how to use appendfile from fs-extra library in javascript

To use the appendFile() method from the fs-extra library in JavaScript, follow these steps:

1. Install fs-extra library using npm by running the following command in your terminal:

npm install fs-extra
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2. Import the fs-extra library into your JavaScript file:

index.tsx
const fs = require('fs-extra');
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3. Use the appendFile() method to add data to a file:

index.tsx
fs.appendFile('/path/to/file', 'data to append', function (err) {
  if (err) throw err;
  console.log('Data was appended to file!');
});
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The appendFile() method takes three arguments:

• path: the path of the file to which you want to append data
• data: the data you want to append to the file
• callback: a function that is called when the data is successfully appended to the file, or an error occurs. If an error occurs, the error is passed as the first argument to the callback function.

Note that the appendFile() method will create a new file if the specified file doesn't exist.

Here's an example that demonstrates how to use the appendFile() method to add data to a file:

index.tsx
const fs = require('fs-extra');

fs.appendFile('myFile.txt', 'Hello, World!', function (err) {
  if (err) throw err;
  console.log('Data was appended to file!');
});
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