Web Front-end
JS Tutorial
Complete example of JavaScript component development_javascript skills
Complete example of JavaScript component development_javascript skills
The examples in this article describe the techniques of JavaScript component development. Share it with everyone for your reference, the details are as follows:
Use JavaScript to build components according to object-oriented ideas.
Now take building a TAB component as an example.
Functionally speaking, a component includes a visual part and a logical control part; from a code structure perspective, a component includes a code part and a resource part (styles, pictures, etc.).
Features of components: high cohesion, low coupling (does not intersect with other code logic, can be inherited and included); encapsulation (hide private methods and variables); reusability (can be used repeatedly for assembly) more complex applications).
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>JS 组件</title>
<style>
.TabControl{
position:absolute;
}
.TabControl .tab-head{
height:22px;width:100%;
/* border-left: solid 0px #e0e0e0;border-right: solid 0px #e0e0e0;border-top: solid 0px #e0e0e0;border-bottom: solid 1px #e0e0e0; */
position:absolute;
z-index:9;
}
.TabControl ul{
position:absolute;
top:2px;
padding:0px;
margin:0px;
z-index:10;
}
.TabControl li{
list-style:none; /* 将默认的列表符号去掉 */
padding-left:10px; padding-right:10px;
margin:0;
float:left;
border: solid 1px #e0e0e0;
background-color:#ffffff;
height:20px;
cursor:default;
}
.TabControl li.selected{
border-bottom: solid 1px #ffffff;border-top: solid 1px #ff0000;
z-index:10;
}
.TabControl li.unselected{
border-bottom: solid 1px #e0e0e0;border-top: solid 1px #e0e0e0;
z-index:10;
}
.TabControl .pageSelected{
position:absolute;
display:block;
border: solid 1px #e0e0e0;
width:100%;height:100%;
z-index:1;
top:23px;
}
.TabControl .pageUnSelected{
display:none;
border: solid 1px #e0e0e0;
width:100%;height:100%;
z-index:1;
top:23px;
}
</style>
</head>
<body>
<script lang="javascript">
var TabControl = function(width, height){
var me = this;
//TAB控件容器，头，列表
var cbody,tabHead, ul;
//最后选中的TAB页
var lastSelectedPage = 0;
//TAB页管理容器
var pages = [];
/**
* 初始化函数
* param{tabCount}, 创建tab页的个数
*/
me.init = function(tabCount){
//创建TAB容器
cbody = document.createElement("DIV");
cbody.className = "TabControl";
cbody.style.width = width || "400px";
cbody.style.height = height || "300px";
//创建TAB控件头
tabHead= document.createElement("DIV");
tabHead.className = "tab-head";
cbody.appendChild(tabHead);
//创建TAB头
ul = document.createElement("UL");
tabHead.appendChild(ul);
//根据参数初始化TAB页，缺省创建2个TAB页
var tc = tabCount || 2;
for(var i=0;i<tc;i++){
me.insertPage(i,"tabPage" + i)
}
//缺省选中第一页
me.selectPage(0);
}
/**
* 插入TAB页
* param{idx},插入位置
* param{title},TAB页标题
*
*/
me.insertPage = function(idx,title){
if(parseInt(idx)>=0){
var li = document.createElement("LI");
li.className = "unselected";
li.innerText = title;
var chd = ul.childNodes[idx];
ul.insertBefore(li);
li.onclick = function(){
me.selectPage(getSelectedIndex(li));
}
//创建page
var page = document.createElement("DIV");
page.className = "pageUnSelected";
pages.push(page);
cbody.appendChild(page);
}
}
/*
* 内部函数
* 根据选中的对象，获取对应的TAB页索引
*/
function getSelectedIndex(li){
var chd = ul.childNodes;
for(var i=0;i<chd.length;i++){
if(chd[i] == li){
return i;
}
}
}
/**
* 选中某页
* param{idx},选中页的索引
*/
me.selectPage = function(idx){
if(parseInt(idx)>=0){
var lis = ul.childNodes;
alert(lastSelectedPage + ',' + idx);
lis[lastSelectedPage].className = "unselected";
lis[idx].className = "selected";
/*
for(var i=0;i<lis.length;i++){
if( i== idx){
lis[i].className = "selected";
} else{
alert('B:'+ i + ',' + lis[idx].innerText);
lis[i].className = "unselected";
}
}
*/
//隐藏无需显示的TAB页，显示选中的TAB页
pages[lastSelectedPage].className = "pageUnSelected";
pages[idx].className = "pageSelected";
lastSelectedPage = idx;
}
}
//在函数尾部调用初始化函数执行初始化
me.init();
//最后返回DOM对象
return cbody;
}
var tabControl = new TabControl();
document.body.appendChild(tabControl);
</script>
</body>
</html>
The final effect is as shown below:
I hope this article will be helpful to everyone in JavaScript programming.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1378
52
How to implement an online speech recognition system using WebSocket and JavaScript
Dec 17, 2023 pm 02:54 PM
How to use WebSocket and JavaScript to implement an online speech recognition system Introduction: With the continuous development of technology, speech recognition technology has become an important part of the field of artificial intelligence. The online speech recognition system based on WebSocket and JavaScript has the characteristics of low latency, real-time and cross-platform, and has become a widely used solution. This article will introduce how to use WebSocket and JavaScript to implement an online speech recognition system.
