javascript从入门到精通 step by step目录 (1)

转JavaScript教程从入门到精通1一、JavaScript语言概况Internet时代，造就了我们新的工作和生活方式，其互联性、开放性和共享信息的模式，打破了传统信息传播方式的重重壁垒，为我们带来了新的机遇。

随着计算机和信息时代的到来，人类社会前进的脚步在逐渐加快，每一天都有新的事情发生，每一天都在创造着奇迹。

随着Internet技术的突飞猛进，各行各业都在加入Internet的行业中来。

无论从管理方面，还是从商业角度来看，Internet都可以带来无限生机。

通过Internet，可以实现地区、集体乃至个人的连接，从而达到一种"统一的和谐"。

那么怎样把自己的或公司的信息资源加入到WWW服务器，是广大用户日益关心的问题。

采用超链技术(超文本和超媒体技术)是实现这个目标最简单的、最快速的手段和途径。

具体实现这种手段的支持环境，那就是HTML超文本标识语言。

通过它们可制作所需的Web网页。

通过超文本(Hyper Text)和超媒体(Hyper Media)技术结合超链接(Hyper link)的链接功能将各种信息组织成网络结构(web)，构成网络文档(Document)，实现Internet上的"漫游"。

通过HTML符号的描述就可以实现文字、表格、声音、图像、动画等多媒体信息的检索。

然而采用这种超链技术存在有一定的缺陷，那就是它只能提供一种静态的信息资源，缺少动态的客户端与服务器端的交互。

虽然可通过CGI(Common Gateway Interface)通用网关接口实现一定的交互，但由于该方法编程较为复杂，因而在一段时间防碍了Internet技术的发展。

而JavaScript的出现，无凝为Internet网上用户带来了一线生机。

可以这样说,JavaScript的出现是时代的需求,是当今的信息时代造就了JavaScript。

JavaScript的出现，它可以使得信息和用户之间不仅只是一种显示和浏览的关系，而是实现了一种实时的、动态的、可交式的表达能力。

JavaScript学习⼿册（⼀）JavaScript 学习⼿册1. JavaScript 基础⼊门1.1. JavaScript 注释// 单⾏注释/* 多⾏注释 *//*** 更为美观的多⾏注释*/1.2. 字⾯量字⾯量是⼀种直接在程序中使⽤的数据值。

⽐如：121.2"hello world"'Hi'truefalsenull1.3. 标识符和保留字标识符常⽤于在JavaScript代码中命名常量、变量、属性、函数以及类，JavaScript必须以字母、下划线(_)、或美元符号($)开头。

后续字符可以是字母、数字、下划线或美元符号。

例如：imy_variable_name_dump$str1.4. 保留字与其他语⾔⼀样，JavaScript为语⾔⾃⾝使⽤⽽保留了⼀些标识符，这些标识符称为保留字，其不能作为常量、变量、函数或类的名字，但是可以作为对象的属性名。

这些保留字有：as const export get null target voidasync continue extends if of this whileawait debugger false import return throw withbreak default finally in set true yieldcase delete for instanceof static try argumentscatch do from let super typeof evalclass else function new switch var1.5. UnicodeJavaScript程序是使⽤Unicode字符集编写的，因此在字符串和注释中可以使⽤任意Unicode字符。

考虑可移植性，建议使⽤标识符的命名只使⽤ASCII字母和数字。

1.5.1 Unicode 转义序列某些计算机或硬件⽆法全部正确的显⽰Unicode全部字符，因此JavaScript定义了转义序列，从⽽可以仅使⽤ASCII字符来表⽰Unicode字符。

语言入门 第 1 章 JavaScript 语言入门 1 为什么学习 JavaScript提要：Javascript 是学习脚本语言的首选。

她兼容性好，绝大多数浏览器均支持 Javascript，而且她功能强大，实现简单方便，入门简单，即使是程序设计新手也可以非常 快速容易地使用 JavaScript 进行简单的编程。

