how to check if an object has a specific property in javascript code example
Example 1: how to check wether the property exist in a object in java script
if (obj.hasOwnProperty('prop')) {
}
Example 2: js check if object has property
const object1 = new Object();
object1.property1 = 42;
console.log(object1.hasOwnProperty('property1'));
Example 3: check the properties of an object in javascript
for (var name in object) {
if (object.hasOwnProperty(name)) {
}
}
const hero = {
name: 'Batman'
};
hero.hasOwnProperty('name');
hero.hasOwnProperty('realName');
Example 4: javascript does object have property
var person = {'first_name': 'bill','age':20};
if ( person.hasOwnProperty('first_name') ) {
}