JAVASCRIPT

how to check if object has key javascript

myObj.hasOwnProperty('key') // it checks object for particular key and not on prototype   

js object contain key

if ('key' in myObj)
// better
if (!myObj.hasOwnProperty('key'))

javascript if object has key

if('key' in object)

js object contains key

if (myObj['key']) {
// Do something
}

check object has key

console.log("key" in obj)

check object has key javascript

Object.prototype.hasOwnProperty()

js detect object has key

Object.prototype.hasOwnProperty.call(object, key)