Native JavaScript-like examples of jquery

Last Update:2016-09-14 Source: Internet

Author: User

Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

<! DOCTYPE html>

<body>
<div>
<div class= "Wrap" >
<input type= "Text"/>
<input type= "Text"/>
<input type= "Text"/>
</div>
<div class= "Wrap" >
<input type= "Text"/>
<input type= "Text"/>
<input type= "Text"/>
</div>
<div class= "Wrap" >
<input type= "Text"/>
<input type= "Text"/>
<input type= "Text"/>
</div>
</div>
<div>
<div class= "Wrap" >
<input type= "Text"/>
<input type= "Text"/>
<input type= "Text"/>
</div>
<div class= "Wrap" >
<input type= "Text"/>
<input type= "Text"/>
<input type= "Text"/>
</div>
<div class= "Wrap" >
<input type= "Text"/>
<input type= "Text"/>
<input type= "Text"/>
</div>
</div>
<div>
<div class= "Wrap" >
<input type= "Text"/>
<input type= "Text"/>
<input type= "Text"/>
</div>
<div class= "Wrap" >
<input type= "Text"/>
<input type= "Text"/>
<input type= "Text"/>
</div>
<div class= "Wrap" >
<input type= "Text"/>
<input type= "Text"/>
<input type= "Text"/>
</div>
</div>
<script type= "Text/javascript" >
There are three types of parameters:
1. String: Selector
2.function:ready method
3. Native object: Native object to JQ object

//==================

Native object to JQ
function JQ (ARG) {
Array used to place native objects
This.elements = [];
Switch (typeof Arg) {
Case "string":
this.elements = Getele (ARG);
Break
Case "function":
Ready (ARG);
Break
Case "Object":
This.elements.push (ARG);
Break
}
}

JQ object transferred to native, take operation
JQ.prototype.get = function (index) {
Return this.elements[index];//Native JS object
return new JQ (This.elements[index]); JQ Object
}

$ ("div"). EQ (2);
EQ: Removes a native object from the JQ object and then turns it into a new JQ object

JQ.prototype.eq = function (index) {
return new JQ (This.elements[index]);
}
$ ("div"). EQ (2). CSS ()
//==================
$ ("input"). CSS (). CSS ().
function css () {
return this;
// }

//==================

Function Ready (FN) {
domcontentloaded notifications from the browser after DOM loading is complete
if (Window.addeventlistener) {
Window.addeventlistener ("domcontentloaded", FN, false);
} else {
Defer indicates that the script tag is loaded when the DOM is loaded.
Before you IE8, learn
var script = document.createelement ("script");
Script.defer = true;
var head = document.getElementsByTagName ("head") [0];
Head.appendchild (script);
Script.onreadystatechange = function () {
if (script.readystate = = "complete") {
FN ();
}
}
}
return window;
}

//===========================
$ ("xx xx xxx") Multilevel selector case
function Getele (selecter) {
var reg =/^\s+|\s+$/g;
Selecter = Selecter.replace (Reg, "");
arr = [XX,XX,XX];
var arr = selecter.split ("");
var parents = [Document];
var children = [];
Justification $ ("div. Wrap input") For example
First loop: Arr[i] is div,parents is Document,children is the div in the current document
Second cycle: Arr[i] Yes, wrap,parents is all the Div,children is all the Div.wrap
Third cycle: Arr[i] is input,parents is all the Div.wrap,children is all the div.wrap in the input

for (var i = 0; i < arr.length; i++) {
children = [];
for (var j = 0; J < Parents.length; J + +) {
Find class
if (/^\./.test (Arr[i])) {
var nodes = Getelebyclass (Parents[j], ARR[I].SUBSTR (1));
Console.log (nodes);
for (var k = 0; k < nodes.length; k++) {
Children.push (Nodes[k]);
//}
children = nodes;
Find ID
} else if (/^#/.test (Arr[i])) {
var nodes = Parens[j].getelementbyid (ARR[I].SUBSTR (1));
Children.push (nodes);
Find TagName
} else {
var nodes = Parents[j].getelementsbytagname (Arr[i]);
Console.log (nodes);
Console.log (nodes);
for (var k = 0; k < nodes.length; k++) {
Children.push (Nodes[k]);
//}
children = nodes;
}
}
Parents = children;
}
return children;
}
Getele ("div. Wrap input"); //=== === === === === === ===
$ ("div") when the parameters of JQ have only one level selector
function Getele (selecter) {
1. Remove the leading and trailing spaces
var reg =/^\s+|\s+$/g;
Selecter.replace (Reg, "");
2. Judging selector type
if (/^#/.test (Selecter)) {
ID Selector
return document.getElementById (Selecter);
} else if (/^./.test (Selecter)) {
Class Selector
Return Getelebyclass (Selecter);
} else {
Return document.getElementsByTagName (Selecter);
//}
//}

