How Do I Write to Files in Node.js?

Writing to Files in Node.js

Writing to files in Node.js is a straightforward task, despite the complexity of the File System API. The most widely used approach involves the following steps:

Importing the File System Module:

Begin by importing the fs module, which provides functions for file handling.

const fs = require('fs');

Opening a File:

To write to a file, you must first open it. You can do this using the fs.writeFile() function, which takes the path to the file and a callback function.

fs.writeFile("/tmp/test", "Hey there!", function(err) {

Writing to the File:

Inside the callback function, you can handle any errors that occur while writing to the file. If there are no errors, you can log a success message.

    if(err) {
        return console.log(err);
    }
    console.log("The file was saved!");
}); 

Alternative Method: Synchronous Writing

Node.js also provides a synchronous method for writing to files using fs.writeFileSync().

fs.writeFileSync('/tmp/test-sync', 'Hey there!');

This method writes to the file immediately, without using a callback function. However, it is important to note that synchronous writes can block the event loop and should be used cautiously.

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