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

To use the ftruncatesync function from the fs-extra library in Node.js, you need to follow these steps:

1. Install the fs-extra library:

index.tsx
npm install fs-extra
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2. Import the fs-extra library in your Node.js file:

index.tsx
const fse = require('fs-extra');
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3. Call the ftruncatesync function with the file path and the new size of the file (in bytes) as arguments:

index.tsx
const filePath = '/path/to/my/file.txt';
const newSize = 1024; // new size in bytes
fse.ftruncateSync(filePath, newSize);
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This will truncate the file at the specified path to the specified size. If the file was larger than the new size, the extra data will be deleted. If the file was smaller than the new size, the file will be extended and filled with null bytes.

Note that the ftruncateSync function is synchronous, so it will block the Node.js event loop until it completes. If you need to truncate a file asynchronously, you can use the ftruncate function instead, which takes a callback function as an argument.