题解 | #数组过滤#
数组过滤
https://www.nowcoder.com/practice/46d607f9bf64458daa8798339a7336d0
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
</head>
<body>
<select name="" id="" onchange="handleSelectChange(this.value)">
<option value="0">请选择销量范围</option>
<option value="1"><100</option>
<option value="2">100~500</option>
<option value="3">>500</option>
</select>
<ul>
<li>牛客logo马克杯</li>
<li>无盖星空杯</li>
<li>老式茶杯</li>
<li>欧式印花杯</li>
</ul>
<script>
var cups = [
{ type: 1, price: 100, color: 'black', sales: 60, name: '牛客logo马克杯' },
{ type: 2, price: 40, color: 'blue', sales: 100, 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 select = document.querySelector('select');
var ul = document.querySelector('ul');
// 补全代码
function handleSelectChange(val) {
switch(val) {
case '1': initUl(cups.filter(item => item.sales < 100)); break;
case '2': initUl(cups.filter(item => item.sales >= 100 && item.sales <= 500)); break;
case '3': initUl(cups.filter(item => item.sales > 500)); break;
}
}
function initUl(array) {
ul.innerHTML = '';
for (let i = 0 ; i < array.length; i++) {
let liEl = document.createElement('li');
liEl.innerHTML = array[i].name;
ul.appendChild(liEl);
}
}
</script>
</body>
</html>
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