySelector('[aria-label="Show transcript"]');
if (transcriptButton) {
transcriptButton.click();
clearInterval(buttonIntervalId);
clearTimeout(transcriptButtonTimeout);
const panelIntervalId = setInterval(() => {
const transcriptPanel = document.querySelector('ytd-engagement-panel-section-list-renderer[target-id="engagement-panel-searchable-transcript"] #content');
if (transcriptPanel && transcriptPanel.querySelector('ytd-transcript-segment-renderer')) {
clearInterval(panelIntervalId);
clearTimeout(transcriptPanelTimeout);
copyTranscriptText(transcriptPanel);
}
}, 100);
transcriptPanelTimeout = setTimeout(() => {
clearInterval(panelIntervalId);
console.error("Transcript panel or segments not found after timeout.");
if (copyButton) {
updateButtonText("Transcript Not Found");
copyButton.style.backgroundColor = "rgba(220, 53, 69, 0.8)";
}
}, 15000);
}
}, 250);
transcriptButtonTimeout = setTimeout(() => {
clearInterval(buttonIntervalId);
if (copyButton) {
updateButtonText("Transcript Not Found")
copyButton.style.backgroundColor = "rgba(220, 53, 69, 0.8)";
}
console.error("Transcript button not found after timeout.");
}, 10000);
}
function copyTranscriptText(transcriptPanel) {
if (!transcriptPanel) {
console.error("Transcript container not found.");
updateButtonText("Error");
return;
}
let transcriptText = "";
if (includeTimestamps) {
transcriptPanel.querySelectorAll('ytd-transcript-segment-renderer').forEach(line => {
const timestampElement = line.querySelector('.segment-timestamp');
const textElement = line.querySelector('.segment-text');
if (timestampElement && textElement) {
transcriptText += timestampElement.textContent.trim() + " " + textElement.textContent.trim() + "\n";
}
});
} else {
transcriptPanel.querySelectorAll('.segment-text').forEach(segment => {
transcriptText += segment.textContent.trim() + " ";
});
}
navigator.clipboard.writeText(transcriptText)
.then(() => {
updateButtonText("Copied!");
})
.catch(err => {
console.error('Failed to copy transcript:', err);
if (copyButton) {
updateButtonText("Copy Failed");
copyButton.style.backgroundColor = "rgba(220, 53, 69, 0.8)";
}
});
}
function updateButtonText(text) {
if (copyButton && buttonTextNode) {
buttonTextNode.textContent = text;
if (text === "Copied!") {
copyButton.style.backgroundColor = "rgba(40, 167, 69, 0.9)";
setTimeout(() => {
buttonTextNode.textContent = 'Copy Transcript';
copyButton.style.backgroundColor = 'rgba(0, 123, 255, 0.8)';
const timestampToggle = document.getElementById('timestamp-toggle');
timestampToggle.textContent = includeTimestamps ? ' (Time)' : ' (No Time)';
timestampToggle.style.color = includeTimestamps ? 'white' : 'rgba(255, 255, 255, 0.7)';
timestampToggle.style.borderColor = includeTimestamps ? 'white' : 'rgba(255, 255, 255, 0.3)';
timestampToggle.style.backgroundColor = includeTimestamps ? 'rgba(0,0,0, 0.4)' : 'rgba(0, 0, 0, 0.1)';
}, 1500);
} else if (text.startsWith("Error") || text === "Copy Failed" || text === "Transcript Not Found") {
copyButton.style.backgroundColor = "rgba(220, 53, 69, 0.8)";
}
}
}
function injectStyles() {
if (document.getElementById('yt-transcript-button-styles')) return;
const style = document.createElement('style');
style.id = 'yt-transcript-button-styles';
style.textContent = `
.yt-transcript-button {
background-color: rgba(0, 123, 255, 0.8);
border: none;
color: white;
padding: 10px 18px;
text-align: center;
text-decoration: none;
display: inline-flex;
align-items: center;
font-size: 15px;
margin: 4px 2px;
cursor: pointer;
border-radius: 24px;
transition: all 0.2s ease;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
font-family: 'Roboto', sans-serif;
font-weight: 500;
position: relative;
overflow: hidden;
will-change: transform, box-shadow, background-color;
}
.yt-transcript-button:hover {
background-color: rgba(0, 90, 180, 0.9);
box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
transform: translateY(-1px);
}
.yt-transcript-button:focus {
outline: none;
box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.3);
}
.yt-transcript-button:active {
background-color: rgba(0, 60, 120, 0.9);
box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
transform: translateY(1px);
}
.yt-transcript-button::before {
content: '';
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: radial-gradient(circle at 0 0, rgba(255, 255, 255, 0.4) 10%, transparent 10.01%);
background-size: 0 0;
opacity: 0;
pointer-events: none;
transition: background-size 0.4s ease, opacity 0.4s ease, background-position 0.4s ease;
}
.yt-transcript-button:active::before {
background-size: 200% 200%;
opacity: 1;
transition: background-size 0.4s ease, opacity 0.4s ease;
}
`;
document.head.appendChild(style);
copyButton.addEventListener('mousedown', function(event) {
const rect = copyButton.getBoundingClientRect();
const x = event.clientX - rect.left;
const y = event.clientY - rect.top;
copyButton.style.setProperty('--ripple-x', x + 'px');
copyButton.style.setProperty('--ripple-y', y + 'px');
copyButton.style.background = `radial-gradient(circle at var(--ripple-x) var(--ripple-y), rgba(255, 255, 255, 0.4) 10%, transparent 10.01%)`;
});
copyButton.addEventListener('mouseup', function(event){
copyButton.style.background = null;
});
copyButton.addEventListener("mouseleave", function(event) {
copyButton.style.background = null;
});
}
function attemptButtonCreation() {
insertionAttempts++;
if (createTranscriptButton() || insertionAttempts >= maxAttempts) {
clearInterval(retryInterval);
retryInterval = null;
if (insertionAttempts >= maxAttempts) {
console.error('Could not insert the button after multiple attempts.');
}
}
}
function setupObserver() {
if (observer) observer.disconnect();
observer = new MutationObserver(handleMutations);
observer.observe(document.body, { childList: true, subtree: true });
}
function handleMutations(mutations) {
if (window.location.href !== currentURL) {
currentURL = window.location.href;
resetState();
startProcess();
}
}
function resetState() {
if (document.getElementById('show-transcript-button')) {
document.getElementById('show-transcript-button').remove();
}
insertionAttempts = 0;
if (retryInterval) {
clearInterval(retryInterval);
retryInterval = null;
}
clearTimeout(transcriptPanelTimeout);
clearTimeout(transcriptButtonTimeout);
transcriptPanelTimeout = null;
transcriptButtonTimeout = null;
if (observer) {
observer.disconnect();
observer = null;
}
copyButton = null;
buttonTextNode = null;
}
function startProcess() {
if (!createTranscriptButton()) {
retryInterval = setInterval(attemptButtonCreation, 500);
}
setupObserver();
}
startProcess();
})();