Introduction to immediate execution function expressions in JavaScript_javascript skills

We are used to seeing this anonymous function

Copy code The code is as follows:

(function(){
console.log("test");
})();

What I have been calling before is self-executing anonymous function

I found out that there is another name: Immediately-Invoked Function Expression (IIFE, Immediately-Invoked Function Expression)

Call function expression immediately

Compared with self-executing anonymous functions, the meaning of immediately calling function expressions is clearer.

Self-executing functions include the following examples:

Copy code The code is as follows:

function foo() { foo(); }

and

Copy code The code is as follows:

var foo = function() { arguments.callee(); };

More importantly, something like the following might be a self-executing anonymous function

Copy code The code is as follows:

var foo = function() { foo(); };