Detailed introduction to writing methods and comments in JavaScript

JavaScript is the script language that runs on the browser side. JavaScript mainly solves the problem of Issues with front-end interaction with users, includingUsing interaction to interact with data. JavaScript is interpreted and executed by the browser. The front-end scripting language also includes JScript (unique to Microsoft and IE), ActionScript( Adobe company, plug-in required), etc.

Three blocks of front-end

1. HTML: page structure 2. CSS: page performance: element size, color, position, hiding or showing, parts

AnimationEffect 3. JavaScript: PageBehavior: Some animation effects, interaction between the page and the user, page functions

Three ways to write JavaScript: embedded - external link - inline

Inline:

*

Write directly inside the tag"

onclick="alert('helloworld')""Embedded (embedded)

*

Writing method" <script><span style="font-family:Consolas; color:red; background:#F7F7F7"><strong> alert('hello world')</script> "* ##Note:

scriptCan be anywhere in html

External link style

1.

Create

js File,Write jscode inside the file2. Pass " ##>" 3. **Note:** You cannot write js code in the file tag that loads js;If you need to add "<script></script>"

Comments of js

1. ## are divided into single-line comments and multi-line comments

2. Single-line comments//

3. Multi-line comments/ Content to comment /

The above is the detailed content of Detailed introduction to writing methods and comments in JavaScript. For more information, please follow other related articles on the PHP Chinese website!