check if a property exists in an object javascript code example
Example 1: How to tell if an attribute exists on an object
const user = {
name: "Sicrano",
age: 14
}
user.hasOwnProperty('name');
user.hasOwnProperty('age');
user.hasOwnProperty('gender');
user.hasOwnProperty('address');
Example 2: how to check wether the property exist in a object in java script
if (obj.hasOwnProperty('prop')) {
}
Example 3: javascript does object have property
var person = {'first_name': 'bill','age':20};
if ( person.hasOwnProperty('first_name') ) {
}
Example 4: test if property exists javascript
const hero = {
name: 'Batman'
};
hero.hasOwnProperty('name');
hero.hasOwnProperty('realName');