TYPESCRIPT

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)

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)