Automatically scrolls to a specified text within a YouTube grid. Search box in masthead, search on button click only, stop button, animated border highlighting, and no results message. Improved robustness, accessibility, and user experience.
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// ==UserScript==
// @name YouTube Grid Auto-Scroll & Search (Ultra Optimized - Instant)
// @match https://www.youtube.com/*
// @grant GM_addStyle
// @grant GM_getValue
// @grant GM_setValue
// @version 2.3
// @description Automatically scrolls to a specified text within a YouTube grid. Search box in masthead, search on button click only, stop button, animated border highlighting, and no results message. Improved robustness, accessibility, and user experience.
// @author Your Name (with further optimization)
// @license MIT
// @namespace https://gf.zukizuki.org/users/1435316
// ==/UserScript==
(function() {
'use strict';
let targetText = "";
let searchBox;
let isSearching = false;
let searchInput;
let searchButton;
let stopButton;
let observer;
let searchTimeout;
const SEARCH_TIMEOUT_MS = 20000; // 20 seconds
const SCROLL_DELAY_MS = 750;
const MAX_SEARCH_LENGTH = 255; // Prevent excessively long search strings
GM_addStyle(`
/* Existing CSS (with additions) */
#floating-search-box {
background-color: #222;
padding: 5px;
border: 1px solid #444;
border-radius: 5px;
display: flex;
align-items: center;
margin-left: 10px;
}
/* Responsive width for smaller screens */
@media (max-width: 768px) {
#floating-search-box input[type="text"] {
width: 150px; /* Smaller width on smaller screens */
}
}
#floating-search-box input[type="text"] {
background-color: #333;
color: #fff;
border: 1px solid #555;
padding: 3px 5px;
border-radius: 3px;
margin-right: 5px;
width: 200px;
height: 30px;
}
#floating-search-box input[type="text"]:focus {
outline: none;
border-color: #065fd4;
}
#floating-search-box button {
background-color: #065fd4;
color: white;
border: none;
padding: 3px 8px;
border-radius: 3px;
cursor: pointer;
height: 30px;
}
#floating-search-box button:hover {
background-color: #0549a8;
}
#floating-search-box button:focus {
outline: none;
}
#stop-search-button {
background-color: #aa0000; /* Red color */
}
#stop-search-button:hover {
background-color: #800000;
}
.highlighted-text {
position: relative; /* Needed for the border to be positioned correctly */
z-index: 1; /* Ensure the border is on top of other elements */
}
/* Creates the animated border effect */
.highlighted-text::before {
content: '';
position: absolute;
top: -2px;
left: -2px;
right: -2px;
bottom: -2px;
border: 2px solid transparent;
border-radius: 8px;
background: linear-gradient(to right, red, orange, yellow, green, blue, indigo, violet);
background-size: 400% 400%;
animation: gradientAnimation 5s ease infinite;
z-index: -1;
}
/* Keyframes for the gradient animation */
@keyframes gradientAnimation {
0% {
background-position: 0% 50%;
}
50% {
background-position: 100% 50%;
}
100% {
background-position: 0% 50%;
}
}
/* Style for the error message */
#search-error-message {
color: red;
font-weight: bold;
padding: 5px;
position: fixed; /* Fixed position */
top: 50px; /* Position below the masthead (adjust as needed)*/
left: 50%;
transform: translateX(-50%); /* Center horizontally */
background-color: rgba(0, 0, 0, 0.8); /* Semi-transparent black */
color: white;
border-radius: 5px;
z-index: 10000; /* Ensure it's on top */
display: none; /* Initially hidden */
}
/* Style for the no results message */
#search-no-results-message {
color: #aaa; /* Light gray */
padding: 5px;
position: fixed;
top: 50px; /* Same position as error message */
left: 50%;
transform: translateX(-50%);
background-color: rgba(0, 0, 0, 0.8);
border-radius: 5px;
z-index: 10000;
display: none; /* Initially hidden */
}
`);
// --- Create the Search Box ---
function createSearchBox() {
searchBox = document.createElement('div');
searchBox.id = 'floating-search-box';
searchBox.setAttribute('role', 'search'); // Add ARIA role for accessibility
searchInput = document.createElement('input');
searchInput.type = 'text';
searchInput.placeholder = 'Search to scroll...';
searchInput.value = GM_getValue('lastSearchTerm', '');
searchInput.setAttribute('aria-label', 'Search within YouTube grid'); // ARIA label
searchInput.maxLength = MAX_SEARCH_LENGTH; // Limit input length
