Home > Article > Web Front-end > JQuery's Pager implementation code_jquery
JQuery's Pager implementation code_jquery
- WBOYOriginal
- 2016-05-16 15:02:341574browse
The example in this article shares the specific implementation code of JQuery's Pager for your reference. The specific content is as follows
Rendering:
Code:
html code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>分页器</title>
<link href="pager.css" rel="stylesheet"/>
</head>
<body>
<div id="pager"></div>
<script src="pager.js"></script>
<script>
function doChangePage(obj){
//TO DO
}
var pagerBox = document.getElementById('pager');
var pager = new Pager({
index: 1,
total: 15,
parent: pagerBox,
onchange: doChangePage
});
</script>
</body>
</html>
css code:
.pager-box:after{
display:block;
height:0;
visibility:hidden;
clear:both;
content:'';
}
.pager{
float:left;
position:relative;
left:50%;
font-family:微软雅黑;
}
.pager a,.pager span{
position:relative;
left:-50%;
display:block;
float:left;
margin-left:5px;
border:1px solid #b6bcc1;
padding: 5px 10px;
text-decoration:none;
color:#b6bcc1;
border-radius:3px;
}
.pager span{
border:0;
}
.pager a.js-selected{
background:#b6bcc1;
color:#fff;
cursor:default;
}
.pager a.js-disabled{
background:#f1f1f1;
border-color:#f1f1f1;
cursor:default;
color:#fff;
}
pager.js code
(function(window, undefined){
/**
* 创建元素节点并返回
*/
function create(tagName, className, parent){
var element = document.createElement(tagName);
element.className = className;
parent.appendChild(element);
return element;
}
/**
* 数组消除重复
*/
function clearRepeat(arr){
var obj = {},
result = [];
for(var i = 0, len = arr.length; i < len; i++){
obj[arr[i]] = 1;
}
for(var i in obj){
result.push(i);
}
return result;
}
/**
* 添加类名
*/
function addClassName(element, className){
var aClass = element.className.split(' ');
aClass.push(className);
aClass = clearRepeat(aClass);
element.className = aClass.join(' ');
}
/**
* 删除类名
*/
function delClassName(element, className){
var aClass = element.className.split(' '),
index = aClass.indexOf(className);
if(index > 0) aClass.splice(index, 1);
element.className = aClass.join(' ');
}
/**
* 检查是否含有类名
* @param element
* @param className
* @returns {boolean}
*/
function hasClassName(element, className){
var aClass = element.className.split(' '),
index = aClass.indexOf(className);
if(index > 0) return true;
return false;
}
var Pager = function(obj){
this.__total = obj.total || 1;
this.__index = obj.index || 1;
this.__parent = obj.parent;
this.__onchange = obj.onchange;
//初始化分页器
this.__init(obj);
};
var pro = Pager.prototype;
/**
* 初始化分页器
*/
pro.__init = function(obj){
if(this.__total < this.__index) return;
//存储数字
this.__numbers = [];
//储存省略号
this.__dots = [];
this.__wrapper = create('div', 'pager-box', this.__parent);
this.__body = create('div', 'pager', this.__wrapper);
//存储上一页
this.__preBtn = create('a', 'prev', this.__body);
this.__preBtn.href = 'javascript:void(0);';
this.__preBtn.innerText = (obj.label && obj.label.prev) || '上一页';
//存储数字
if(this.__total < 8){
for(var i = 0; i < this.__total; i++){
var t = create('a', 'number', this.__body);
t.href = 'javascript:void(0);';
t.innerText = i + 1;
this.__numbers.push(t);
}
}else{
for(var i = 0; i < 2; i++){
var t = create('span', 'dots', this.__body);
t.innerText = '...';
this.__dots.push(t);
};
for(var i = 0; i < 7; i++){
var t = create('a', 'number', this.__body);
t.href = 'javascript:void(0);';
this.__numbers.push(t);
}
}
//存储下一页
this.__nextBtn = create('a', 'next', this.__body);
this.__nextBtn.href = 'javascript:void(0);';
this.__nextBtn.innerText = (obj.label && obj.label.next) || '下一页';
//
this._$setIndex(this.__index);
//
this.__body.onclick = this.__doClick.bind(this);
};
pro.__doClick = function(e){
var e = e || window.event,
target = e.target || e.srcElement;
//点击省略号
if(target.tagName.toLowerCase() == 'span') return;
//点击了不能点击的上一页或者下一页
if(hasClassName(target, 'js-disabled')) return;
//点击了当前页
if(hasClassName(target, 'js-selected')) return;
if(target == this.__preBtn){
//点击了上一页
this._$setIndex(this.__index - 1);
}else if(target == this.__nextBtn){
//点击了下一页
this._$setIndex(this.__index + 1);
}else{
//点击了数字
var index = target.innerText;
this._$setIndex(index);
}
};
/**
* 跳转页数
*/
pro._$setIndex = function(index){
index = parseInt(index);
//更新信息
