Do I need to install anything to use javascript?

There are two situations where you need to install something to use JavaScript: 1. If you run it in HTML, you don’t need to install it. You only need a document editor (such as Notepad) and a web browser to implement JavaScript code. It is running; 2. If you want to run the JavaScript program directly, you need to download and install the "node.js" environment. At this time, running the JS program does not require the assistance of HTML and can be run directly.

The operating environment of this tutorial: Windows 10 system, JavaScript version 1.8.5, Dell G3 computer.

Do I need to install anything to use javascript?

1. Run in html

This kind of operation only requires one document editor By using the browser, you can run JS code.

These are all included with the operating system, so basically you don’t need to install any software to develop JavaScript.

Because JavaScript is a language that runs in the browser, there is no need to set up an environment, just the browser.

2. Run the JS program directly

You need to download and install the node.js environment, which is similar to python and java. At this time, running the JS program does not require the assistance of html and can be run directly.

For example, node xxx.js in cmd is enough, and environment variables also need to be configured.

Extended knowledge

Node.js is not an independent language, nor is it a JavaScript framework. Node.js is just a framework that allows JavaScript to run outside the browser. platform. It uses event-driven, asynchronous programming, and is designed for network services. It implements functions such as file systems, modules, packages, operating system APIs, network communications, etc. that Core JavaScript does not have or is incomplete.

What can Node do?

• Websites with complex logic

• Large-scale web applications based on social networks

• web Socket website

• TCP\UDP socket application

• Command line tool

• Interactive terminal program

• Local application with graphical user interface

• Unit testing tool

• Client-side Javascript compiler

##Features of Node

The biggest feature of node is the use of asynchronous I\O and event-driven

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