Basic JavaScript tutorial-entry required

The following is a basic tutorial on JavaScript. I think it is quite good. Now I will share it with you and give you a reference. Let's take a look at JavaScript. He is a descriptive language. In fact, he is not difficult to learn. As long as he studies it with heart, he will certainly learn it well. I believe that when you read this article, I have also learned HTML. using JavaScript is to have better interaction with webpages. The following describes the theme.

I. JavaScript

1. What is JavaScript?

JavaScript is a descriptive language, an Object-based and Event-Driven scripting language with security.

2. Features of JavaScript

JavaScript is mainly used to add interactive behaviors to HTML pages.

JavaScript is a scripting language. Its syntax is similar to Java.

JavaScript is generally used to write client scripts.

JavaScript is an explanatory language.

3. Composition of JavaScript

ECMScript standard (standard for all attributes, methods, and objects)

BOM Browser Object Model: interaction with HTML

DOM Document Object Model: access and manipulate HTML documents

4. Basic JavaScript Structure