TrustedTypePolicyFactory.getPropertyType()

The getPropertyType() method of the TrustedTypePolicyFactory interface allows web developers to check if a Trusted Type is required for an element's property.

tagName

A string containing the name of an HTML tag.

property

A string containing a property, for example "innerHTML".

elementNsOptional

A string containing a namespace, if empty defaults to the HTML namespace.

A string with one of:

• "TrustedHTML"
• "TrustedScript"
• "TrustedScriptURL"

Or, null.

In this example, passing the <div> element and innerHTML property to getPropertyType returns "TrustedHTML".

console.log(trustedTypes.getPropertyType('div', 'innerHTML')); // "TrustedHTML"