Document: hasPrivateToken() method
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The hasPrivateToken() method of the Document interface returns a promise that fulfills with a boolean indicating whether the browser has a private state token stored from a particular issuer server.
Syntax
js
hasPrivateToken(issuer)
Parameters
issuer-
A string representing the URL of an issuer server.
Return value
A Promise that resolves with a boolean value indicating whether the browser has a private state token stored from the specified issuer server.
Exceptions
InvalidStateErrorDOMException-
Thrown if the current
Documentis not yet active. NotAllowedErrorDOMException-
Thrown if:
- The current
Documentis not loaded in a secure context. - The maximum number of issuers per top level origin (two) has been exceeded.
- The current
TypeErrorDOMException-
Thrown if
issueris not a valid URL.
Examples
js
const hasToken = await Document.hasPrivateToken(`issuer.example`);
if (!hasToken) {
await fetch(
"https://issuer.example/.well-known/private-state-token/issuance",
{
method: "POST",
privateToken: {
version: 1,
operation: "token-request",
},
},
);
}
Specifications
| Specification |
|---|
| Private State Token API # dom-document-hasprivatetoken |
Browser compatibility
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hasPrivateToken
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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.