The closure of my understanding

After Rollo (http://heeroluo.net/) pointing ~ ~ and read the "effective JavaScript Item 11 Master Closure" This article, the closure has a clearer understanding of the. In order to avoid learning without thinking is not the case, write down my understanding of closures, the right to record.

1: The function can access variables outside of it.

function cupshow (color, weight) {    Console.log (' This cup: ' + ' + color + ' + weight);} function Cupmake (sourcefn) {    var color = ' Red ';    var weight = ' 50g ';    

The above code passes the Cupshow function as a parameter to Cupmake. The color variable and the weight variable are accessed inside Cupmake.

2: Closures can also be accessed after the function that created them returns.

function cupshow (color, weight) {    Console.log (' this cup: ' + ' + color + ' + weight);} function Cupmake (sourcefn) {    returnfunction() {        sourcefn.apply (this  , arguments);    };} var closure = Cupmake (cupshow);     Closure (//

After the Cupshow function is returned by Cupmake in the above code, Cupshow can still be accessed inside the anonymous function.

　　

　　

　　

My understanding of closures