题目描述
请补全JavaScript代码,根据预设代码中的数组,实现以下功能:
实现:
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
head>
<body>
<button class='up'>销量升序button>
<button class='down'>销量降序button>
<ul>ul>
<script>
var cups = [
{ type: 1, price: 100, color: 'black', sales: 3000, name: '牛客logo马克杯' },
{ type: 2, price: 40, color: 'blue', sales: 1000, name: '无盖星空杯' },
{ type: 4, price: 60, color: 'green', sales: 200, name: '老式茶杯' },
{ type: 3, price: 50, color: 'green', sales: 600, name: '欧式印花杯' }
]
var ul = document.querySelector('ul');
var upbtn = document.querySelector('.up');
var downbtn = document.querySelector('.down');
// 补全代码
cups.forEach(ele=>{
const li=document.createElement('li')
li.innerText=ele.name;
ul.appendChild(li)
})
upbtn.onclick=function(){
const lis=document.querySelectorAll('li')
Array.from(lis).forEach(ele=>ul.removeChild(ele))
cups.sort((x,y)=>x.sales-y.sales)
cups.forEach(ele=>{
const li=document.createElement('li')
li.innerText=ele.name;
ul.appendChild(li)
})
}
downbtn.onclick=function(){
const lis=document.querySelectorAll('li')
Array.from(lis).forEach(ele=>ul.removeChild(ele))
cups.sort((x,y)=>y.sales-x.sales)
cups.forEach(ele=>{
const li=document.createElement('li')
li.innerText=ele.name;
ul.appendChild(li)
})
}
script>
body>
html>