JavaScript anonymous function closure

anonymous functions

(function () {
Console.info ("111111111");
})();

var my = (function () {
return "11111111";
})();

function to put anonymous function called closure

function my () {
return function () {
Return "Zhang San";
}
}

Console.info (My () ());

Advantages of closures, avoiding the use of global variables, providing access to local variables

Save the local variables.

function box () {
var age = 100;

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

}

var b = box ();
b ();
b ();
b ();

function Box1 () {

var arr = [];

for (Var i=0;i<5;i++) {
Arr[i] = (function (num) {
return num;
}) (i)

}
return arr;

}

var my = function () {
return "11111111";
}();

Closures are in the global direction of window,

var name = "Global";
var user ={
Name: "Zhang San",
Getuser:function () {
var = this;
return function () {
Return that.name;//returns the properties of the user object, not the global
}
}
}

Block-level scope, (function () {

}）（）;

JavaScript anonymous function closure