About javascript function

Question

I found weird behavior in Javascript:

function() { return 10; }();

This design does not work in all browsers because it has a syntax error. But this construction works (ten returns):

 +function() { return 10; }();

Why?

+4

ilfroloff Mar 26 '13 at 20:03

1 answer

Denys seguret · Answer 1 · 2013-03-26T20:06:22+0000

+ allows the js mechanism to make the difference between this function expression and the function definition.

For readability, we usually use

 (function() { return 10; })();