How do you import a module in Node.js?include 'module';import module from 'module';require('module');load 'module';

In Node.js, you can import a module using the require function. Here is a step-by-step guide:

1. First, ensure that the module you want to import is installed. If it's a built-in module (like fs or http), you can skip this step. If it's a third-party module (like express or lodash), you can install it using npm (Node Package Manager) with the command npm install module-name.

2. Once the module is installed, you can import it in your JavaScript file. At the top of your file, add the following line of code:

var moduleName = require('module-name');

Replace module-name with the name of the module you want to import. The require function will return an object, function, or any other JavaScript type, depending on what the module exports. This will be assigned to the variable moduleName, and you can use this variable to access the module's exports.

3. Now you can use the module in your code. For example, if you imported the fs module (which provides file system functions), you could use it like this:

var fs = require('fs');

fs.readFile('example.txt', 'utf8', function(err, data) {
  if (err) throw err;
  console.log(data);
});

This code reads the contents of example.txt and logs it to the console. If there's an error (like if the file doesn't exist), it throws the error.