JavaScript native function (built-in function)

1.JavaScript native function (built-in function)

JavaScript native functions (built-in functions) are:

            String () number            ()            Boolean ()            Array ()            Object ()            Function ()            RegExp ()            Date ()            Error ()            Symbol ()

2. create built-in functions

 <! DOCTYPE html> Console.log ( new   Date ());  //  do not use the New keyword automatically, the effect is the same as   Console.log (Date ()) Console.log ( new  Array (3));  //  do not use the New keyword automatically, the effect is the same as the  console. Log (Array (3 </script> </body> 

Note that symbol does not use new for creation.

JavaScript native function (built-in function)