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
const sortFn = (event)=>{
console.log(event);
while(ul.hasChildNodes()) {
ul.removeChild(ul.firstChild)
}
if(event == 'up') {
cups.sort((a, b) => {
return a.sales - b.sales;
});
}
if(event == 'down') {
cups.sort((a, b) => {
return b.sales - a.sales;
});
}
cups.map((item) => {
let lis = document.createElement("li");
lis.innerHTML = `${item.name}`
ul.appendChild(lis)
});
};
upbtn.onclick = function() {
sortFn('up')
}
downbtn.onclick = function() {
return sortFn('down')
}
</script>
</body>
</html>