//=== === === === === === ===
Because Getelementsbyclassname has compatibility, it is handled separately

//============================
Console.log (typeof this);
Event ****************
Two parameters
1. Event name
2. Callback function
JQ.prototype.on = function (EventName, FN) {
for (var i = 0; i < this.elements.length; i++) {
Addevent (EventName, This.elements[i], FN);
}
}

Because Addeventlistner has compatibility issues, IE8 used Attachevent
function addevent (eventName, obj, fn) {
if (Obj.addeventlistener) {
Obj.addeventlistener (EventName, FN, false)
} else {
IE8 below
Obj.attachevent ("on" + EventName, fn)
}
}
JQ.prototype.click = function () {
for (var i = 0; i < this.elements.length; i++) {
Addevent ("Click", This.elements[i], FN);
//}
//}

css***************
JQ.prototype.css = function () {
There are two types of parameters when using CSS
1. There are two cases of one parameter
1) string $ ("div"). CSS ("color");
2) Object $ ("div"). css ({color: "Red"}), which means assigning a value to a style
2. Two parameters for direct to a style assignment $ ("div"). CSS ("Color", "red")
Switch (arguments.length) {
Case 1:
$ ("div"). css ({
Color: "Red",
Width: "100",
//})
if ((typeof arguments[0]) = = = "Object") {
Assign a value to a style
For (prop in Arguments[0]) {
for (var i = 0; i < this.elements.length; i++) {
SetStyle (This.elements[i], prop, Arguments[0][prop]);
}
}
} else {
To take a value from a style
/* may have more than one native object in the JQ object, take only the first style */
Return GetStyle (This.elements[0], arguments[0]);
}
Break
Case 2:

for (var i = 0; i < this.elements.length; i++) {
For example: $ ("div"). CSS ("Color", "red")
SetStyle (This.elements[i], arguments[0], arguments[1]);
}
Break
}
}

Get style
/*
1. Object to get the style
2. Style name */

function GetStyle (obj, stylename) {
if (window.getComputedStyle) {
return window.getComputedStyle (obj, null) [StyleName];
} else {
Ie8
Return Obj.currentstyle (StyleName);
}

}

Set style
/*
1. The object to assign a value to
2. Style name
3. The value of the style */
function SetStyle (obj, StyleName, stylevalue) {
var arr = ["Left", "right", "width", "height"];
for (var i = 0; i < arr.length; i++) {
If the style you want to set is within the range of the array, you need to take "px"
if (arr[i] = = stylename) {
If "px" is not in the value, add "px"
if (!/px/.test (Stylevalue)) {
Stylevalue = Stylevalue + "px";
}
}
}
Obj.style[stylename] = Stylevalue;
}

function $ (ARG) {
return new JQ (ARG);
}

Console.log (Getele ("div. Wrap input"));
Test
Console.log ($ ("div. Wrap input"));

$ ("div"). On ("click", Function () {
Alert ("Not about");
Event.cancelbubble = true;
//
//})

$ (". Wrap"). CSS ("BackgroundColor", "Red");
$ ("div"). css ({
BackgroundColor: "Yellow",
//})

$ (function () {
Alert ("Hello World");
Console.log ("Hello javaScript");
$ ("input"). EQ (0). CSS ("BackgroundColor", "Red");
$ ("input"). CSS ("BackgroundColor", "Red");
$ ("input"). Get (5). Style.backgroundcolor = "Blue";
$ ("input"). Get (9). CSS ("BackgroundColor", "yellow");
});
</script>
</body>

Native JavaScript-like examples of jquery

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

Sales Support

1 on 1 presale consultation

Chat Contact Sales
After-Sales Support

24/7 Technical Support 6 Free Tickets per Quarter Faster Response

Open a Ticket
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

Learn More

Native JavaScript-like examples of jquery

Contact Us

A Free Trial That Lets You Build Big!

Sales Support

After-Sales Support