Learn about NodeJs FS (File System) Module
Hello developers,
In this demonstration, I will discuss NodeJs FS Module. FS means File System Module. NodeJs includes the fs module to access the physical file system. The fs module is responsible for all the asynchronous or synchronous file i/O operations.
Synchronous ⇒ Wait to finish, After finish, you can move
Asynchronous ⇒ No need to wait, It will run in the background.
Necessary methods for Node.Js fs module essential operations Asynchronous:
| Method | Description |
|---|---|
| fs.readFile(fileName, [options], callback) | Reads existing file |
| fs.writeFile(fileName, data[options], callback) | Writes to the file. If the file exists then overwrite the content otherwise creates a new file |
| fs.rename(oldPath, newPath, Callback) | Renames an existing file |
| fs.exists(path, callback) | Determines whether the specified file exists or not |
| fs.unlink(path, callback) | File delete |
| fs.append(path, data[options], callback) | Appends new contents to the existing file |
| fs.open(path, flags[mode], callback) | Opens file for reading or writing |
| fs.mkdir(path, [mode], callback) | Creates a new directory |
| fs.rmdir(path, callback) | Renames an existing directory |
| fs.readdir(path, callback) | Reads the content of the specified directory |
Necessary methods for Node.Js fs module essential operations Synchronous:
| Method | Description |
|---|---|
| fs.readFileSync(fileName, [options]) | Reads existing file |
| fs.writeFileSync(fileName, data[options]) | Writes to the file. If the file exists then overwrite the content otherwise creates a new file |
| fs.renameSync(oldPath, newPath) | Renames an existing file |
| fs.existsSync(path) | Determines whether the specified file exists or not |
| fs.unlinkSync(path) | File delete |
| fs.appendSync(path, data[options]) | Appends new contents to the existing file |
| fs.openSync(path, flags[mode]) | Opens file for reading or writing |
| fs.mkdirSync(path, [mode]) | Creates a new directory |
| fs.rmdirSync(path) | Renames an existing directory |
| fs.readdirSync(path) | Reads the content of the specified directory |
Hope this might help in the journey of development.
Read More: Working with URL module in NodeJs
K. M. Shawkat Zamil
Senior Software Engineer
I am a Senior Software Engineer in a reputed company in Bangladesh. I am a big fan of Laravel, PHP Programming, MSSQL Server, MySql, JavaScript, and lots more. I love to help people who are especially eager to learn. I believe in patience and motivation.