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

InvalidStateError DOMException

Thrown if the current Document is not yet active.

NotAllowedError DOMException

Thrown if:

TypeError DOMException

Thrown if issuer is 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

See also