if(index != this.__index){
this.__last = this.__index;
this.__index = index;
}
//处理
delClassName(this.__preBtn, 'js-disabled');
delClassName(this.__nextBtn, 'js-disabled');
if(this.__total < 8){
//总页数小于8的情况
if(this.__last) delClassName(this.__numbers[this.__last - 1], 'js-selected');
addClassName(this.__numbers[this.__index - 1], 'js-selected');
if(this.__index == 1) addClassName(this.__preBtn, 'js-disabled');
if(this.__index == this.__total) addClassName(this.__nextBtn, 'js-disabled');
}else{
this.__dots[0].style.display = 'none';
this.__dots[1].style.display = 'none';
for(var i = 0; i < 7; i++){
delClassName(this.__numbers[i], 'js-selected');
};
if(this.__index < 5){
for(var i = 0; i < 6; i++){
this.__numbers[i].innerText = i + 1;
}
this.__numbers[6].innerText = this.__total;
this.__dots[1].style.display = 'block';
this.__body.insertBefore(this.__dots[1], this.__numbers[6]);
addClassName(this.__numbers[this.__index - 1], 'js-selected');
if(this.__index == 1) addClassName(this.__preBtn, 'js-disabled');
}else if(this.__index > this.__total - 4){
for(var i = 1; i < 7; i++){
this.__numbers[i].innerText = this.__total + i -6;
}
this.__numbers[0].innerText = '1';
this.__dots[0].style.display = 'block';
this.__body.insertBefore(this.__dots[0], this.__numbers[1]);
addClassName(this.__numbers[this.__index + 6 - this.__total], 'js-selected');
if(this.__index == this.__total) addClassName(this.__nextBtn, 'js-disabled');
}else{
this.__numbers[0].innerText = '1';
for(var i = 1; i < 6; i++){
this.__numbers[i].innerText = this.__index - 3 + i;
if(i == 3) addClassName(this.__numbers[i], 'js-selected');
}
this.__numbers[6].innerText = this.__total;
this.__dots[0].style.display = 'block';
this.__body.insertBefore(this.__dots[0], this.__numbers[1]);
this.__dots[1].style.display = 'block';
this.__body.insertBefore(this.__dots[1], this.__numbers[6]);
}
}
if(typeof this.__onchange == 'function'){
this.__onchange({
index: this.__index,
last: this.__last,
total: this.__total
})
}
};
/**
* 得到总页数
*/
pro._$getIndex = function(){
return this.__index;
};
/**
* 得到上一个页数
*/
pro._$getLast = function(){
return this.__last;
};
//变成全局
window.Pager = Pager;
})(window);
Main idea:
The paginator is divided into the following 4 situations:
Case 1, when total
Case 2, when total >= 8 and index a93788d99a8b522ccbabe9eb69cf9f1f= 8 and 5 <= index <= total - 4, display 1 and the last page, and the 5 items in the middle.
Pass in a settings object when instantiating the Pager class:
{
parent: element, //给分页器设置父节点
index: index, //设置当前页
total: total, //设置总页数
onchange: function(){} //页数变化回调函数
}
When we instantiate Pager, execute the statements in the Pager function body, first assign the value, and then execute the initialization function:
var Pager = function(obj){
//赋值
this.__total = obj.total || 1;
this.__index = obj.index || 1;
this.__parent = obj.parent;
this.__onchange = obj.onchange;
//初始化分页器
this.__init(obj);
};
Initialization function this.__init structure:
Pager.prototype.__init = function(obj){
(根据上面分析的情况进行处理)
...
this._$setIndex(this.__index); //跳转到初始页
//绑定分页器点击函数
this.__body.onclick = this.__doClick.bind(this);
};
Initialization is completed. After clicking, the corresponding judgment will be made and this._$setIndex(index) will be used to jump.
For more articles on pagination tutorials, please check out the following topics:
javascript paging function operation
jquery paging function operation
php paging function operation
ASP.NET paging function operation
Download: paper
The above is the entire content of this article, I hope it will be helpful to everyone’s study.
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：js realizes the dragging effect of div on the page_javascript skillsNext article：js realizes the dragging effect of div on the page_javascript skills
Related articles
See more- An in-depth analysis of the Bootstrap list group component
- Detailed explanation of JavaScript function currying
- Complete example of JS password generation and strength detection (with demo source code download)
- Angularjs integrates WeChat UI (weui)
- How to quickly switch between Traditional Chinese and Simplified Chinese with JavaScript and the trick for websites to support switching between Simplified and Traditional Chinese_javascript skills