How to run js files in nodejs

Steps to run JS files in Node.js: Create a .js file. Write JavaScript code in a file. Run the file (node ​​script.js) using the node command. Check the results in the command line window.

How to run JS files in Node.js

The process of running JS files in Node.js is very Simple. Here are the steps on how to do this:

1. Create a JS file

Use a text editor to create a new JS file and use the .js extension Name it. For example, you can use a file named script.js.

2. Write the code in the JS file

Write the required JavaScript code in the script.js file. There you can define variables, functions, and other JavaScript syntax elements.

3. Run the JS file in the command line

Open a command line or terminal window and navigate to the directory containing the script.js file. Run the JS file using the following command:

<code>node script.js</code>

4. View the results

Node.js will execute the script.js file and display any output or error messages. You can view the results in the command line window.

Example

The following is sample code to run a JS file named script.js:

<code class="javascript">// script.js
console.log("Hello World!");</code>

When running this file from the command line, You will see the following output:

<code>Hello World!</code>

Other methods

In addition to using the command line, you can also use the following methods to run JS files in Node.js:

• Using Node.js REPL: You can run JS code directly using Node.js's interactive REPL (read-evaluate-print loop). To access the REPL, type node at the command line.
• Use the Require function: You can use the require() function to dynamically load and run JS files. This is useful in modular applications.

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