Como verificar se o objeto tem o chave JavaScript
myObj.hasOwnProperty('key') // it checks object for particular key and not on prototype
Proud Pony
myObj.hasOwnProperty('key') // it checks object for particular key and not on prototype if ('key' in myObj)
// better
if (!myObj.hasOwnProperty('key'))if ('key' in myObj)if (myObj['key']) {
// Do something
}Object.prototype.hasOwnProperty()console.log("key" in obj)