How to Async Get File Extension in JavaScript - Code Snippet

// Task: Async Get File Extension
// Language: JavaScript

function asyncGetFileExtension() {
    // Implementation for Async Get File Extension
    const result = ...; // Initialize variable
    // TODO: Implement core logic here
    // Step 1: Prepare data
    // Step 2: Process Async Get File Extension
    console.log("Done");
}