js第五天-对象

2024-08-25 15:28

文章标签 对象 js 第五天

本文主要是介绍js第五天-对象，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

object

        let obj = {uname: 'pink',age: 18,gender: 'w'}

增

对象名.属性=新值

这个和cpp不一样，可以在大括号外面新增属性

    <script>let obj = {uname: 'pink',age: 18,gender: 'w'}obj.hobby = 'football'console.log(obj);</script>

删

delete

        delete obj.gender

查

对象名.属性

打印

    <script>let students = [{ name: '小明', age: 18, gender: '男', hometown: '河北省' },{ name: '小红', age: 19, gender: '女', hometown: '河南省' },{ name: '小刚', age: 17, gender: '男', hometown: '山西省' },{ name: '小丽', age: 18, gender: '女', hometown: '山东省' }]for (let i = 0; i <= students.length; i++) {console.log(i);console.log(students[i]);console.log(students[i].name);console.log(students[i].hometown);}</script>

打印学生信息表格

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><style>table {width: 600px;text-align: center;}table,th,td {border: 1px solid #ccc;border-collapse: collapse;}caption {font-size: 18px;margin-bottom: 10px;font-weight: 700;}tr {height: 40px;cursor: pointer;}table tr:nth-child(1) {background-color: #ddd;}table tr:not(:first-child):hover {background-color: pink;}</style>
</head><body><h2>学生信息</h2><p>将数据渲染到页面中...</p><table><caption>学生列表</caption><tr><th>序号</th><th>姓名</th><th>年龄</th><th>性别</th><th>家乡</th></tr><script>let students = [{ name: '小明', age: 18, gender: '男', hometown: '河北省' },{ name: '小红', age: 19, gender: '女', hometown: '河南省' },{ name: '小刚', age: 17, gender: '男', hometown: '山西省' },{ name: '小丽', age: 18, gender: '女', hometown: '山东省' }]for (let i = 0; i <= students.length; i++) {document.write(`<tr><td>${i + 1}</td><td>${students[i].name}</td><td>${students[i].age}</td><td>${students[i].gender}</td><td>${students[i].hometown}</td></tr>`)}</script></table>
</body></html>