TrustedTypePolicyFactory: isScriptURL() method
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The isScriptURL() method of the TrustedTypePolicyFactory interface returns true if it is passed a valid TrustedScriptURL object.
Note: The purpose of the functions isScriptURL(), isHTML(), and isScript() is to check if the object is a valid TrustedType object, created by a configured policy.
Syntax
isScriptURL(value)
Parameters
value-
A
TrustedScriptURLobject.
Return value
A booleanthat is true if the object is a valid TrustedScriptURL object.
Examples
In the below example the constant url was created by a policy, and therefore isScriptURL() returns true. The second example is an attempt to fake an object, and the third is a string. Both of these will return false when passed to isScriptURL().
const url = policy.createScriptURL("https://example.com/myscript.js");
console.log(trustedTypes.isScriptURL(url)); // true;
const fake = Object.create(TrustedScriptURL.prototype);
console.log(trustedTypes.isScriptURL(fake)); // false
console.log(trustedTypes.isScriptURL("https://example.com/myscript.js")); // false
Specifications
| Specification |
|---|
| Trusted Types # dom-trustedtypepolicyfactory-isscripturl |
Browser compatibility
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