JavaScript Scope Anonymous invocation
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Example
Invoking a function as an anonymous function, this will be the global object (self in the browser).
function func() {
return this;
}
func() === window; // true
5
In ECMAScript 5's strict mode, this will be undefined if the function is invoked anonymously.
(function () {
"use strict";
func();
}())
This will output
undefined
