Module Summary模块总结

In this module, you learned that:
在本模块中，您学习了以下内容：

• JavaScript is a scripting language that enables developers to add dynamic content to web pages.
  JavaScript 是一种脚本语言，它使开发者能够向网页添加动态内容。
• JavaScript variables are declared using the 'let' or 'const' keywords and take their type from the value assigned.
  JavaScript 变量使用 'let' 或 'const' 关键字声明，并从分配的值中获取其类型。
• Program execution is controlled by statements like If…Then…Else, Switch, For loops, and While loops.
  程序执行由如 If…Then…Else、Switch、For 循环和 While 循环等语句控制。
• JavaScript uses blocks of code, called functions, that can be called from anywhere in the script.
  JavaScript 使用称为函数的代码块，这些函数可以在脚本中的任何位置被调用。
• New methods and properties can be added to an object by modifying the prototype for that object.
  通过修改该对象的原型，可以向对象添加新的方法和属性。
• Prototypes allow you to define properties and methods for all instances of a specific object.
  原型允许您为特定对象的全部实例定义属性和方法。
• Client-side scripts are programs that accompany HTML documents and are used by developers to incorporate more interactive elements.
  客户端脚本是与 HTML 文档伴随的程序，开发者使用它们来融入更多交互元素。
• The script tag can incorporate a script within an HTML document or call a script from an external file.
  脚本标签可以在 HTML 文档中嵌入脚本或从外部文件调用脚本。
• The Document Object Model (DOM) is the programming interface between HTML or XHTML and JavaScript.
  文档对象模型（DOM）是 HTML 或 XHTML 与 JavaScript 之间的编程接口。
• Developers can access HTML DOM elements from JavaScript scripts using the correct DOM notation.
  开发者可以使用正确的 DOM 标记从 JavaScript 脚本中访问 HTML DOM 元素。
• APIs are often used to access HTML DOM elements in web pages.
  APIs 通常用于访问网页中的 HTML DOM 元素。