how to check if property exists in object js code example
Example 1: how to check wether the property exist in a object in java script
if (obj.hasOwnProperty('prop')) {
}
Example 2: 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 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');