情深已缘浅 2022-05-04 13:56:04
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<span></span>
<br>
<input type="text" oninput="input(event)">
<script>
let spanEl = document.querySelector('span')
let inputEl = document.querySelector('input')
let data = {
val: null
}
let proxy = new Proxy(data, {
get(target, p, receiver) {
return Reflect.get(target, p, receiver)
},
set(target, p, val, receiver) {
spanEl.innerText = val
inputEl.value = val
return Reflect.set(target, p, val, receiver)
}
})
function input(e) {
proxy.val = e.target.value
}
</script>
</body>
</html>情深已缘浅 2022-05-02 22:07:58
这样是不是也可以判断是否是空对象呢？
function isEmptyObject(obj) {
return !!obj ? (Object.keys(obj).length === 0) : true;
}- 共 1 页
- 1
去重后还要保证数组的长度是不是10...
第 67 题：随机生成一个长度为 10 的整数类型的数组