JS Closed Package

1. Closures: Extend the scope of variables and save values that change at any time

Code:

<ul>

<li><a href= "#" > click on the No. 0 link </a></li>

<li><a href= "#" > click on the 1th link </a></li>

<li><a href= "#" > click on the 2nd link </a></li>

<li><a href= "#" > click on the 3rd link </a></li>

<li><a href= "#" > click on the 4th link </a></li>

</ul>

var links = document.getelementsbytagname (' a ');

Method 1:

function Closuretest (num) {

return function () {

Alert ("You clicked on the" + num + "link");

}

}

for (Var i=0;i<links.length;i++) {

Links[i].onclick = Closuretest (i);

}

Method 2:

for (Var i=0;i<links.length;i++) {

Links[i].onclick = (function (i) {

return function () {

Alert ("You clicked on the" + i + "link");

};

}) (i)

Method 3:

(function (i) {

Links[i].onclick = function () {

Alert ("You clicked on the" + i + "link");

//                 };

}) (i)

}

JS Closed Package