Does javascript need to build an environment?

If you are running JavaScript code in HTML, you do not need to set up an environment; because JavaScript is a language that runs in the browser, you do not need to set up an environment, you only need a browser to run it. If you run the JS program directly, you need to download and install the node.js environment.

The operating environment of this tutorial: Windows 7 system, ECMAScript version 5, Dell G3 computer.

JavaScript running environment configuration

1. Run in html

This kind of operation All you need is a document editor browser to run JS code.

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.

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