JS in Dom and jquery $ test notes

Source: Internet
Author: User

A test dom and $ for the little Dongdong, just for keeping, not for anything else

The code is as follows Copy Code

The DOM is known

var J_top_bar = document.createelement ("div");

J_top_bar.style.cssText = ' Position:fixed;left:100px;top:100px;background-color: #fff; color: #000;p adding:10px; border:2px solid #09f; ';

Document.body.appendChild (J_top_bar);

J_top_bar.setattribute ("DATA-XL", 1);

j_top_bar.innerhtml = ' 1 ';

function A (argument) {
Do not have to simulate, trapped for
var that = this;
if (!that._mark) {
That._mark = 1;
Manipulating Dom
that.innerhtml = that.innerhtml * 1 + 1;

That.setattribute ("XL", That.getattribute ("XL") * 1 + 1);

Delete that._mark;//Remove logo

function B (argument) {

Simulate each click, because click inside to use $this = this;
var $this = JQuery (this);
if (! $this. Data ("Mark")) {
$this. Data ("Mark");

Manipulating Dom
$this. html (function (I, Val) {
Return val * 1 + 1;
}). attr ("Data-xl", $this. attr ("DATA-XL") * 1 + 1);


$this. Data ("Mark", 0);//Remove logo

var start = new Date-0;

Console.time ("Dom");
for (var i = 0;i<10000;i++) {
A.call (J_top_bar);
Console.timeend ("Dom");
Alert ("Dom:" + (new Date-0)-start)

start = new Date-0;

Console.time ("$");
for (var i = 0;i<10000;i++) {
B.call (J_top_bar);
Console.timeend ("$");
Alert ("$:" + ((new Date-0)-start)

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