JavaScript Symbol hasInstance Property

by Online Tutorials Library July 22, 2022

JavaScript Symbol.hasInstance Property

The JavaScript Symbol.hasInstance is used to determine if a constructor object recognizes an object as its instance.

Syntax

Parameters

An object as one of the constructor.

Return value

Return true if the value is in the chain of an object, otherwise false.

Browser Support

Chrome	5.1
Safari	Yes
Firefox	50
Opera	Yes

Example 1

  <script>  //JavaScript to illustrate Symbol.hasInstance  var TutorAspire = [12,45];  document.write( Array[ Symbol.hasInstance ](TutorAspire) );  //expected output:true  </script>  

Test it Now

Output:

true

Example 2

  <script>  //JavaScript to illustrate Symbol.hasInstance  //Using user define function  function TutorAspire ()  {}  var Script = new TutorAspire document.write( TutorAspire [ Symbol.hasInstance ](Script) );  //expected output:true  </script>  

Test it Now

Output:

true.

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