题解 | #数组排序#
数组排序
https://www.nowcoder.com/practice/18ea36ef9b0c470e9db7681eced6e8df
<!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
//先遍历数组，让其ul中循环遍历li且有cups的name属性
for(let i=0;i<cups.length;i++){
let li = document.createElement('li')
li.innerHTML = cups[i].name
ul.append(li)
}
//获取所有的li元素
var lis = document.querySelectorAll('li')
upbtn.onclick = function(){
cups.sort((a,b) => {return a.sales - b.sales})
for(let i =0;i<cups.length;i++){
//排序之后重新渲染到对应的li上
lis[i].innerHTML = cups[i].name
}
}
downbtn.onclick = function(){
cups.sort((a,b) => {return b.sales - a.sales})
for(let i =0;i<cups.length;i++){
lis[i].innerHTML = cups[i].name
}
}
</script>
</body>
</html>
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