JAVASCRIPT

how to check wether the property exist in a object in java script

if (obj.hasOwnProperty('prop')) {
    // do something
}

js check if object has property

const object1 = new Object();
object1.property1 = 42;

console.log(object1.hasOwnProperty('property1'));
// expected output: true

object has property

hero.hasOwnProperty('name');     // => true