how to check if object has key javascript
myObj.hasOwnProperty('key') // it checks object for particular key and not on prototypehow to check if object has key javascript
myObj.hasOwnProperty('key') // it checks object for particular key and not on prototypecheck the properties of an object in javascript
for (var name in object) {
if (object.hasOwnProperty(name)) {
// do something with name
}
}
// OR
const hero = {
name: 'Batman'
};
hero.hasOwnProperty('name'); // => true
hero.hasOwnProperty('realName'); // => falsejs object contain key
if ('key' in myObj)
// better
if (!myObj.hasOwnProperty('key'))test if property exists javascript
const hero = {
name: 'Batman'
};
hero.hasOwnProperty('name'); // => true
hero.hasOwnProperty('realName'); // => falsejavascript does object have property
var person = {'first_name': 'bill','age':20};
if ( person.hasOwnProperty('first_name') ) {
//person has a first_name property
}typescript check if object has key
if ('key' in myObj)Copyright © 2021 Codeinu
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