Human's free will relates to Allah's decree and determination, considering Allah's power and knowledge. Qada' and Qadr.

QadaQadr.js

// Define the concept of human free will
const human_free_will = true

// Call the function to simulate a human making a choice and determining the outcome
// Output the result of the simulation
simulate_human_choice('Go to the gym')
  .then(outcome => {
    console.log(`Outcome: ${outcome}`)
  })
  .catch(error => console.log(`ReferenceError: ${error}`));


// Define a function to simulate a human choice
function make_choice(choice) {
  if (human_free_will) {
    // If humans have free will, they can make a choice
    return choice
  } else {
    // If humans do not have free will, the choice is predetermined
    return allah_decree
  }
}

// Define a function to determine the outcome of a choice
async function determine_outcome(choice) {
  // Define the concept of Allah's decree and determination
  const allah_decree = new Promise((resolve, reject) => {
    // Define the concept of Allah's power and knowledge
    const allah_power = true
    const allah_knowledge = true
    if (allah_power && allah_knowledge)
      resolve("Allah knows best");
    else
      reject("Subhanallah, it's impossible");
  });
  let outcome = await allah_decree;
  ;
  return outcome;
}

// Define a function to simulate a human making a choice and determining the outcome
async function simulate_human_choice(choice) {
  let human_choice = make_choice(choice)
  console.log(`Human's Choice: ${human_choice}`)
  let outcome = await determine_outcome(human_choice)
  return outcome
}

Please comment if it is against the sunnah.
جَزَاكَ ٱللَّٰهُ خَيْرًا
الله أعلم