TrustedHTML: toJSON() method
Baseline
2026
Newly available
Since February 2026, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.
Note: This feature is available in Web Workers.
The toJSON() method of the TrustedHTML interface returns a JSON representation of the stored data.
Syntax
js
toJSON()
Parameters
None.
Return value
A string containing a JSON representation of the stored data.
Examples
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.
js
const escapeHTMLPolicy = trustedTypes.createPolicy("myEscapePolicy", {
createHTML: (string) => string.replace(/</g, "<"),
});
const escaped = escapeHTMLPolicy.createHTML("<img src=x onerror=alert(1)>");
console.log(escaped.toJSON());
Specifications
| Specification |
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| Trusted Types # dom-trustedhtml-tojson |
Browser compatibility
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toJSON
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support