Why does an anonymous function need to be wrapped in parentheses?

Question

JavaScript

why write like that?

;(function (argument) {
  // some code
})

Answer 1

In the case of code concatenation from multiple files by assemblers, where this may lead to an error in the resulting code. Specifically, in this example, the function is meaningless. it cannot be called.

Answer 2

Because you wrote it wrong
Anonymous function calls itself
So right:

;(function (argument) {
  // some code
})()