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

To stop watching a file in Node.js using fs-extra and its unwatchFile function, you first need to start watching the file using watchFile.

Here's an example of how to use unwatchFile:

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

// specify the file and the options for the watcher
const fileToWatch = './path/to/file.txt';
const watcherOptions = { persistent: true, interval: 5000 };

// start watching the file
fs.watchFile(fileToWatch, watcherOptions, (curr, prev) => {
  console.log(`${fileToWatch} file changed`);
});

// stop watching the file after 30 seconds
setTimeout(() => {
  fs.unwatchFile(fileToWatch);
  console.log(`Stopped watching ${fileToWatch}`);
}, 30000);
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In this example, we first specify the file we want to watch and some options for the watcher. We then call fs.watchFile with three arguments: the file to watch, the options, and a callback function to execute when the file changes.

We then use setTimeout to stop watching the file after 30 seconds by calling fs.unwatchFile with the same file path we used to start watching the file.

Note that there are some caveats to using fs.watchFile and fs.unwatchFile. For example, these functions are not as efficient or reliable as other file-watching libraries in Node.js like chokidar. Additionally, watchFile has been known to cause performance issues on certain platforms, so it should be used with caution.