Supports-Loading-Mode header
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The HTTP Supports-Loading-Mode response header allows a response to opt-in to being loaded in a novel, higher-risk context that it would otherwise fail to be loaded in.
| Header type | Response header |
|---|---|
| CORS-safelisted response header | No |
Syntax
Supports-Loading-Mode: <client-hint-headers>
Directives
The Supports-Loading-Mode header value is a list of one or more tokens, which can include the following values:
credentialed-prerender-
Indicates that a destination origin opts in to loading documents via cross-origin, same-site prerendering.
fenced-frame-
The response can loaded inside a fenced frame. Without this explicit opt-in, all navigations inside of a fenced frame will fail.
Examples
Supports-Loading-Mode: fenced-frame
Specifications
| Specification |
|---|
| Prerendering Revamped # supports-loading-mode |
Browser compatibility
| desktop | mobile | |||||||||||
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Supports-Loading-Mode
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credentialed-prerender directive
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fenced-frame directive
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.