node code to read json file

Sure! Here is an example of Node.js code to read a JSON file, along with explanations for each step:

const fs = require('fs');

// Step 1: Read the JSON file
fs.readFile('data.json', 'utf8', (err, data) => {
  if (err) {
    console.error(err);
    return;
  }

  // Step 2: Parse the JSON data
  const jsonData = JSON.parse(data);

  // Step 3: Access the contents of the JSON object
  console.log(jsonData);

  // Step 4: Perform further operations with the JSON data
  // ...
});

Step 1: First, we import the built-in fs module, which provides file system-related functionality, including reading and writing files.

Step 2: We use the readFile method from the fs module to read the JSON file named data.json. The second argument 'utf8' specifies the encoding of the file, which is typically used for text files. The third argument is a callback function that is executed when the file has been read. If an error occurs during the reading process, the error is logged to the console.

Step 3: Inside the callback function, we parse the JSON data using JSON.parse(). This function converts the JSON string into a JavaScript object.

Step 4: Finally, we can access and work with the contents of the JSON object as needed. In this example, we simply log the entire object to the console, but you can perform any necessary operations on the data at this point.

I hope this helps! Let me know if you have any further questions.