JavaScript first week study

The understanding of JS: JavaScript is a kind of literal translation scripting language, is a dynamic type, weak type, prototype-based language, built-in support type. Its interpreter, known as the JavaScript engine, is widely used as a scripting language for the client, and is used in HTML (an application under the standard Universal Markup Language) to add dynamic functionality to an HTML Web page. The purpose of JS is to better control the browser.

JS Basics:

About the difference between name, ID, class:

Name: Mainly used for interaction with the background;

Id:js used, the only one;

Class:html and CSS are used, not unique.

About the difference between name, ID, class:

Name: Mainly used for interaction with the background;

Id:js used, the only one;

Class:html and CSS are used, not unique.

About the difference between name, ID, class:

Name: Mainly used for interaction with the background;

Id:js used, the only one;

Class:html and CSS are used, not unique.

Some of the tags on JS

Alert: Pop-up window

Console: Background Printing

Document: Page Print

String with ""

Digital Direct Write

Null with "" Empty

Boolean: Ture or False

JavaScript first week study