Dynamically adjusts the YouTube video grid to display an optimal number of videos per row based on window width, overriding the default 3-video grid for a more responsive layout
目前為
// ==UserScript==
// @name YouTube Dynamic Video Grid
// @name:zh-CN YouTube 动态视频网格
// @description Dynamically adjusts the YouTube video grid to display an optimal number of videos per row based on window width, overriding the default 3-video grid for a more responsive layout
// @description:zh-CN 根据窗口宽度动态调整 YouTube 视频网格，以每行显示最佳数量的视频，覆盖默认的 3 个视频网格，以实现响应更快的布局
// @author Nick Fedor
// @namespace https://github.com/nicholas-fedor/youtube-dynamic-grid
// @supportURL https://github.com/nicholas-fedor/youtube-dynamic-grid/issues
// @homepageURL https://github.com/nicholas-fedor/youtube-dynamic-grid
// @homepage https://github.com/nicholas-fedor/youtube-dynamic-grid
// @license MIT
// @match https://www.youtube.com/*
// @match https://youtube.com/*
// @icon https://www.youtube.com/s/desktop/ee47b5e0/img/logos/favicon_144x144.png
// @compatible chrome
// @compatible firefox
// @compatible edge
// @compatible opera
// @compatible safari
// @compatible kiwi
// @compatible qq
// @compatible via
// @compatible brave
// @version 2025.6.3.1
// @run-at document-end
// ==/UserScript==
/**
* YouTube Dynamic Video Grid Tampermonkey script.
* Adjusts the YouTube video grid to display 3-12 videos per row based on window width.
* Skips execution on playlist pages to prevent layout overlap.
* Version history:
* - 1.0.2 (2025-05-30): Fixed playlist overlap, improved navigation handling, refactored for maintainability.
* - 1.0.1 (2025-05-13): Added SPA navigation, CSP compliance, optimized polling.
* - 1.0.0 (2024-04-25): Initial release.
*/
(function () {
'use strict'
// Configuration constants
const CONFIG = {
VIDEO_WIDTH: 340, // Thumbnail width in pixels
MARGIN: 40, // Total left/right margins in pixels
GAP: 10, // Spacing between thumbnails in pixels
MIN_ITEMS: 3, // Minimum items per row
MAX_ITEMS: 12, // Maximum items per row
NAVIGATION_POLL_INTERVAL: 500, // Navigation polling interval in ms
GRID_POLL_INTERVALS: { early: 200, regular: 1000 }, // Polling intervals in ms
POLLING_DURATIONS: { early: 5000, regular: 25000 }, // Polling durations in ms
DEBOUNCE_DELAY: 100, // Debounce delay for navigation and resize in ms
UPDATE_DELAY: 50, // Debounce delay for grid updates in ms
RETRY_ATTEMPTS: 20, // Grid update retry attempts
RETRY_INTERVAL: 100, // Retry interval in ms
STABLE_COUNT: 5 // Number of stable checks to stop polling
}
// Utility Functions
/**
* Checks if the current page is a YouTube playlist page.
* @returns {boolean} True if URL starts with /playlist
*/
const isPlaylistPage = () => window.location.pathname.startsWith('/playlist')
/**
* Logs messages to the console based on debug mode and log level.
* @param {string} message - Message to log
* @param {'info' | 'debug' | 'error'} [level='info'] - Log level
*/
const logger = (message, level = 'info') => {
const isDebug = window.location.search.includes('debug=1')
if (
level === 'error' ||
(isDebug && (level === 'info' || level === 'debug'))
) {
console[level === 'error' ? 'error' : 'log'](
`[YouTube Dynamic Grid][${level}] ${message}`
)
}
}
// Grid Management Functions
const GridManager = {
/**
* Calculates the number of items per row based on container width.
* @returns {number} Number of items per row (3-12)
*/
calculateItemsPerRow() {
const container = document.querySelector(
'#contents, ytd-two-column-browse-results-renderer, body'
)
if (!container) {
logger('No container found for grid calculation', 'error')
return CONFIG.MIN_ITEMS
}
const width =
container.getBoundingClientRect().width || window.innerWidth
const items = Math.round(
(width - CONFIG.MARGIN) / (CONFIG.VIDEO_WIDTH + CONFIG.GAP)
)
return Math.max(CONFIG.MIN_ITEMS, Math.min(CONFIG.MAX_ITEMS, items))
},
/**
* Updates the grid's elements-per-row attribute and CSS styles.
*/
updateGrid() {
if (this.updateTimeout) clearTimeout(this.updateTimeout)
this.updateTimeout = setTimeout(() => {
try {
const grid = document.querySelector(
'ytd-rich-grid-renderer:not([hidden])'
)
if (!grid) {
logger('No visible grid found')
return
}
const itemsPerRow = this.calculateItemsPerRow()
const currentItems = getComputedStyle(grid)
.getPropertyValue('--ytd-rich-grid-items-per-row')
.trim()
const currentAttr =
grid.getAttribute('elements-per-row') || 'unknown'
if (
currentItems !== String(itemsPerRow) ||
currentAttr !== String(itemsPerRow)
) {
grid.setAttribute('elements-per-row', itemsPerRow)
this.updateCSS(itemsPerRow)
logger(`Updated grid to ${itemsPerRow} items`)
}
} catch (error) {
logger(`Failed to update grid: ${error.message}`, 'error')
}
}, CONFIG.UPDATE_DELAY)
},
/**
* Injects or updates the CSS style element for the grid.
