The RequestDestination enumerated type contains the permitted values for a request's destination. These string values indicate potential types of content that a request may try to retrieve.
""destination. What does it mean?
"audio""audioworklet""document""embed""font""image""manifest""object""paintworklet""report""script""serviceworker""sharedworker""style""track"<track>."video""worker""xslt"| Specification | Status | Comment | 
|---|---|---|
| Fetch The definition of 'RequestDestination' in that specification.  |  Living Standard | Initial definition | 
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | 65 | 14 | 61 | ? | 52 | ? | 
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | ? | 65 | ? | 61 | 52 | ? | ? | 
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    https://developer.mozilla.org/en-US/docs/Web/API/RequestDestination