Measure Event Performance

measureEventPerformance.js

function measureEventPerformance(event) {
  const lag = performance.now() - event.timeStamp;
  console.log(`Event took: ${lag} ms`);
}

// Usage
const submitButton = document.querySelector('button[type="submit"]');

submitButton.addEventListener('click', (event) => {
  // Event listener logic here...
  
  measureEventPerformance(event);
});