JavaScript Symbol hasInstance is used to determine if a given constructor object recognizes the object as its instance.
Syntax:
[Symbol.hasInstance](Object)
Parameters: It accepts a parameter “object”.
Return value: This returns true if the value is in the chain of the object otherwise false.
JavaScript code to show the working of this function.
Below examples illustrate the JavaScript Symbol hasInstance Property:
Example 1:
javascript
// Initialising some objectslet obj1 = [1, 2, 3];let obj2 = ['a', 'b', 'c'];let obj3 = [123];let obj4 = [];// Calling Symbol.hasInstance Property console.log(Array[Symbol.hasInstance](obj1));console.log(Array[Symbol.hasInstance](obj2));console.log(Array[Symbol.hasInstance](obj3));console.log(Array[Symbol.hasInstance](obj4)); |
Output:
true true true true
Example-2:
javascript
// Calling a user define function function gfg() { }// Initialising the objectlet Script = new gfg// Calling the Symbol.hasInstance propertyconsole.log(gfg[Symbol.hasInstance](Script)); |
Output:
true
Supported Browsers:
- Google Chrome 50 above
- Firefox 50 above
- Edge 15 above
- Opera 37 above
- Apple Safari 10 and above
We have a complete list of Javascript symbols’ properties and methods, to check those please go through the Javascript Symbol Complete Reference article.
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