Answers for "object key exist"

javascript does key exist

var person={"name":"Billy","age":20}
person.hasOwnProperty("name"); // true
person.hasOwnProperty("sex"); // false

check if a key exists in an object javascript

"key" in obj // true, regardless of the actual value

how to check if a key exists in an object javascript

"key" in obj // true, regardless of the actual value