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Interview.html
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Interview.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=0">
<meta name="renderer" content="webkit">
<title>js在线调试</title>
<meta name="description" content="首页描述"/>
<meta name="keywords" content="首页关键词"/>
<meta name="author" content="Web Layout:amu"/>
<meta name="format-detection" content="telephone=no,date=no,address=no,email=no,url=no"/>
<style>
h2{margin: 0;position: absolute;}
#block{
border: 2px solid #ccc;
padding: 10px;
}
/* 方法一 */
html,body{height: 100%;}
.layer{
display: flex;
justify-content: center;
align-items: center;
height: 100%;
border: 1px dashed chocolate;
overflow-y: auto;
}
/* 方法二
#block{
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%,-50%);
}*/
/* 方法三*/
/* #block{
position: absolute;
left: 50%;
top: 50%;
} */
</style>
</head>
<body>
<h2>不确定宽高块元素：上下左右居中</h2>
<ul id="list">
</ul>
<div class="layer">
<div id="block" contenteditable="true">
ss21ss21ss21ss2132132<br>
ss21ss21ss21ss2132132<br>
ss21ss21ss21ss2132132<br>
ss21ss21ss21ss2132132<br>
ss21ss21ss21ss2132132<br>
ss21ss21ss21ss2132132<br>
ss21ss21ss21ss2132132<br>
</div>
</div>
<script>
let listDom = document.querySelector('#list');
let str = ``
for(let i=0;i<10;i++){
str += `<li>${i}</li>`
}
listDom.innerHTML = `${str}`
const outPut = (evt) => {
console.log(evt,evt.target.innerText);
}
listDom.addEventListener('click',outPut)
// console.log(1,[] == false)
// console.log(2,{} == false)
// console.log(3,[])
// console.log([1]==[1])
let person1= {
name:'lili',
age:28,
say:function(){
return ['en','cn']
},
skils:['js','css','vue']
}
console.log(person1)
let person2 = deepClone(person1);
person2.name = 'tony'
person2.skils[3] = 'react';
person2.say = ()=>{
return ['en','cn','jp']
}
console.log(person2)
function deepClone(obj){
let o;
if (typeof obj === 'object') {
if (obj === null) {
o = null;
}else {
if (obj instanceof Array) {
o = [];
for (let i = 0, len = obj.length; i < len; i++) {
o.push(deepClone(obj[ i ]));
}
} else {
o = {};
for (var j in obj) {
o[ j ] = deepClone(obj[ j ]);
}
}
}
} else {
o = obj;
}
return o;
};
</script>
</body>
</html>