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Mastering File System Management in React Native

Getting Started

To begin, initialize a new React Native project using react-native-cli. Then, install the react-native-fs module:

npm install react-native-fs

Basic Usage

The react-native-fs library provides a set of constants that inform you about the list of file paths configured on the user’s device. These include:

• MainBundleDirectory: The app’s data folder
• DownloadDirectoryPath: The user’s Downloads directory
• ExternalStorageDirectory: The device’s external storage

Here’s an example of how to use these constants:

import { MainBundleDirectory, DownloadDirectoryPath, ExternalStorageDirectory } from 'react-native-fs';

const downloadsFolder = DownloadDirectoryPath;
const documentsFolder = MainBundleDirectory;
const externalFolder = ExternalStorageDirectory;

console.log(downloadsFolder, documentsFolder, externalFolder);

Reading Directories

To get files and folder content, use the readDir method:

import { readDir } from 'react-native-fs';

const getFileContent = async (path) => {
  const response = await readDir(path);
  console.log(response);
};

getFileContent(MainBundleDirectory);

Advanced Usage

Creating Folders

To create a new folder, use the mkdir method:

import { mkdir } from 'react-native-fs';

const makeDirectory = async (folderPath) => {
  await mkdir(folderPath);
};

makeDirectory(`${MainBundleDirectory}/newFolder`);

Creating Files

To write content to a file, use the writeFile method:

import { writeFile } from 'react-native-fs';

const makeFile = async (filePath, content) => {
  await writeFile(filePath, content);
};

makeFile(`${MainBundleDirectory}/newFile.txt`, 'Hello, World!');

Reading Files

To read data from a file, use the readFile method:

import { readFile } from 'react-native-fs';

const readFileContent = async (filePath) => {
  const response = await readFile(filePath);
  console.log(response);
};

readFileContent(`${MainBundleDirectory}/newFile.txt`);

File Deletion

To remove a file or folder, use the unlink method:

import { unlink } from 'react-native-fs';

const deleteFile = async (filePath) => {
  await unlink(filePath);
};

deleteFile(`${MainBundleDirectory}/newFile.txt`);