原生js实现下拉框功能(支持键盘事件)


Posted in Javascript onJanuary 13, 2017

话不多说,请看代码:

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>倒计时-多种格式调用-原生js封装</title>
 <link rel="shortcut icon" href="../public/image/favicon.ico" type="images/x-icon"/>
 <link rel="icon" href="../public/image/favicon.png" type="images/png"/>
 <link rel="stylesheet" type="text/css" href="../public/style/cssreset-min.css">
 <link rel="stylesheet" type="text/css" href="../public/style/common.css">
 <style type="text/css">
 /*公共*/
 html{
 height:100%;
 }
 body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, textarea, p, blockquote, th, td {
 margin: 0;
 padding: 0
 }
 ol, ul {
 list-style: none
 }
 body{
 position: relative;
 min-height:100%;
 font-size:14px;
 font-family: Tahoma, Verdana,"Microsoft Yahei";
 color:#333;
 }
 a{
 text-decoration: none;
 color:#333;
 }
 .header{
 width: 960px;
 padding-top: 15px;
 margin: 0 auto;
 line-height: 30px;
 text-align: right;
 }
 .header a{
 margin: 0 5px;
 }
 .main{
 width:960px;
 margin: 50px auto 0;
 }
 .code{
 border:1px dashed #e2e2e2;
 padding:10px 5px;
 margin-bottom:25px;
 }
 pre {
 font-family: "Microsoft Yahei",Arial,Helvetica;
 white-space: pre-wrap; /*css-3*/ 
 white-space: -moz-pre-wrap; /*Mozilla,since1999*/ 
 white-space: -pre-wrap; /*Opera4-6*/ 
 white-space: -o-pre-wrap; /*Opera7*/ 
 word-wrap: break-word; /*InternetExplorer5.5+*/
 }
 .example{
 padding-top:40px;
 margin-bottom:90px;
 }
 .example .call{
 padding:18px 5px;
 background:#f0f5f8;
 }
 .example h2{
 padding-top:20px;
 margin-bottom:7px;
 }
 .example table {
 width:100%;
 table-layout:fixed;
 border-collapse: collapse;
 border-spacing: 0;
 border: 1px solid #cee1ee;
 border-left: 0;
 }
 .example thead {
 border-bottom: 1px solid #cee1ee;
 background-color: #e3eef8;
 }
 .example tr {
 line-height: 24px;
 font-size: 13px;
 }
 .example tr:nth-child(2n) {
 background-color: #f0f5f8;
 }
 .example tr th,.example tr td {
 border-left: 1px solid #cee1ee;
 word-break: break-all;
 word-wrap: break-word;
 padding:0 10px;
 font-weight: normal;
 }
 .example tr th {
 color: #555;
 padding-top: 2px;
 padding-bottom: 2px;
 text-align: left;
 }
 /*公共*/
 .select-container {
 width: 186px;
 margin: 80px 0;
 position: relative;
 z-index: 10000;
 }
 .select-container .select-pose {
 width: 150px;
 height: 24px;
 line-height: 24px;
 display: block;
 color: #807a62;
 cursor: pointer;
 font-style: normal;
 padding-left: 4px;
 padding-right: 30px;
 border: 1px solid #333333; /* background: url(xjt.png) no-repeat right center; */
 }
 .select-pose:before {
 content: '';
 position: absolute;
 right: 7px;
 bottom: 7px;
 width: 0;
 height: 0;
 border-width: 4px;
 border-style: solid;
 border-color: #888 transparent transparent transparent;
 transition: all 0.2s;
 -webkit-transition: all 0.2s;
 -moz-transition: all 0.2s;
 -o-transition: all 0.2s;
 -ms-transition: all 0.2s;
 transform-origin: 50% 25%;
 -ms-transform-origin: 50% 25%;
 -moz-transform-origin: 50% 25%;
 -webkit-transform-origin: 50% 25%;
 -o-transform-origin: 50% 25%;
 }
 .extended.select-pose:before {
 transform: rotate(180deg);
 -webkit-transform: rotate(180deg);
 -moz-transform: rotate(180deg);
 -o-transform: rotate(180deg);
 -ms-transform: rotate(180deg);
 }
