how to get page load time in javascript

How to get page load time in JavaScriptAs web developers, analyzing the page load time of our website is crucial to ensuring a great user experience. Measuring the page load time helps us identify areas where we can optimize and improve the overall performance of our website. In this article, we’ll explore different ways to get the page load time in JavaScript.Method 1: NavigationTiming APIThe NavigationTiming API is a web API that provides time-related performance metrics for web pages. It gives us different metrics such as the time it takes to load the page, the time it takes to render the page, the time it takes to receive the first byte, and more. We can use this API to get the page load time in JavaScript by creating a performance object and using its timing attribute.Method 2: Performance.now()The performance.now() method provides a high-resolution timestamp measured in milliseconds. We can use this method to measure the time it takes for a section of our code to execute. We can use this method to measure the time it takes for our website to load by measuring the time at which the DOMContentLoaded and the load events occur.Method 3: Window.onloadThe window.onload event fires when the webpage is fully loaded. We can use this event to get the page load time in JavaScript by measuring the time between the DOMContentLoaded event and the window.onload event. This method is easy to implement but may not be the most accurate as it doesn't account for images and other resources that can continue loading after the window.onload event fires.Method 4: Third-party toolsThere are several third-party tools that we can use to measure the page load time of our website. These tools offer more comprehensive reports on different performance metrics such as page size, number of requests, and more. Some popular tools include Google PageSpeed Insights, GTmetrix, and Pingdom.In conclusion, measuring the page load time of our website is crucial for providing a great user experience. Using the NavigationTiming API, performance.now(), window.onload, or third-party tools, we can accurately measure the page load time in JavaScript. By analyzing the page load time, we can identify areas of our website that need optimization and improve the overall performance of our website.