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Att Video Preload
Att Video Preload
π 2026-06-14 | π HTML
## HTML
preload Attribute The `preload` attribute of the HTML `
` tag specifies if and how the author thinks the video file should be loaded when the page loads. Using the `preload` attribute correctly allows developers to balance page load performance, bandwidth consumption, and user experience. --- ## Definition and Usage The `preload` attribute provides a hint to the browser about what the author thinks will lead to the best user experience. ### Key Rules: * **Ignored with Autoplay:** If the `autoplay` attribute is present, the `preload` attribute is completely ignored by the browser, as the video must start downloading immediately to play. * **Browser Discretion:** The `preload` attribute is a hint, not a strict command. Browsers may ignore its value based on user settings, network conditions, or device resource constraints (e.g., data-saver modes on mobile devices). --- ## Syntax ```html
``` --- ## Attribute Values | Value | Description | | :--- | :--- | | `auto` | Suggests that the browser should load the entire video file when the page loads. Use this if the user is highly likely to play the video. | | `metadata` | Suggests that the browser should only load the video's metadata (such as dimensions, duration, first frame, and tracks) when the page loads. This is the recommended default for a balanced user experience. | | `none` | Suggests that the browser should not load any video data when the page loads. The video will only start downloading when the user clicks the play button. Ideal for minimizing bandwidth usage. | --- ## Code Examples ### Example 1: Do Not Preload the Video (`preload="none"`) This configuration is ideal for pages with multiple videos or where saving user bandwidth is a priority. The video will not load until the user interacts with it. ```html
Your browser does not support the video tag.
``` ### Example 2: Preload Metadata Only (`preload="metadata"`) This configuration loads only basic information like the video duration and the first frame placeholder, without downloading the actual video stream until play is requested. ```html
Your browser does not support the video tag.
``` --- ## Browser Support The `preload` attribute is supported by all modern web browsers: * Google Chrome * Mozilla Firefox * Microsoft Edge * Safari * Opera *Note: Legacy versions of Internet Explorer (IE 8 and earlier) do not support the `
` tag or its attributes.* --- ## Important Considerations 1. **Mobile Devices and Data Saving:** Many mobile browsers ignore `preload="auto"` to prevent excessive data usage on cellular networks. They often default to `none` or `metadata` regardless of the attribute value. 2. **Performance Optimization:** * Use `preload="none"` on pages containing multiple video elements (e.g., video galleries) to prevent severe page load delays. * Use `preload="auto"` sparinglyβonly when the video is the primary focus of the page (e.g., a dedicated video player page).
β Att Video Src
Att Video Poster β
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