How can I use the Performance API in JavaScript?

How can I use the Performance API in JavaScript?

The Performance API provides methods to measure the performance of your web applications. You can use it to gather metrics like page load times.

Can you show me an example of how to measure page load time?

Sure! You can use performance.timing to get the timing data. For example:

const loadTime = performance.timing.loadEventEnd - performance.timing.navigationStart;
console.log(`Page load time: ${loadTime} ms`);

What other metrics can I gather using the Performance API?

You can gather metrics like resource loading times, first paint, first contentful paint, and more using the Performance API.

Is there a way to visualize this performance data?

Yes, you can use libraries like Chart.js or D3.js to visualize the performance data you collect from the Performance API.