TrustedTypePolicyFactory: isScript() method
The isScript()
method of the TrustedTypePolicyFactory
interface returns true if it is passed a valid TrustedScript
object.
Note: The purpose of the functions isScript()
, isHTML()
, and isScriptURL()
is to check if the object is a valid TrustedType object, created by a configured policy.
Syntax
Parameters
Return value
A boolean
that is true if the object is a valid TrustedScript
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 myScript = policy.createScript("eval('2 + 2')");
console.log(trustedTypes.isScript(myScript));
const fake = Object.create(TrustedScript.prototype);
console.log(trustedTypes.isScript(fake));
console.log(trustedTypes.isScript("eval('2 + 2')"));
Specifications
Browser compatibility
|
Desktop |
Mobile |
|
Chrome |
Edge |
Firefox |
Internet Explorer |
Opera |
Safari |
WebView Android |
Chrome Android |
Firefox for Android |
Opera Android |
Safari on IOS |
Samsung Internet |
isScript |
83 |
83 |
No |
No |
69 |
No |
83 |
83 |
No |
59 |
No |
13.0 |