The JavaScript code snippet initiates an asynchronous operation with $.async() and handles the result or error using the .then() and .catch() methods, passing the result to $.sendResult() or the error to $.sendError().

The code starts with $.async() to initiate an asynchronous operation and continues with a promise resolution and error handling using .then() and .catch(). The result or error is then passed to specific functions within a framework or library, indicated by the $.$ namespace.

Cell 2

$.async()
runHighFiver()
    .then(r => $.sendResult(r))
    .catch(e => $.sendError(e))

/**
 * Run high fiver and send result or error.
 * @async
 * @returns {Promise}
 */
async function runHighFiverAndSendResult() {
  try {
    // Run high fiver
    const highFiverResult = await runHighFiver();
    
    // Send result
    await $.sendResult(highFiverResult);
  } catch (error) {
    // Send error if any
    $.sendError(error);
  }
}

// Refactored version
$.async()
 .then(() => runHighFiverAndSendResult());

// Alternatively, you can also use a more modern and concise syntax
$.async()
 .then(runHighFiverAndSendResult)
 .catch($.sendError);

// Define the runHighFiver function to avoid undefined
function runHighFiver() {
  // This function should contain the logic to run high fiver
  // For demonstration purposes, we'll return a promise that resolves after 1 second
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve(true); // Replace with actual high fiver logic
    }, 1000);
  });
}

Code Breakdown

Overview

This is a JavaScript code snippet that appears to be part of a larger framework or library.

Code Structure

• The code starts with $.async(), which likely initiates an asynchronous operation.
• The runHighFiver() function is called next, which returns a promise.
• The promise is then handled using the .then() and .catch() methods:
  • .then(r => $.sendResult(r)): If the promise resolves successfully, the result (r) is passed to the $.sendResult() function.
  • .catch(e => $.sendError(e)): If the promise rejects, the error (e) is passed to the $.sendError() function.

Assumptions

• $.async(), runHighFiver(), $.sendResult(), and $.sendError() are functions or methods within the framework or library being used.
• The $.$ syntax suggests a namespace or alias for an object or library.