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tekaratzas/anonymouswrappers.js

Last active July 24, 2017 13:56
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Anonymous Wrappers and Namespaces
Raw
anonymouswrappers.js
(
// evaluate the function in the parenthesis
function(){}
// return the evaluated function object
)() // call it immediately
// The same functionality can be done as follows;
!function(){}()
+function(){}()
(function(){}());
// PRO TIP:
// if some jerk on your team does this. AKA overwrites the global variable "undefined"
console.log(typeof undefined === "undefined") // true
var undefined = 123;
console.log(typeof undefined === "undefined") // this is false! undefined is overwritten and replaced by the number 123
// you can avoid a catastrophe by using an anonymous wrapper.
(function(undefined){console.log(undefined);})();
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