 .select-container .select-content {
 width: 184px;
 border: 1px solid #333333;
 background-color: #ffffff;
 position: absolute;
 z-index: 20000;
 margin-top: -1px;
 display: none;
 overflow: hidden;
 }
 .select-list{
 cursor: pointer;
 height: 24px;
 line-height: 24px;
 padding-left: 10px;
 }
 </style>
 <script type="text/javascript">
 /*封装代码*/
 (function() {
 var Select = function(el, opts) {
 var self = this;
 var defaults = {
 before: '#fff',
 after:'#ccc'
 }
 opts = opts || {};
 for (var w in defaults) {
 if ("undefined" == typeof opts[w]) {
 opts[w] = defaults[w];
 }
 }
 this.params = opts;
 this.container = r(el);

 if (this.container.length > 1) {
 var x = [];
 return this.container.each(function() {
 x.push(new Select(this, opts))
 }), x
 }
 this.containers=this.container[0];
 this.pose=this.container.find(".select-pose")[0];
 this.content=this.container.find(".select-content")[0];
 this.list=this.container.find(".select-list");
 this.index=-1;
 this.init();
 }
 Select.prototype = {
 //初始化
 init: function() {
 var self = this;
 this.page();
 this.event();
 this.mover();
 },
 event:function(){
 var self = this;
 self.pose.addEventListener('click', function(e) {
 e = e || window.event;
 e.stopPropagation ? e.stopPropagation() : e.cancelBubble = true;
 var oSrc = e.srcElement || e.target;
 if(oSrc.className.indexOf('extended') > -1){
 self.resetM();
 }else{
 oSrc.classList.add("extended");
 self.content.style.display = "block";
 }
 }, false);
 },
 //鼠标经过list
 mover:function(){
 var self = this;
 var list=this.list;
 for (var i = 0; i < list.length; i++) {
 !function(i){
 list[i].addEventListener('mouseover', function(e) {
 self.resetA();
this.style.background = self.params.after;
 self.index=i;
 }, false);
 }(i)
 list[i].addEventListener('click', function(e) {
 self.pose.innerHTML = this.innerHTML;
 }, false);
 }
 },
 resetA:function(){
 var self = this;
 var list=this.list;
 for (var i = 0; i < list.length; i++) {
 list[i].style.background = self.params.before;
 }
 },
 resetM:function(){
 var self = this;
 self.content.style.display = "none";
 self.pose.classList.remove("extended");
 self.resetA();
 },
 // 点击页面空白处时
 page:function(){
 var self = this;
 document.addEventListener('click', function(e) {
 self.resetM();
 }, false);
 document.addEventListener('keydown', function(e) {
 e = e || window.event;
 var keyVel=e.keyCode;
 if (keyVel == 38 || keyVel == 37) {
 e.preventDefault ? e.preventDefault() : e.returnValue = false;//取消事件默认行为
 self.index--;
 if (self.index < 0) {
 self.index = self.list.length-1;
 }
 self.resetA();
 self.list[self.index].style.backgroundColor = self.params.after;
 } else if (keyVel == 39 || keyVel == 40) {
 e.preventDefault ? e.preventDefault() : e.returnValue = false;//取消事件默认行为
 self.index++;
 if (self.index > self.list.length-1) {
 self.index = 0;
 }
 self.resetA();
 self.list[self.index].style.backgroundColor = self.params.after;
 }else if(keyVel == 13 && self.index != -1){
 e.preventDefault ? e.preventDefault() : e.returnValue = false;
 self.pose.innerHTML = self.list[self.index].innerHTML;
 self.index = -1;
 self.resetA();
 self.resetM();
 }
 }, false);
 },
 }
 var r = (function() {
 var e = function(e) {
 var a = this,
 t = 0;
 for (t = 0; t < e.length; t++) {
