js实现简单商品筛选功能
时间：2021-10-20 08:14:39 | 栏目：JavaScript代码 | 点击：次
本文实例为大家分享了js实现商品筛选功能的具体代码，供大家参考，具体内容如下
应用场景：商品筛选
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
list-style: none;
text-decoration: none;
}
.choose {
width: 500px;
height: auto;
margin: auto;
}
.choose nav {
height: 50px;
background-color: red;
}
.choose nav span {
margin: 0 5px;
}
.choose .show {
color: red;
}
.choose ul li {
border: 1px solid black;
}
.choose ul li a {
box-sizing: border-box;
display: inline-block;
width: 40px;
border-left: 1px solid black;
margin: 5px;
padding-left: 5px;
}
</style>
</head>
<body>
<div class="choose">
<nav></nav>
<ul>
<li>
<strong>手机:</strong>
<a href="javascript:;">小米</a>
<a href="javascript:;">华为</a>
<a href="javascript:;">apple</a>
<a href="javascript:;">OPPO</a>
<a href="javascript:;">vivo</a>
</li>
<li>
<strong>价格:</strong>
<a href="javascript:;">3200</a>
<a href="javascript:;">2600</a>
<a href="javascript:;">899</a>
<a href="javascript:;">2799</a>
<a href="javascript:;">2299</a>
</li>
<li>
<strong>屏幕:</strong>
<a href="javascript:;">399</a>
<a href="javascript:;">600</a>
<a href="javascript:;">800</a>
<a href="javascript:;">1200</a>
</li>
</ul>
</div>
</body>
</html>
<script type="text/javascript">
var li = document.querySelectorAll('li');
var stack = []; //存放三个类别的option
for (var i = 0; i < li.length; i++) {
// 获取每个li中的option进行处理
var options = li[i].querySelectorAll("a");
for (var j = 0; j < options.length; j++) {
// 当选项被点击时，传入点击的类别是第几个li的
// options[j].onclick = Aclick.bind(options[j], [i]); //1. 将点击事件分离出去
options[j].onclick = Bclick(i); //2. 将点击事件分离出去
}
}
</script>
当写到这里的时候想要把这个事件函数分离出去，但是有参数。于是问题出现
如何将一个带参数的事件函数分离出去？？？
于是乎：就有了以下两种方法
1、使用bind改变this指向后返回一个不执行的函数
function Aclick(index) {
// 删掉nav
var choose = document.querySelector('.choose');
var nav = document.querySelector(".choose nav");
choose.removeChild(nav);
// 使用stack重新添加
stack[index] = this.innerHTML;
var nav = document.createElement("nav");
for (k = 0; k < stack.length; k++) {
if (stack[k] != "" && stack[k] != undefined) { //略过stack中的空项，重新向nav中添加span
var span = document.createElement("span");
var a = document.createElement("a");
a.innerHTML = "X";
a.href = "javascript:void(0);";
span.innerHTML = stack[k];
a.onclick = function() {
stack[index] = "";
nav.removeChild(this.parentNode);
}
span.appendChild(a);
nav.appendChild(span);
}
}
choose.insertBefore(nav, choose.children[0]);
}
2、在注册函数外面套一层函数将注册函数返回
function Bclick(index) {
return function() {
// 删掉nav
var choose = document.querySelector('.choose');
var nav = document.querySelector(".choose nav");
choose.removeChild(nav);
// 使用stack重新添加
stack[index] = this.innerHTML;
var nav = document.createElement("nav");
for (k = 0; k < stack.length; k++) {
if (stack[k] != "" && stack[k] != undefined) { //略过stack中的空项，重新向nav中添加span
var span = document.createElement("span");
var a = document.createElement("a");
a.innerHTML = "X";
a.href = "javascript:void(0);";
span.innerHTML = stack[k];
a.onclick = function() {
stack[index] = "";
nav.removeChild(this.parentNode);
}
span.appendChild(a);
nav.appendChild(span);
}
}
choose.insertBefore(nav, choose.children[0]);
}
}