Using Node.js File System Module for Writing a File

To write data to a file in Node.js, developers typically use the native fs (file system) module. This invaluable module is central to managing file operations and interactions within Node.js. It is important to note that the fs module offers two different mechanisms for writing data: asynchronous (non-blocking) and synchronous (blocking). When diving deeper into these methods, the asynchronous approach is especially noteworthy. This method does not block the main thread, ensuring smooth operation even when working with large amounts of data or performing multiple operations simultaneously. As a result, it is predominantly recommended for most applications where responsiveness and parallel processing are critical.
Using Node.js File System Module for Writing a File Execute 
const fs = require('fs');

let dataToWrite = 'This is sample text to write to our file.';

fs.writeFile('output.txt', dataToWrite, 'utf8', (err) => {
    if (err) {
        console.error('Error writing to the file:', err);
        return;
    }
    console.log('File written successfully!');

    fs.readFile('output.txt', 'utf8', (err, data) => {
        if (err) {
            console.error('Error reading the file:', err);
            return;
        }
        console.log('File content:', data);
    });
});