var a = {}
= 1
= 2
delete a["a"]
(a) // {b:2}
delete
(a) // {}js delete can delete elements in an object according to the key.
var a = {}
= 1
= 2
delete a["a"]
(a) // {b:2}
delete
(a) // {}js delete can delete elements in an object according to the key.