Is there a difference between (function() {…}()); and (function() {…})();? [duplicate]

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There is no practical difference in those two forms, but from a grammatical point of view the difference between the two is that The Grouping Operator – the parentheses – will hold in the first example a CallExpression, that includes the FunctionExpression:

               CallExpression
                |         |
       FunctionExpression |
                |         |
                V         V
    (function() {       }());
    ^                      ^
    |--PrimaryExpression --|

In the second example, we have first a whole CallExpression, that holds the FunctionExpression:

          PrimaryExpression
                |
         FunctionExpression
                |
                V
    (function() {       })();
    ^                      ^
    |--  CallExpression  --|

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