*/
injectCSS() {
if (isPlaylistPage()) {
logger('Skipping CSS injection on playlist page')
this.removeCSS()
return
}
let style = document.getElementById('dynamic-grid-style')
if (!style) {
style = document.createElement('style')
style.id = 'dynamic-grid-style'
const nonce = document.querySelector('meta[name="csp-nonce"]')?.content
if (nonce) style.nonce = nonce
document.head.appendChild(style)
logger('Injected CSS style element', 'debug')
}
this.updateCSS(this.calculateItemsPerRow())
},
/**
* Updates the CSS rule for the specified number of items per row.
* @param {number} itemsPerRow - Number of items per row
*/
updateCSS(itemsPerRow) {
const style = document.getElementById('dynamic-grid-style')
if (!style) return
style.textContent = `
#contents, ytd-two-column-browse-results-renderer {
max-width: 100% !important;
width: 100% !important;
padding: 0 !important;
}
ytd-rich-grid-renderer:not([hidden]) {
--ytd-rich-grid-items-per-row: ${itemsPerRow} !important;
--ytd-rich-grid-posts-per-row: ${itemsPerRow} !important;
max-width: 100% !important;
padding: 0 !important;
gap: ${CONFIG.GAP}px !important;
}
ytd-rich-grid-renderer:not([hidden]) [is-in-first-column] {
margin-left: 8px !important;
margin-right: 8px !important;
margin-bottom: 16px !important;
}
ytd-rich-grid-renderer:not([hidden]) ytd-rich-item-renderer {
margin: 0 8px 16px 8px !important;
}
`
},
/**
* Removes the CSS style element and resets grid attributes.
*/
removeCSS() {
const style = document.getElementById('dynamic-grid-style')
if (style) {
style.remove()
logger('Removed CSS style element', 'debug')
}
const grid = document.querySelector('ytd-rich-grid-renderer')
if (grid) {
grid.removeAttribute('elements-per-row')
grid.style.removeProperty('--ytd-rich-grid-items-per-row')
grid.style.removeProperty('--ytd-rich-grid-posts-per-row')
logger('Reset grid attributes', 'debug')
}
},
/**
* Attempts to update the grid with retries.
* @param {number} [attempts=CONFIG.RETRY_ATTEMPTS] - Retry attempts
*/
tryUpdate(attempts = CONFIG.RETRY_ATTEMPTS) {
if (isPlaylistPage()) {
logger('Skipping grid update on playlist page')
this.removeCSS()
return
}
this.updateGrid()
if (
attempts > 0 &&
!document.querySelector('ytd-rich-grid-renderer:not([hidden])')
) {
logger(`Retrying grid update (${attempts} attempts left)`, 'debug')
setTimeout(() => this.tryUpdate(attempts - 1), CONFIG.RETRY_INTERVAL)
}
},
/**
* Polls the grid for changes until stable.
* @param {'early' | 'regular'} mode - Polling mode
*/
pollGrid(mode = 'early') {
if (isPlaylistPage()) {
logger(`Skipping ${mode} polling on playlist page`)
this.removeCSS()
return
}
if (this.pollInterval) clearInterval(this.pollInterval)
let stableCount = 0
const interval = CONFIG.GRID_POLL_INTERVALS[mode]
const duration = CONFIG.POLLING_DURATIONS[mode]
this.pollInterval = setInterval(() => {
const grid = document.querySelector(
'ytd-rich-grid-renderer:not([hidden])'
)
if (grid) {
const currentItems = getComputedStyle(grid)
.getPropertyValue('--ytd-rich-grid-items-per-row')
.trim()
const currentAttr =
grid.getAttribute('elements-per-row') || 'unknown'
const itemsPerRow = this.calculateItemsPerRow()
if (
currentItems !== String(itemsPerRow) ||
currentAttr !== String(itemsPerRow)
) {
this.updateGrid()
stableCount = 0
} else {
stableCount++
if (stableCount >= CONFIG.STABLE_COUNT) {
clearInterval(this.pollInterval)
logger(`Stopped ${mode} polling: grid stable`)
if (mode === 'early') this.pollGrid('regular')
else this.updateGrid()
}
}
}
}, interval)
setTimeout(() => {
clearInterval(this.pollInterval)
logger(`Stopped ${mode} polling`)
if (mode === 'early') this.pollGrid('regular')
else this.updateGrid()
}, duration)
},
// Internal state
updateTimeout: null,
pollInterval: null
}
// Navigation Management Functions
const NavigationManager = {
/**
* Handles navigation events by reinitializing the grid.
