js实现简单商品筛选功能

Z时代
2024-01-10
分类：IT

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>
 <span>手机:</span>
 <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>
 <span>价格:</span>
 <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>
 <span>屏幕:</span>
 <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]);
 }
}