Different between (function(){})() and (function()

问题:

This question already has answers here:

Are “(function ( ) { } ) ( )” and “(function ( ) { } ( ) )” functionally equal in JavaScript? [duplicate] (3 answers)

Closed 5 years ago.

Look at the placement of the parenthesis, is that any different?

( func )( )

(function(){

})();

and ( func( ) )

(function(){

}());

回答1:

Technically the first defines an anonymous function, then calls it, the second defines an anonymous function which calls itself as it's defined. Realistically, they are identical.