【前端】JavaScript學習筆記（四）——面向物件程式設計
阿新 • • 發佈：2021-07-18
✨課程連結
【狂神說Java】JavaScript最新教程通俗易懂_嗶哩嗶哩_bilibili
✨學習筆記
內部物件
Date
var date = new Date(); date.getFullYear() date.getMonth() // 0-11 date.getDate() date.getDay() // 星期幾 date.getHours() date.getMinutes() date.getSeconds() date.getTime() // 時間戳 console.log(new Date(date.getTime())) console.log(date.toLocaleString())
JSON
var user = {
name:"user",
age:"3",
}
var jsonUser = JSON.stringify(user);
console.log(jsonUser)
var stringUser = JSON.parse('{"name":"user","age":"3"}')
console.log(stringUser)
Ajax
- 原生js寫法 xhr非同步請求
- JQuery封裝好的方法 $("#name").ajax("")
- axios請求
原型物件
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <script> var Student = { name:"student", age:"3", run:function () { console.log(this.name + " run...") } } var temp = { name:"temp" } temp.__proto__ = user temp.run() </script> <body> </body> </html>
class繼承
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script> function Student(name){ this.name = name } // 新增方法 Student.prototype.hello = function () { alert("Hello") } // ES6 之後 // 定義一個Student類 class Student{ constructor(name) { this.name = name } hello(){ alert("Hello") } } var student = new Student("test"); console.log(student.name) student.hello() class CollegeStudent extends Student{ constructor(props, grade) { super(props); this.grade = grade } printGrade(){ alert(this.grade) } } </script> </head> <body> </body> </html>
⭐轉載請註明出處
本文作者：雙份濃縮馥芮白
原文連結：https://www.cnblogs.com/Flat-White/p/15026129.html
版權所有，如需轉載請註明出處。