 a[t] = e[t];
 }
 return a.length = e.length, this
 };
 e.prototype = {
 addClass: function(e) {
 if ("undefined" == typeof e) return this;
 for (var a = e.split(" "), t = 0; t < a.length; t++)
 for (var r = 0; r < this.length; r++) this[r].classList.add(a[t]);
 return this
 },
 each: function(e) {
 for (var a = 0; a < this.length; a++) e.call(this[a], a, this[a]);
 return this
 },
 html: function(e) {
 if ("undefined" == typeof e) return this[0] ? this[0].innerHTML : void 0;
 for (var a = 0; a < this.length; a++) this[a].innerHTML = e;
 return this
 },
 find: function(a) {
 for (var t = [], r = 0; r < this.length; r++)
 for (var i = this[r].querySelectorAll(a), s = 0; s < i.length; s++) t.push(i[s]);
 return new e(t)
 },
 append: function(a) {
 var t, r;
 for (t = 0; t < this.length; t++)
 if ("string" == typeof a) {
 var i = document.createElement("div");
 for (i.innerHTML = a; i.firstChild;) this[t].appendChild(i.firstChild)
 } else if (a instanceof e)
 for (r = 0; r < a.length; r++) this[t].appendChild(a[r]);
 else this[t].appendChild(a);
 return this
 },
 }
 var a = function(a, t) {
 var r = [],
 i = 0;
 if (a && !t && a instanceof e) {
 return a;
 }
 if (a) {
 if ("string" == typeof a) {
 var s, n, o = a.trim();
 if (o.indexOf("<") >= 0 && o.indexOf(">") >= 0) {
 var l = "div";
 for (0 === o.indexOf("<li") && (l = "ul"), 0 === o.indexOf("<tr") && (l = "tbody"), (0 === o.indexOf("<td") || 0 === o.indexOf("<th")) && (l = "tr"), 0 === o.indexOf("<tbody") && (l = "table"), 0 === o.indexOf("<option") && (l = "select"), n = document.createElement(l), n.innerHTML = a, i = 0; i < n.childNodes.length; i++) r.push(n.childNodes[i])
 } else
 for (s = t || "#" !== a[0] || a.match(/[ .<>:~]/) ? (t || document).querySelectorAll(a) : [document.getElementById(a.split("#")[1])], i = 0; i < s.length; i++) s[i] && r.push(s[i])
 } else if (a.nodeType || a === window || a === document) {
 r.push(a);
 } else if (a.length > 0 && a[0].nodeType) {
 for (i = 0; i < a.length; i++) {
 r.push(a[i]);
 }
 }
 }
 return new e(r)
 };
 return a;
 }())
 window.select = Select;
 })()
 /*封装代码*/
 </script>
</head>
<body>
 <div class="header">
 <a href="https://github.com/huanghanzhilian/widget" target="_blank">项目地址</a>
 <a href="/widget/">返回首页</a>
 </div>
 <div class="main">
 <div class="select-container" id="select1">
 <cite class="select-pose">请选择分类</cite>
 <ul class="select-content">
 <li class="select-list">选项一</li>
 <li class="select-list">选项二</li>
 <li class="select-list">选项三</li>
 <li class="select-list">选项四</li>
 </ul>
 </div>
 <script type="text/javascript">
 new select("#select1");
 </script>
 <div class="code">
 <p>
 支持键盘事件,执行默认参数,鼠标点击分类显示,鼠标经过list执行默认参数
 </p>
 <p>new select("#select1");</p>
 </div>
 <div class="example">
 <div class="call">
 <h1>调用方法:</h1>
 <p>new select(selector,{options});</p>
 </div>
 <h2>options参数</h2>
 <table>
 <thead>
 <tr>
 <th width="150">参数</th>
 <th width="100">默认值</th>
 <th>说明</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td>before</td>
 <td>'#fff'</td>
 <td>鼠标经过list初始化颜色色值</td>
 </tr>
 <tr>
 <td>after</td>
 <td>'#ccc'</td>
 <td>鼠标经过list颜色色值</td>
 </tr>
 </tbody>
 </table>
 </div>
 </div>
</body>
</html>

以上就是本文的全部内容,希望本文的内容对大家的学习或者工作能带来一定的帮助,同时也希望多多支持三水点靠木!

