The toJSON() method of the TrustedHTML interface returns a JSON representation of the stored data.

None.

A string containing a JSON representation of the stored data.

The constant escaped is an object created via the Trusted Types policy escapeHTMLPolicy. The toString() method returns a string to safely insert into a document.

const escapeHTMLPolicy = trustedTypes.createPolicy("myEscapePolicy", {
  createHTML: (string) => string.replace(/>/g, "<"),
});

const escaped = escapeHTMLPolicy.createHTML("<img src=x onerror=alert(1)>");
console.log(escaped.toJSON());