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Contexts
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Context types
| Context | Definition | Type Hint | Scriptable? | Used in HTML? | Used in CSS? | Sniffing Algorithm |
|---|---|---|---|---|---|---|
| browsing | HTML | — | Yes | Yes | No? | MIME type sniffing algorithm |
| image | No | Yes | Yes | rules for sniffing images specifically | ||
| audio/video | No | Yes | No? | rules for sniffing audio and video specifically | ||
| style | @type or "text/css"
|
No | Yes | Yes? | ||
| script | @type or "text/javascript"
|
Yes? | Yes | No? | ||
| font | format()
|
No | No | Yes | rules for sniffing fonts specifically | |
| text track | "text/vtt"
|
No | Yes | No | ||
| cache manifest | "text/cache-manifest"
|
No | Yes | No |
How to use a context
- Identify context.
- Determine whether to fetch resource based on type hint, if any.
- Set no-sniff flag on resource, if necessary.
- Fetch resource.
- Handle resource.
- Sniff resource.
- Process and display resource or prompt to download resource, as appropriate.