Loading Multiple JSON Files into One and Reading Them in Console JavaScript

Working with multiple JSON files can be a common requirement when managing and processing data in your projects. This guide will walk you through the process of loading multiple JSON files into a single JSON file, and then reading and logging that combined data in your console using JavaScript.

Step 1: Combining JSON Files

To combine multiple JSON files into a single file, you can use Node.js. This guide will demonstrate how to do this using a simple script. Follow these steps:

Create a new JavaScript file:
e.g., combineJson.js Install the node file system module:
If you haven't already, install fs module to handle file I/O operations. Create a list of JSON files:
List the JSON files you want to combine, for example: file1.json, file2.json, file3.json. Combine the JSON files:
Use the fs module to read each file and combine their data. Write the combined data to a new JSON file:
Save the combined data into a new file.

Example Script

Below is an example script to combine multiple JSON files:

const fs  require('fs');
// List of JSON files to combine
const jsonFiles  ['file1.json', 'file2.json', 'file3.json'];
let combinedData  [];
// Read each JSON file and combine the data
for (let file  0; file jsonFiles.length; file  ) {
    const data  (jsonFiles[file], 'utf8');
    combinedData.push((data));
}
// Write the combined data to a new JSON file
fs.writeFileSync('combined.json', (combinedData), 'utf8');
// Log the combined JSON saved to combined.json
console.log('Combined JSON saved to combined.json');

Step 2: Reading Combined JSON in Console

Once you have the combined JSON file, you can read it in the console using the following code:

const fs  require('fs');
// Read the combined JSON file
const combinedData  ('combined.json', 'utf8');
// Log the data to the console
console.log('Combined JSON data:', combinedData);

Step 3: Run the Script

To run these scripts, follow these terminal commands:

node combineJson.js
node readJson.js

Summary

This guide provided a simple and efficient approach to combining multiple JSON files into a single file using Node.js. By reading and merging each file's contents and writing the combined data to a new file, you can streamline your data management and processing tasks. Additionally, you can read and log the combined JSON data directly in your console.

Additional Tips

Using the spread operator is another method to combine JSON objects, but it is more suitable for merging objects into a single object rather than combining arrays of JSON objects. For combining JSON files, using an array and concatenation is often more reliable and less error-prone.

If you have any further questions or need more strategies for managing and manipulating JSON data, feel free to reach out. Happy coding!

Thanks and Regards,