本文實例為大家分享了一個基於面向對象的分頁組件的具體實現代碼，供大家參考，具體內容如下
文字表達有限，直接上代碼了
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>一個基於面向對象的分頁組件</title>
<style>
html,body{padding:0;margin:0;}
p{padding:0;margin:0;}
a{text-decoration: none}
.Paging{overflow: hidden;}
.Paging-item{float: left;padding: 10px 15px;background: #4caf50;color: #fff;margin-left: 5px;}
.Paging-item-active{background: #ff568e;}
</style>
</head>
<body>
<div id="page"></div>
</body>
<script>
//分頁組件類
function Paging(container,opt){
//自定義事件
this.eventHandlers={};
//默認設置
this.config={
nowNum: 1,
allNum: 10,
callback: function(){}
}
if(opt){
this.extend(this.config,opt);
}
//外層容器
this.Box= null;
//渲染組件
this.render(container);
}
Paging.prototype={
constructor: Paging,
/*綁定自定義事件*/
on: function(eventType,eventHandler){
if(typeof this.eventHandlers[eventType] === 'undefined'){
this.eventHandlers[eventType]= [];
}
this.eventHandlers[eventType].push(eventHandler);
},
/*觸發自定義事件*/
fire: function(eventType){
if( this.eventHandlers[eventType] instanceof Array){
var len= this.eventHandlers[eventType].length;
for(var i=0;i<len;i++){
this.eventHandlers[eventType][i]();
}
}
},
/*渲染UI結構*/
renderUI: function(){
this.Box= document.createElement('div');
this.Box.className= 'Paging';
var nowNum= this.config.nowNum;
var allNum= this.config.allNum;
//當前頁大於或等於4，第一頁才能隱藏，總數大於5才能顯示首頁
if (nowNum >=4 && allNum >=6) {
var pageA= document.createElement('a');
pageA.className= 'Paging-item Paging-item-start'
pageA.href='#1';
pageA.innerHTML= '首頁';
this.Box.appendChild(pageA);
};
//當前頁只要不是第一頁就顯示上一頁
if(nowNum>=2){
var pageA= document.createElement('a');
pageA.className= 'Paging-item Paging-item-pre'
pageA.href='#'+ (nowNum-1);
pageA.innerHTML= '上一頁';
this.Box.appendChild(pageA);
}
//只有5頁時
if(allNum<=5){
for(var i=1;i<=allNum;i++){
var pageA= document.createElement('a');
pageA.className= 'Paging-item'
pageA.href= '#'+ i;
if(nowNum==i){
pageA.className= 'Paging-item Paging-item-active'
pageA.innerHTML=i;
}else{
// pageA.innerHTML='['+ i +']';
pageA.innerHTML=i;
}
this.Box.appendChild(pageA);
}
}else{
for(var i=1;i<=5;i++){
var pageA= document.createElement('a');
pageA.className= 'Paging-item'
pageA.href= '#'+ (nowNum-3+i);
//對當前頁為前2頁的處理
if(nowNum === 1 || nowNum === 2){
pageA.href= '#'+ i;
if(nowNum === i){
pageA.className= 'Paging-item Paging-item-active'
pageA.innerHTML= i;
}else{
// pageA.innerHTML= '['+i+']';
pageA.innerHTML= i;
}
}/*對當前頁為後2頁的處理*/else if((allNum-nowNum) ===0 || (allNum-nowNum) === 1){
/*==
<a href="">[6]</a>
<a href="">[7]</a>
<a href="">[8]</a>
<a href="">[9]</a>
<a href="">10</a>
==*/
pageA.href= '#'+ ((allNum-5)+i);
if((allNum-nowNum) ===0 && i===5){
pageA.className= 'Paging-item Paging-item-active'
pageA.innerHTML=((allNum-5)+i);
}else if((allNum-nowNum) ===1 && i===4){
pageA.className= 'Paging-item Paging-item-active'
pageA.innerHTML=((allNum-5)+i);
}else{
// pageA.innerHTML= '['+ ((allNum-5)+i) +']'
pageA.innerHTML= ((allNum-5)+i)
}
}else{
if(nowNum === (nowNum-3+i)){
pageA.className= 'Paging-item Paging-item-active'
pageA.innerHTML= (nowNum-3+i);
}else{
// pageA.innerHTML= '['+ (nowNum-3+i) +']'
pageA.innerHTML= (nowNum-3+i)
}
}
this.Box.appendChild(pageA);
}
}
if((allNum-nowNum) >=1){
var pageA= document.createElement('a');
pageA.className= 'Paging-item Paging-item-next'
pageA.href='#'+ (nowNum+1);
pageA.innerHTML= '下一頁';
this.Box.appendChild(pageA);
}
//選擇7為標准，或7以下才能顯示
if((allNum-nowNum) >= 3 && allNum >= 6){
var pageA= document.createElement('a');
pageA.className= 'Paging-item Paging-item-end'
pageA.href='#'+allNum;
pageA.innerHTML= '尾頁';
this.Box.appendChild(pageA);
}
},
/*為UI綁定事件*/
bindUI: function(){
var self= this;
this.config.callback(this.config.nowNum,this.config.allNum);
//利用事件委托
self.Box.onclick= function(e){
var e= e || window.event;
var target= e.target || e.srcElement;
if(typeof e.target.getAttribute('href') === 'string'){
var nowNum= parseInt(target.getAttribute('href').substring(1));
// console.log(nowNum);
self.Box.innerHTML= '';
new Paging(null,{
nowNum: nowNum,
allNum: self.config.allNum,
callback: self.config.callback
})
}
return false;
}
},
/*渲染UI*/
render: function(container){
this.renderUI();
this.bindUI();
if(container){
var con= document.getElementById(container);
con.appendChild(this.Box);
}else{
document.body.appendChild(this.Box);
}
},
/*繼承對象*/
extend: function(obj1,obj2){
for(attr in obj2){
obj1[attr]= obj2[attr];
}
}
}
//初始化調用
var page= new Paging(null,{
nowNum: 1,
allNum: 10,
callback: function(nowNum,allNum){
console.log('當前頁：'+nowNum)
console.log('總頁：'+allNum)
}
});
</script>
</html>
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持。