YouTip
Home
JavaScript
PHP
Python3
HTML
C#
Python
Java
PyTorch
Linux
C
jQuery
CSS
XML
jQuery UI
Bootstrap
C++
Angular
HTML DOM
Redis
Web Building
Home
>
HTML
>
Att Video Poster
Att Video Poster
π 2026-06-14 | π HTML
## HTML <video> `poster` Attribute The `poster` attribute of the HTML `
` element specifies an image to be shown while the video is downloading, or until the user clicks the play button. If this attribute is not specified, nothing is displayed until the first frame of the video is available, which can result in a blank or black box on your webpage. --- ## Browser Support The `poster` attribute is fully supported by all modern web browsers: * Google Chrome * Mozilla Firefox * Safari * Microsoft Edge * Opera *Note: Internet Explorer 8 and earlier versions do not support the `
` tag or its attributes.* --- ## Syntax ```html
``` ### Attribute Values | Value | Description | | :--- | :--- | | `URL` | The URL of the image to be displayed as the placeholder.
**Possible values:**
β’ **Absolute URL:** Points to an external website (e.g., `poster="https://www.example.com/image.jpg"`)
β’ **Relative URL:** Points to a file within the same website (e.g., `poster="/images/cover.jpg"`) | --- ## Code Examples ### Basic Implementation The following example demonstrates a video player that displays a preview image (`/images/w3html5.gif`) before the video starts playing: ```html
Your browser does not support the HTML video tag.
``` --- ## Best Practices and Considerations ### 1. Image Aspect Ratio Ensure that the poster image has the same aspect ratio as the video. If the aspect ratio of the poster image does not match the video dimensions, the browser may stretch, crop, or add black bars (letterboxing) to the image to make it fit. ### 2. Performance Optimization * **File Size:** Optimize the poster image file size (using modern formats like WebP or optimized JPEG) to ensure it loads instantly. A heavy poster image defeats the purpose of providing a quick visual preview. * **Preloading:** The poster image is loaded immediately when the page loads, even if the video itself is set to `preload="none"`. ### 3. Fallback Behavior If the `poster` attribute is omitted: * Some browsers will display a black frame until the video starts. * Other browsers will attempt to load and display the very first frame of the video as soon as enough data is buffered. Specifying a `poster` ensures a consistent user experience across all browsers.
β Att Video Preload
Att Video Muted β
π Categories
β‘ JavaScript
(1589)
π PHP
(872)
π Python3
(810)
π HTML
(691)
βοΈ C#
(650)
π Python
(594)
β Java
(552)
βοΈ PyTorch
(534)
π§ Linux
(472)
βοΈ C
(432)
π¦ jQuery
(406)
π¨ CSS
(377)
π XML
(259)
π¦ jQuery UI
(231)
π― Bootstrap
(220)
βοΈ C++
(215)
π °οΈ Angular
(205)
π HTML DOM
(201)
π΄ Redis
(188)
π Web Building
(142)
π Vue.js
(141)
π R
(131)
πΌ Pandas
(124)
ποΈ SQL
(105)
βοΈ Docker
(86)
βοΈ TypeScript
(73)
βοΈ Highcharts
(70)
π AI Agent
(70)
βοΈ React
(68)
π Node.js
(65)
βοΈ Machine Learning
(60)
π Git
(59)
π΅ Go
(58)
π Markdown
(58)
π’ NumPy
(55)
π§ͺ Flask
(54)
βοΈ Scala
(53)
ποΈ SQLite
(52)
π JSTL
(52)
βοΈ VS Code
(51)
π MongoDB
(49)
π Perl
(48)
π Ruby
(47)
π Matplotlib
(47)
βοΈ Uncategorized
(46)
π Swift
(46)
ποΈ PostgreSQL
(46)
βοΈ Data Structures
(46)
π Playwright
(46)
π iOS
(45)
ποΈ MySQL
(44)
βοΈ LangChain
(43)
π FastAPI
(40)
βοΈ Ionic
(38)
π Design Patterns
(37)
βοΈ Eclipse
(37)
π¨ CSS3
(34)
π Lua
(34)
βοΈ Codex
(34)
πΈ Django
(32)
βοΈ OpenCV
(32)
π Rust
(31)
π JSP
(31)
βοΈ Claude Code
(31)
π Pillow
(30)
βοΈ OpenCode
(28)
π AI Skills
(27)
π Flutter
(26)
π Maven
(26)
π¨ Tailwind CSS
(25)
π§ TensorFlow
(25)
π Servlet
(24)
π Dart
(23)
π Assembly
(23)
βοΈ Memcached
(22)
βοΈ SVG
(22)
βοΈ Electron
(22)
π NLP
(22)
π Regex
(21)
π Android
(20)
π£ Kotlin
(19)
π Julia
(19)
π SOAP
(17)
π Selenium
(17)
π PowerShell
(17)
π Sass
(16)
π HTTP
(16)
π Zig
(15)
π AI
(15)
π AJAX
(14)
π Swagger
(14)
βοΈ Scikit-learn
(13)
βοΈ ECharts
(13)
βοΈ Chart.js
(13)
βοΈ Cursor
(13)
βοΈ SciPy
(12)
π RDF
(12)
π Ollama
(12)
π Next.js
(12)
π Plotly Dash
(12)
π JSON
(11)
π RESTful API
(11)
π WSDL
(9)
βοΈ CMake
(8)
π Firebug
(7)
π Nginx
(6)
βΈοΈ Kubernetes
(6)
π Jupyter
(6)
π LaTeX
(4)
π UniApp
(4)
ποΈ SQL Server
(1)