*/
handleNavigation() {
if (this.navigationDebounce) clearTimeout(this.navigationDebounce)
this.navigationDebounce = setTimeout(() => {
this.navigationTimeouts.forEach(clearTimeout)
this.navigationTimeouts = []
cleanup()
if (isPlaylistPage()) {
logger('Skipping grid initialization on playlist page')
GridManager.removeCSS()
return
}
logger('Initializing grid for non-playlist page')
GridManager.injectCSS()
GridManager.tryUpdate()
this.startObserver()
GridManager.pollGrid()
this.navigationTimeouts.push(
setTimeout(() => GridManager.updateGrid(), 1000)
)
this.navigationTimeouts.push(
setTimeout(() => GridManager.updateGrid(), 5000)
)
this.navigationTimeouts.push(
setTimeout(() => GridManager.updateGrid(), 10000)
)
if (this.eventListeners) cleanup()
this.eventListeners = this.setupEventListeners()
}, CONFIG.DEBOUNCE_DELAY)
},
/**
* Monitors SPA navigation via URL polling.
*/
monitorNavigation() {
setInterval(() => {
const currentUrl = location.href
if (currentUrl !== this.lastUrl) {
this.lastUrl = currentUrl
logger(`Navigated to ${currentUrl}`, 'debug')
this.handleNavigation()
}
}, CONFIG.NAVIGATION_POLL_INTERVAL)
logger('Started navigation polling', 'debug')
},
/**
* Starts the MutationObserver for grid changes.
*/
startObserver() {
if (isPlaylistPage()) {
logger('Skipping observer start on playlist page')
GridManager.removeCSS()
return
}
if (this.observer) {
this.observer.disconnect()
logger('Disconnected previous observer', 'debug')
}
this.observer = new MutationObserver(mutations => {
for (const mutation of mutations) {
if (
mutation.target.matches('ytd-rich-grid-renderer') ||
mutation.target.closest('ytd-rich-grid-renderer') ||
mutation.target.querySelector('ytd-rich-grid-renderer') ||
['style', 'hidden', 'class', 'elements-per-row'].includes(
mutation.attributeName
) ||
mutation.addedNodes.length > 0
) {
GridManager.updateGrid()
break
}
}
})
const target = document.querySelector(
'#contents, ytd-two-column-browse-results-renderer, ytd-app'
)
if (target) {
this.observer.observe(target, {
childList: true,
subtree: true,
attributes: true,
attributeFilter: ['style', 'class', 'hidden', 'elements-per-row']
})
logger('Started observer', 'debug')
} else {
logger('Observer target not found, retrying', 'debug')
setTimeout(() => this.startObserver(), CONFIG.RETRY_INTERVAL)
}
},
/**
* Sets up event listeners for resize, load, and popstate.
* @returns {Object} Listener references
*/
setupEventListeners() {
if (isPlaylistPage()) {
logger('Skipping event listener setup on playlist page')
return null
}
const resizeHandler = () => {
clearTimeout(this.resizeTimeout)
this.resizeTimeout = setTimeout(() => {
logger('Window resized', 'debug')
if (!isPlaylistPage()) GridManager.updateGrid()
}, CONFIG.DEBOUNCE_DELAY)
}
const loadHandler = () => {
logger('Page loaded', 'debug')
this.handleNavigation()
}
const popstateHandler = () => {
logger('Popstate navigation detected', 'debug')
this.handleNavigation()
}
window.addEventListener('resize', resizeHandler)
window.addEventListener('load', loadHandler)
window.addEventListener('popstate', popstateHandler)
logger('Set up event listeners', 'debug')
return { resizeHandler, loadHandler, popstateHandler }
},
// Internal state
lastUrl: location.href,
observer: null,
navigationTimeouts: [],
navigationDebounce: null,
resizeTimeout: null,
eventListeners: null
}
/**
* Cleans up all resources (observers, intervals, listeners).
*/
function cleanup() {
if (NavigationManager.observer) {
NavigationManager.observer.disconnect()
NavigationManager.observer = null
}
if (GridManager.pollInterval) {
clearInterval(GridManager.pollInterval)
GridManager.pollInterval = null
}
NavigationManager.navigationTimeouts.forEach(clearTimeout)
clearTimeout(NavigationManager.resizeTimeout)
clearTimeout(GridManager.updateTimeout)
clearTimeout(NavigationManager.navigationDebounce)
if (NavigationManager.eventListeners) {
window.removeEventListener(
'resize',
NavigationManager.eventListeners.resizeHandler
)
window.removeEventListener(
'load',
NavigationManager.eventListeners.loadHandler
)
window.removeEventListener(
'popstate',
NavigationManager.eventListeners.popstateHandler
)
NavigationManager.eventListeners = null
}
logger('Cleaned up resources', 'debug')
}
/**
* Initializes the script.
*/
function init() {
if (isPlaylistPage()) {
logger('Skipping initialization on playlist page', 'info')
GridManager.removeCSS()
NavigationManager.monitorNavigation()
return
}
logger('Initializing script', 'info')
NavigationManager.monitorNavigation()
NavigationManager.handleNavigation()
}
// Start the script with a delay to ensure URL evaluation
setTimeout(init, CONFIG.DEBOUNCE_DELAY)
})()
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