searchButton = document.createElement('button');
searchButton.textContent = 'Search';
searchButton.addEventListener('click', searchAndScroll);
searchButton.setAttribute('aria-label', 'Start search'); // ARIA label
stopButton = document.createElement('button');
stopButton.textContent = 'Stop';
stopButton.id = 'stop-search-button';
stopButton.addEventListener('click', stopSearch);
stopButton.setAttribute('aria-label', 'Stop search'); // ARIA label
searchBox.appendChild(searchInput);
searchBox.appendChild(searchButton);
searchBox.appendChild(stopButton);
const mastheadEnd = document.querySelector('#end.ytd-masthead');
const buttonsContainer = document.querySelector('#end #buttons');
if (mastheadEnd) {
if(buttonsContainer){
mastheadEnd.insertBefore(searchBox, buttonsContainer);
} else{
mastheadEnd.appendChild(searchBox);
}
} else {
console.error("Could not find the YouTube masthead's end element.");
showErrorMessage("Could not find the YouTube masthead. Search box placed at top of page.");
document.body.insertBefore(searchBox, document.body.firstChild);
}
// Trigger search on load if text is present and the URL indicates a channel page
if (searchInput.value.trim() !== "" && window.location.href.includes("/videos")) {
searchAndScroll();
}
}
// --- Show Error Message ---
function showErrorMessage(message) {
let errorDiv = document.getElementById('search-error-message');
if (!errorDiv) {
errorDiv = document.createElement('div');
errorDiv.id = 'search-error-message';
document.body.appendChild(errorDiv);
}
errorDiv.textContent = message;
errorDiv.style.display = 'block';
setTimeout(() => {
errorDiv.style.display = 'none';
}, 5000); // Hide after 5 seconds
}
// --- Show "No Results" Message ---
function showNoResultsMessage() {
let noResultsDiv = document.getElementById('search-no-results-message');
if (!noResultsDiv) {
noResultsDiv = document.createElement('div');
noResultsDiv.id = 'search-no-results-message';
noResultsDiv.textContent = "No matching results found."; // Set the text
document.body.appendChild(noResultsDiv);
}
noResultsDiv.style.display = 'block';
// Hide the message after a few seconds
setTimeout(() => {
noResultsDiv.style.display = 'none';
}, 5000);
}
// --- Stop Search Function ---
function stopSearch() {
if (observer) {
observer.disconnect();
}
isSearching = false;
clearTimeout(searchTimeout);
const prevHighlighted = document.querySelector('.highlighted-text');
if (prevHighlighted) {
prevHighlighted.classList.remove('highlighted-text');
}
}
// --- Optimized Search and Scroll Function ---
function searchAndScroll() {
if (isSearching) return;
isSearching = true;
clearTimeout(searchTimeout);
if (observer) {
observer.disconnect();
}
targetText = searchInput.value.trim().toLowerCase();
if (!targetText) {
isSearching = false;
return;
}
GM_setValue('lastSearchTerm', targetText);
// Remove previous highlights
const prevHighlighted = document.querySelector('.highlighted-text');
if (prevHighlighted) {
prevHighlighted.classList.remove('highlighted-text');
prevHighlighted.style.position = ''; //remove inline styles, if any
}
let foundMatch = false; // Keep track of whether a match was found
observer = new IntersectionObserver((entries) => {
for (const entry of entries) {
if (entry.isIntersecting) {
const titleElement = entry.target.querySelector('#video-title'); // More reliable selector
if (titleElement && titleElement.textContent.toLowerCase().includes(targetText)) {
foundMatch = true;
entry.target.scrollIntoView({ behavior: 'auto', block: 'center' });
entry.target.classList.add('highlighted-text');
observer.disconnect();
isSearching = false;
clearTimeout(searchTimeout);
return;
}
}
}
});
//Observe all grid items.
document.querySelectorAll('ytd-rich-grid-media').forEach(item => {
observer.observe(item);
});
searchTimeout = setTimeout(() => {
stopSearch();
if (!foundMatch) {
showNoResultsMessage(); //show no results message.
}
}, SEARCH_TIMEOUT_MS);
setTimeout(() => {
if (!document.querySelector('.highlighted-text')) {
window.scrollTo({ top: document.documentElement.scrollHeight, behavior: 'auto' });
setTimeout(() => {
if (!isSearching) return; // Check again in case stop was pressed
isSearching = false;
searchAndScroll(); // Recursive call
}, SCROLL_DELAY_MS);
} else {
isSearching = false;
}
}, 100);
}
// --- Initialization ---
createSearchBox();
})();