Instance methods

TrustedHTML.toJSON()

Returns a JSON representation of the stored data.

TrustedHTML.toString()

A string containing the sanitized HTML.

Examples

In the below example we create a policy that will create TrustedHTML objects using TrustedTypePolicyFactory.createPolicy(). We can then use TrustedTypePolicy.createHTML() to create a sanitized HTML string to be inserted into the document.

The sanitized value can then be used with Element.innerHTML to ensure that no new HTML elements can be injected.

<div id="myDiv"></div>

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

let el = document.getElementById("myDiv");
const escaped = escapeHTMLPolicy.createHTML("<img src=x onerror=alert(1)>");
console.log(escaped instanceof TrustedHTML); // true
el.innerHTML = escaped;

Specifications

Browser compatibility

See also

• Prevent DOM-based cross-site scripting vulnerabilities with Trusted Types