The destination
read-only property of the Request
interface returns a string describing the type of content being requested. The string must be one of those found in the RequestDestination
enumerated type or the empty string, which is the default value.
The destination
is used by the user agent to, for example, help determine which set of rules to follow for CORS purposes, or how to navigate any complicated code paths that affect how specific types of request get handled.
These destinations vary substantially in how they operate. Some are simply data receptacles, where the received data is stored for processing later. Others are script-based, in which case the received data is delivered to a script by calling it and passing the data along. Script-based destinations include <script>
elements, as well as any of the Worklet
-based destinations (including AudioWorklet
and PaintWorklet
), and the Worker
-based destinations, including ServiceWorker
and SharedWorker
.
Syntax
var destination = request.destination;
Value
A string from the RequestDestination
enumerated type which indicates the type of content the request is asking for. This type is much broader than the usual document type values (such as "document"
or "manifest"
), and may include contextual cues such as "image"
or "worker"
or "audioworklet"
.
Example
In the following snippet, we create a new request using the Request()
constructor (for an image file in the same directory as the script), then save the request's destination:
var myRequest = new Request('flowers.jpg'); var myDestination = myRequest.destination; // returns the empty string by default
Specifications
Specification | Status | Comment |
---|---|---|
Fetch The definition of 'destination' in that specification. |
Living Standard | Initial definition |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
destination | Chrome Full support 65 | Edge Full support 14 | Firefox Full support 61 | IE No support No | Opera Full support 52 | Safari Full support 10.1 | WebView Android Full support 65 | Chrome Android Full support 65 | Firefox Android Full support 61 | Opera Android Full support 47 | Safari iOS Full support 10.3 | Samsung Internet Android Full support 9.0 |
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.