js object has any property code example
Example 1: js check if object has property
const object1 = new Object();
object1.property1 = 42;
console.log(object1.hasOwnProperty('property1'));
// expected output: true
Example 2: javascript does object have property
var person = {'first_name': 'bill','age':20};
if ( person.hasOwnProperty('first_name') ) {
//person has a first_name property
}
Example 3: test if property exists javascript
const hero = {
name: 'Batman'
};
hero.hasOwnProperty('name'); // => true
hero.hasOwnProperty('realName'); // => false