Javascript 是由 Netscape 公司创造的一种脚本语言。

为便于推广，被定为 javascript，但 是 javascript 与 java 是两门不相干的语言， 作用也不一样。

作为一门独立的编程语言， javascript 可以做很多的事情，但它最主流的应用还是在 Web 上——创建动态网页(即网页特效)。

Javascript 在网络上应用广泛， 几乎所有的动态网页里都能找到它的身影。

目前流行的 AJAX 也是依赖于 Javascript 而存在的。

Javascript 与 Jscript 也不是一门相同的语言， Jscript 和 vbscript 是微软开发的两种脚本语 言，微软，Netscape 公司以及其他语言开发商为减少 web 开发者的兼容麻烦，所以成立 ECMA ， 该组 织 专 门制定 脚 本 语 言的 标 准 和规范 。

ECMA 制 定 的标 准脚 本 语 言 叫做 ECMAScript，Javascript 符合 ECMA 的标准，其实 Javascript 也可以叫做 ECMAScript. Jscript 也 ECMA 的标准， 但用户较少。

vbscript 仅局限在微软的用户， Netscape 不支持。

概括地说，JavaScript 就是一种基于对象和事件驱动，并具有安全性能的脚本语言，脚 本语言简单理解就是在客户端的浏览器就可以互动响应处理程序的语言， 而不需要服务器的 处理和响应，当然 JavaScript 也可以做到与服务器的交互响应，而且功能也很强大。

一步步教你掌握JavaScript编程语言Chapter 1: Introduction to JavaScriptJavaScript is a widely-used programming language that provides interactivity to websites. It was created by Brendan Eich in 1995 and has since become an essential skill for web developers. In this chapter, we will discuss the basics of JavaScript and its role in web development.1.1 What is JavaScript?JavaScript is a high-level, interpreted programming language that is primarily used for web development. It is often embedded in HTML files and executed by web browsers. JavaScript allows developers to create dynamic and interactive webpages, enhancing user experience.1.2 Why learn JavaScript?JavaScript is an essential skill for web developers due to its versatility and wide range of applications. It enables developers to create interactive elements, validate forms, manipulate data, and even build complete web applications. Learning JavaScript opens up opportunities for career growth and enhances job prospects in the tech industry.Chapter 2: Getting Started with JavaScriptIn this chapter, we will cover the fundamentals of JavaScript, including variables, data types, and operators.2.1 Variables and Data TypesVariables are containers for storing data in a program. In JavaScript, you can declare variables using the 'var', 'let', or 'const' keywords. JavaScript supports various data types, including numbers, strings, booleans, arrays, and objects.2.2 OperatorsJavaScript provides operators for performing mathematical calculations, comparison, and logical operations. These include arithmetic operators (+, -, *, /), assignment operators (=, +=, -=), comparison operators (==, ===, !=, !==), and logical operators (&&,||, !).Chapter 3: Control Flow and FunctionsControl flow and functions are essential concepts in JavaScript programming. This chapter will discuss conditional statements, loops, and functions.3.1 Conditional StatementsConditional statements help control the flow of a program based on certain conditions. JavaScript provides if...else, switch, and ternary operators for implementing conditional logic. These statements allow developers to execute different blocks of code based on specific conditions.3.2 LoopsLoops are used to repeatedly execute a block of code. JavaScript supports different types of loops, including 'for', 'while', and 'do...while'. These loops facilitate iteration over arrays, objects, and other data structures, allowing developers to manipulate data more efficiently.3.3 FunctionsFunctions are reusable blocks of code that perform a specific task. JavaScript functions can have parameters and return values, making them versatile and widely used. They enable developers to break down complex tasks into smaller, more manageable chunks of code.Chapter 4: Working with JavaScript ObjectsJavaScript objects are key-value pairs that store data and functions. This chapter will explore object creation, manipulation, and object-oriented programming concepts in JavaScript.4.1 Object CreationObjects in JavaScript can be created using object literal notation or by using constructor functions. Object properties and methods can be accessed and modified using dot notation or bracket notation.4.2 Object ManipulationJavaScript provides methods for adding and removing properties from objects, looping over object properties, and copying objects. Object manipulation is crucial for working with complex data structures in JavaScript.4.3 Object-Oriented ProgrammingObject-oriented programming is a programming paradigm that revolves around using objects to structure code. JavaScript supports object-oriented programming concepts such as inheritance, encapsulation, and polymorphism.Chapter 5: DOM Manipulation and Event HandlingThe Document Object Model (DOM) is a programming interface for web documents. In this chapter, we will explore how to manipulate the DOM and handle events using JavaScript.5.1 DOM ManipulationJavaScript provides methods for accessing, modifying, and creating elements in the HTML document. Developers can use these methods to dynamically update webpages based on user input or other conditions.5.2 Event HandlingEvents are user actions or system-generated notifications that trigger code execution. JavaScript enables developers to handle events such as button clicks, mouse movements, and form submissions. By attaching event listeners to HTML elements, developers can execute specific code when these events occur.Conclusion:JavaScript is a powerful programming language that adds interactivity and dynamic functionality to websites. By mastering JavaScript, developers can create engaging user experiences, manipulate data, and build complex web applications. This guide has provided an overview of JavaScript fundamentals, control flow, objects, DOM manipulation, and event handling. With practice and further exploration, you can become proficient in JavaScript and unlock a world of possibilities in web development.。

