The HTTP Feature-Policy
header display-capture
directive controls whether or not the document is permitted to use Screen Capture API, i.e.,getDisplayMedia()
to capture the screen's contents.
If display-capture
is disabled in a document, the document will not be able to initiate screen capture via getDisplayMedia()
.
Syntax
Feature-Policy: display-capture <allowlist>;
- <allowlist>
An allowlist is a list of origins that takes one or more of the following values, separated by spaces:
*
: The feature will be allowed in this document, and all nested browsing contexts (iframes) regardless of their origin.'self'
: The feature will be allowed in this document, and in all nested browsing contexts (iframes) in the same origin.'src'
: (In an iframe allow attribute only) The feature will be allowed in this iframe, as long as the document loaded into it comes from the same origin as the URL in the iframe's src attribute.'none'
: The feature is disabled in top-level and nested browsing contexts.- <origin(s)>: The feature is allowed for specific origins (for example, https://example.com). Origins should be separated by a space.
The values
*
(enable for all origins) or'none'
(disable for all origins) may only be used alone, while'self'
and'src'
may be used with one or more origins.Features are each defined to have a default allowlist, which is one of:
*
: The feature is allowed by default in top-level browsing contexts and all nested browsing contexts (iframes).'self'
: The feature is allowed by default in top-level browsing contexts and in nested browsing contexts (iframes) in the same origin. The feature is not allowed in cross-origin documents in nested browsing contexts.'none'
: The feature is disabled in top-level and nested browsing contexts.
Default policy
The default alowlist is 'self'
.
Specifications
Specification | Status | Comment |
---|---|---|
Feature Policy | Editor's Draft | Initial definition. |
Screen Capture The definition of 'display-capture' in that specification. |
Working Draft | Feature policy directive definition. |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
display-capture | Chrome No support No | Edge No support No | Firefox
Full support
74
| IE No support No | Opera No support No | Safari No support No | WebView Android No support No | Chrome Android No support No | Firefox Android
Full support
67
| Opera Android No support No | Safari iOS No support No | Samsung Internet Android No support No |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- User must explicitly enable this feature.
- User must explicitly enable this feature.