JavaScript hasOwnProperty() Method
hasOwnProperty() method in JavaScript is used to check whether the object has the specified property as its own property. This is useful for checking if the object has inherited the property rather than being its own.
Syntax:
object.hasOwnProperty( prop );
Parameters:
- prop: It holds the name in the form of a String or a Symbol of the property to test.
Return Value:
It returns a Boolean value indicating whether the object has the given property as its own property.
Example 1: This example checks the properties of an object.
Javascript
function checkProperty() {
let exampleObj = {};
exampleObj.height = 100;
exampleObj.width = 100;
result1 = exampleObj.hasOwnProperty( "height" );
result2 = exampleObj.hasOwnProperty( "breadth" );
console.log(result1);
console.log(result2);
}
checkProperty()
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Example 2: This example checks the properties of an object of a class.
Javascript
function checkProperty() {
function Car(a, b) {
this .model = a;
this .name = b;
}
let car1 = new Car( "Mazda" , "Laputa" );
result1 = car1.hasOwnProperty( "model" );
result2 = car1.hasOwnProperty( "wheels" );
console.log(result1);
console.log(result2);
}
checkProperty()
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We have a complete list of Object methods, and properties to check those please go through this JavaScript Object Complete Reference article.
Supported Browsers:
- Google Chrome 1 and above
- Firefox 1 and above
- Internet Explorer 5.5 and above
- Edge 12 and above
- Safari 3 and above
- Opera 5 and above
Last Updated :
07 Dec, 2023
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