JavaScrip教学大纲第一章掌握JavaScrip语言的基础。

(2学时)(1) 教学内容①脚本语言的概念②JavaScrip语言基本语法(2) 教学基本要求了解：脚本的概念掌握：JavaScrip语言基本语法第二章 JavaScrip与HTML语言(5学时)(1) 教学内容①HTML语言的基本语法②HTML语言与JavaScrip的结合(2) 教学基本要求掌握：HTML语言和JavaScrip如何嵌入到HTML语言中。

第三章 JavaScrip的基本语法(5学时)(1)教学内容①JavaScrip的基本数据结构②JavaScrip的运算符③各种表达式及控制选择结构(2)教学基本要求了解：JavaScrip的各种数据类型掌握：各种运算符，表达式的运算。

使用控制选择结构编写简单的程序。

第四章窗口对象(5学时).(1)教学内容①引用对象的属性、方法②三种基本对话框：警告框、提示框、确认框③使用open(),close()方法(2)教学基本要求了解：对象的的概念掌握：三种基本对话框第五章 document对象(5学时)(1)教学内容①document对象的方法和属性②write方法(2)教学基本要求了解：document对象的概念理解：数组概念.掌握：document对象的方法和属性第六章文本对象(4学时)(1)教学内容①文本对象的属性和方法(2)教学基本要求了解：文本对象的概念掌握：文本对象的属性和方法第七章按钮对象(4学时)(1)教学内容①复选框对象②单选按纽对象③引用单选按纽组对象中的文本、调用函数(2)教学基本要求了解：函数的概念掌握：按纽对象与事件的结合使用第八章选择和隐藏对象(2学时)(1)教学内容①选择和隐藏对象的定义②选择和隐藏对象的引用(2)教学基本要求了解：选择和隐藏对象的概念掌握：选择和隐藏对象的引用第九章 location 对象(2学时)(1)教学内容①location 对象②hash属性(2)教学基本要求了解：location 对象的概念掌握：hash属性实现页内链接第十章 history对象(2学时)(1)教学内容①history对象②length属性③back()、 forward()、 go()三种主要方法(2)教学基本要求了解：history对象的概念掌握：history对象的length属性第十一章字符串对象(2学时)(1)教学内容①字符串对象②格式方法③操作方法(2)教学基本要求了解：字符串的概念掌握：两类方法的使用第十二章日期对象(2学时)(1)教学内容①日期对象弘博软件教育②使用方法(2)教学基本要求掌握：日期对象的使用方法第十三章数学对象(2学时)(1)教学内容①数学对象的定义②方法和属性(2)教学基本要求了解：数学对象的概念掌握：数学对象的方法和属性第十四章数组对象(4学时)(1)教学内容①数组的概念②两种数组的定义③两种数组的使用(2)教学基本要求了解：数组的概念掌握：两种数组的定义及使用第十五章样式单实例(2学时)(1)教学内容①样式单的定义②样式单的使用(2)教学基本要求掌握：样式单的定义和使用。

