how to use the filereadstream function from fs-extra in javascript

To use the fs-extra module's FileReadStream function in Node.js, you can follow these steps:

1. Install fs-extra module using npm:

index.tsx
npm install fs-extra
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2. Import fs-extra module in your JavaScript file:

index.tsx
const fs = require('fs-extra');
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3. Create a readable stream using FileReadStream method:

index.tsx
const filePath = '/path/to/file.txt';
const readStream = fs.createReadStream(filePath);
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Here, createReadStream() method takes one argument i.e., the file path which we want to read. This method will return readable stream which can be used to read the data from the file.

4. Handle stream events:

index.tsx
readStream.on('open', () => {
   console.log('File opened!');
});

readStream.on('data', (chunk) => {
   console.log(`Received ${chunk.length} bytes of data.`);
});

readStream.on('end', () => {
   console.log('Reached end of file!');
});

readStream.on('error', (err) => {
   console.error(`Error occurred: ${err}`);
});
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Here, we are handling the events emitted by the readStream object. open event is emitted when a file is opened. data event is emitted when data is being read from the file. end event is emitted when the data reading is completed. error event is emitted when any error occurs while reading the file.

These are the basic steps to use FileReadStream function from fs-extra module in Node.js.