JavaScript Symbol hasInstance Property

JavaScript Symbol hasInstance Property with examples on javascript symbol methods, javascript symbol property, javascript tutorial, hasInstance, isConcatSpreadable, match, prototype, search, for(), keyFor(), toString(), unscopables, toPrimitive, split etc.

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JavaScript Symbol.hasInstance Property

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

Syntax

[Symbol.hasInstance] (obj)

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 JavaTpoint = [12,45];
document.write( Array[ Symbol.hasInstance ](JavaTpoint) );
//expected output:true
</script>

Test it Now

Output:

true

Example 2

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

Test it Now

Output:

true.

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