zoukankan      html  css  js  c++  java
  • Why Study JavaScript?

    JavaScript is one of the 3 languages all web developers must learn:

       1. HTML to define the content of web pages

       2. CSS to specify the layout of web pages

       3. JavaScript to program the behavior of web pages

    JavaScript and Java are completely different languages, both in concept and design.

    JavaScript was invented by Brendan Eich in 1995, and became an ECMA standard in 1997.

    ECMA-262 is the official name. ECMAScript 5 (JavaScript 1.8.5 - July 2010) is the latest standard.

    Older examples may use a type attribute: <script type="text/javascript">.
    The type attribute is not required. JavaScript is the default scripting language in HTML.

    Placing JavaScripts in external files has some advantages:

    • It separates HTML and code.
    • It makes HTML and JavaScript easier to read and maintain
    • Cached JavaScript files can speed up page loads.

    All JavaScript identifiers are case sensitive

    The variables lastName and lastname, are two different variables.



  • 相关阅读:
    LeetCode 773. Sliding Puzzle
    oracle latch工作原理
    Oracle关于锁的几种类型和参数
    Java的反射机制
    JAVA多线程与并发学习总结
    Spring 概念详解
    Spring的AOP
    spring面试题 对DI , AOP概念的理解
    双11的架构
    Java线程的定义
  • 原文地址:https://www.cnblogs.com/vonk/p/4238695.html
Copyright © 2011-2022 走看看