11-23 basic knowledge of Web base--javascript

First lesson about JavaScript

Definition: JavaScript is a scripting language, requires a host file, and its host file is an HTML file.

JavaScript is a lightweight programming language.

JavaScript is a programmatic code that can be inserted into an HTML page.

When JavaScript is inserted into an HTML page, it can be performed by all modern browsers.

The use: In the HTML position has three blocks: 1) inside head; 2) body inside; 3) after

1. Write HTML output

2. Responding to Events

3. Find elements, change content/Style

4. Defining variable groups-equivalent to structs in C # (a collection of variables)

The <script> code can be written in

5. How to invoke external JS

With "File"--new "JavaScript"--"create". Write operations, functions, and so on in the new "JavaScript" by calling them in HTML.

Format: <script src= "path. JS "></script>

Create a new file with the JS suffix on the outside.

Referencing external JS in the host file HTML

11-23 basic knowledge of Web base--javascript