JavaScript编程基础入门教程Chapter 1: Introduction to JavaScriptJavaScript is a widely used programming language that is mainly used for web development. It is a high-level, interpreted language that can be embedded within HTML to add interactivity and enhance the user experience. JavaScript is supported by almost all modern web browsers, making it a popular choice for creating dynamic and interactive web applications.1.1 History of JavaScriptJavaScript was introduced in 1995 by Brendan Eich, a programmer at Netscape Communications. Originally named "LiveScript," it was later renamed to JavaScript to leverage the popularity of Java at that time. Since then, JavaScript has evolved significantly and has become an essential part of web development.1.2 Benefits of Using JavaScriptJavaScript offers numerous advantages when it comes to web development. Some of the key benefits include:- Enhanced User Experience: With JavaScript, developers can create interactive elements such as dropdown menus, image sliders, and form validation that improve the overall user experience.- Client-Side Execution: JavaScript runs directly on the user's web browser, reducing the need for server-side processing and enhancing performance.- Wide Support: JavaScript is supported by all major web browsers, making it accessible on a wide range of devices.Chapter 2: Basic Syntax and Data Types2.1 SyntaxJavaScript follows a syntax similar to other programming languages such as Java and C++. It uses semicolons to separate statements and curly braces to define code blocks.Example:```let message = "Hello, JavaScript!";console.log(message);```2.2 Data TypesJavaScript supports several data types, including:- String: Used for representing text. Example: "Hello, World!"- Number: Used for representing numeric values. Example: 42- Boolean: Used for representing true or false values.- Array: Used for storing multiple values in a single variable.- Object: Used for storing key-value pairs.Chapter 3: Variables and Operators3.1 VariablesIn JavaScript, variables are used for storing and manipulating data. They can be declared using the `let` or `var` keyword.Example:```let name = "John";var age = 25;```3.2 OperatorsJavaScript supports a wide range of operators for performing mathematical, logical, and comparison operations. Some common operators include:- Arithmetic Operators: +, -, *, /, %- Comparison Operators: ==, !=, >, <, >=, <=- Logical Operators: && (AND), || (OR), ! (NOT)Chapter 4: Control Flow and Loops4.1 Conditional StatementsJavaScript provides conditional statements such as `if`, `else if`, and `else` to control the flow of execution based on certain conditions.Example:```let num = 10;if (num > 0) {console.log("Positive");} else if (num < 0) {console.log("Negative");} else {console.log("Zero");}```4.2 LoopsLoops are used for repeated execution of a block of code. JavaScript supports several types of loops, including `for`, `while`, and `do-while`.Example:for (let i = 0; i < 5; i++) {console.log(i);}let i = 0;while (i < 5) {console.log(i);i++;}```Chapter 5: Functions and Objects5.1 FunctionsFunctions are reusable blocks of code that perform a specific task. They can be defined using the `function` keyword.Example:```function greet(name) {console.log("Hello, " + name + "!");greet("John");```5.2 ObjectsObjects are used for storing and organizing related data and functionality. They consist of properties (variables) and methods (functions).Example:```let person = {name: "John",age: 25,greet: function() {console.log("Hello, " + + "!");}};console.log();person.greet();```Conclusion:This beginner's guide has provided an overview of JavaScript's fundamentals, including its syntax, data types, variables, operators, control flow, and functions and objects. Understanding these core concepts is crucial for further exploring the vast possibilities of JavaScript programming. With practice and hands-on experience, you will be able to create dynamic and interactive web applications using JavaScript.。