Implementing Asynchronous Functions in JavaScript

Task:

To create an example script that implements asynchronous functions in JavaScript.

Solution:

// Function to simulate an asynchronous operation
function simulateAsyncOperation(data) {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      // Simulating success after 1 second
      resolve(`Operation completed successfully with data: ${data}`);
      
      // Simulating an error after 1 second
      // reject(`Operation failed with data: ${data}`);
    }, 1000);
  });
}

// Example usage of the asynchronous function
async function exampleAsyncFunction() {
  try {
    console.log('Start');

    // Await for the asynchronous operation to complete
    const result = await simulateAsyncOperation('test data');

    console.log(result);
  } catch (error) {
    console.error(error);
  }
}

exampleAsyncFunction();

Example Usage:

exampleAsyncFunction();

This example script demonstrates how to implement an asynchronous function in JavaScript using the async/await syntax. It includes a function simulateAsyncOperation that simulates an asynchronous operation using a Promise that resolves after a delay of 1 second. The exampleAsyncFunction is an example usage of the async/await pattern, which logs the start of the operation, waits for the asynchronous operation to complete, and then logs the result. If an error occurs, it is caught and logged.

Unit Testing:

// Add unit tests here