Javascript 相关文章推荐
jsp+javascript打造级连菜单的实例代码
Jun 14 Javascript
jquery事件与绑定事件
Mar 16 Javascript
Bootstrap学习笔记 轮播(Carousel)插件
Mar 21 Javascript
jQuery Ajax 实现分页 kkpager插件实例代码
Aug 10 jQuery
JavaScript编写的网页小游戏,很给力
Aug 18 Javascript
使用react-router4.0实现重定向和404功能的方法
Aug 28 Javascript
微信小程序带动画弹窗组件使用方法详解
Nov 27 Javascript
vue路由中前进后退的一些事儿
May 18 Javascript
vue props对象validator自定义函数实例
Nov 13 Javascript
js中复选框的取值及赋值示例详解
Oct 18 Javascript
解决antd datepicker 获取时间默认少8个小时的问题
Oct 29 Javascript
在js中修改html body的样式
Nov 11 Javascript
js实现自动轮换选项卡
Jan 13 #Javascript
Javascript 使用ajax与C#获取文件大小实例详解
Jan 13 #Javascript
详解angularJs中自定义directive的数据交互
Jan 13 #Javascript
微信小程序 MD5加密登录密码详解及实例代码
Jan 12 #Javascript
很棒的一组js图片轮播特效
Jan 12 #Javascript
微信小程序 页面跳转传递值几种方法详解
Jan 12 #Javascript
微信小程序 详解Page中data数据操作和函数调用
Jan 12 #Javascript
You might like
解析wamp5下虚拟机配置文档
2013/06/27 PHP
ThinkPHP缓存方法S()概述
2014/06/13 PHP
PHP 前加at符合@的作用解析
2015/07/31 PHP
弹出模态框modal的实现方法及实例
2017/09/19 PHP
删除重复数据的算法
2006/11/23 Javascript
Javascript优化技巧(文件瘦身篇)
2008/01/28 Javascript
setInterval 和 setTimeout会产生内存溢出
2008/02/15 Javascript
通用JS事件写法实现代码
2009/01/07 Javascript
javascript 面向对象编程基础:继承
2009/08/21 Javascript
javascript 限制输入脚本大全
2009/11/03 Javascript
javascript 日期时间 转换的方法
2013/02/21 Javascript
javascript判断是手机还是电脑访问网页的简单实例分享
2014/06/03 Javascript
JavaScript分秒倒计时器实现方法
2015/02/02 Javascript
jquery实现增加删除行的方法
2015/02/03 Javascript
AngularJS中实现用户访问的身份认证和表单验证功能
2016/04/21 Javascript
预防网页挂马的方法总结
2016/11/03 Javascript
jQuery常用选择器详解
2017/07/17 jQuery
微信小程序实现横向增长表格的方法
2018/07/24 Javascript
vue实现跨域的方法分析
2019/05/21 Javascript
python调用cmd命令行制作刷博器
2014/01/13 Python
Python3利用SMTP协议发送E-mail电子邮件的方法
2017/09/30 Python
python实现在cmd窗口显示彩色文字
2019/06/24 Python
python爬虫项目设置一个中断重连的程序的实现
2019/07/26 Python
浅谈python3中input输入的使用
2019/08/02 Python
Numpy与Pytorch 矩阵操作方式
2019/12/27 Python
pyqt5 QlistView列表显示的实现示例
2020/03/24 Python
纽约通行卡:The New York Pass(免费游览纽约90多个景点)
2017/07/29 全球购物
团支书的期末学习总结自我评价
2013/11/01 职场文书
关于圣诞节的广播稿
2014/01/26 职场文书
2014年迎新年联欢会活动策划方案
2014/02/26 职场文书
优秀班集体先进事迹材料
2014/05/28 职场文书
2015年农村党员干部主题教育活动总结
2015/03/25 职场文书
资料员岗位职责范本
2015/04/13 职场文书
六一儿童节园长致辞
2015/07/31 职场文书
街道办残联2016年助残日活动总结
2016/04/01 职场文书
spring cloud gateway中如何读取请求参数
2021/07/15 Java/Android