Async fs.exists()

example.ts

import { fsExists } from './utils';

if ( ! ( await fsExists( folder ) ) ) {
   // ...
}

utils.ts

import fsa from 'fs/promises';

// Node.js does not provide a promisified version of fs.exists() (and the latter one is deprecated)
export async function fsExists( path: string ): Promise< boolean > {
	return !! ( await fsa.stat( path ).catch( _e => false ) );
}