WebSocket and JavaScript: key technologies for implementing real-time monitoring systems
Dec 17, 2023 pm 05:30 PM
WebSocket and JavaScript: Key technologies for realizing real-time monitoring systems Introduction: With the rapid development of Internet technology, real-time monitoring systems have been widely used in various fields. One of the key technologies to achieve real-time monitoring is the combination of WebSocket and JavaScript. This article will introduce the application of WebSocket and JavaScript in real-time monitoring systems, give code examples, and explain their implementation principles in detail. 1. WebSocket technology
How to use JavaScript and WebSocket to implement a real-time online ordering system
Dec 17, 2023 pm 12:09 PM
Introduction to how to use JavaScript and WebSocket to implement a real-time online ordering system: With the popularity of the Internet and the advancement of technology, more and more restaurants have begun to provide online ordering services. In order to implement a real-time online ordering system, we can use JavaScript and WebSocket technology. WebSocket is a full-duplex communication protocol based on the TCP protocol, which can realize real-time two-way communication between the client and the server. In the real-time online ordering system, when the user selects dishes and places an order
How to implement an online reservation system using WebSocket and JavaScript
Dec 17, 2023 am 09:39 AM
How to use WebSocket and JavaScript to implement an online reservation system. In today's digital era, more and more businesses and services need to provide online reservation functions. It is crucial to implement an efficient and real-time online reservation system. This article will introduce how to use WebSocket and JavaScript to implement an online reservation system, and provide specific code examples. 1. What is WebSocket? WebSocket is a full-duplex method on a single TCP connection.
JavaScript and WebSocket: Building an efficient real-time weather forecasting system
Dec 17, 2023 pm 05:13 PM
JavaScript and WebSocket: Building an efficient real-time weather forecast system Introduction: Today, the accuracy of weather forecasts is of great significance to daily life and decision-making. As technology develops, we can provide more accurate and reliable weather forecasts by obtaining weather data in real time. In this article, we will learn how to use JavaScript and WebSocket technology to build an efficient real-time weather forecast system. This article will demonstrate the implementation process through specific code examples. We
Simple JavaScript Tutorial: How to Get HTTP Status Code
Jan 05, 2024 pm 06:08 PM
JavaScript tutorial: How to get HTTP status code, specific code examples are required. Preface: In web development, data interaction with the server is often involved. When communicating with the server, we often need to obtain the returned HTTP status code to determine whether the operation is successful, and perform corresponding processing based on different status codes. This article will teach you how to use JavaScript to obtain HTTP status codes and provide some practical code examples. Using XMLHttpRequest
How to use insertBefore in javascript
Nov 24, 2023 am 11:56 AM
Usage: In JavaScript, the insertBefore() method is used to insert a new node in the DOM tree. This method requires two parameters: the new node to be inserted and the reference node (that is, the node where the new node will be inserted).
How to get HTTP status code in JavaScript the easy way
Jan 05, 2024 pm 01:37 PM
Introduction to the method of obtaining HTTP status code in JavaScript: In front-end development, we often need to deal with the interaction with the back-end interface, and HTTP status code is a very important part of it. Understanding and obtaining HTTP status codes helps us better handle the data returned by the interface. This article will introduce how to use JavaScript to obtain HTTP status codes and provide specific code examples. 1. What is HTTP status code? HTTP status code means that when the browser initiates a request to the server, the service
