check if object has element 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: test if property exists javascript
const hero = {
name: 'Batman'
};
hero.hasOwnProperty('name');
hero.hasOwnProperty('realName');
Example 3: check if object has method javascript
if(typeof myObj.prop2 === 'function') {
alert("It's a function");
} else if (typeof myObj.prop2 === 'undefined') {
alert("It's undefined");
} else {
alert("It's neither undefined nor a function. It's a " + typeof myObj.prop2);
}