Join Amal, Nick, Rick, and Annie for a deep dive into Core Web Vitals, discussing the latest metric INP. They highlight the importance of web performance for user experience, focusing on interaction and optimizing web performance metrics like LCP. Discover how faster websites improve conversions and user engagement.
Core Web Vitals ensure good user experiences by measuring loading performance, interaction responsiveness, and layout stability.
Interaction to Next Paint (INP) sets thresholds for good, needs improvement, and poor user experiences based on user input responsiveness.
INP pitfalls include slow event handling, delayed paint due to heavy DOM manipulation, and blocked user interactions from main thread congestion.
Largest Contentful Paint (LCP) determines render time of critical visible elements, like hero images, to signify page completion for user interaction.
Deep dives
Understanding Core Web Vitals
Core Web Vitals are health metrics for web pages focusing on loading performance, interaction responsiveness, and layout stability. These metrics, such as Largest Contentful Paint (LCP), aim to ensure good user experiences by measuring critical elements like the largest visible content when a page loads.
Interaction to Next Paint (INP)
Interaction to Next Paint (INP) measures how quickly a page responds to user input. It captures user interactions and calculates the time taken for the next screen update. INP sets thresholds for good (<200ms), needs improvement (200-500ms), and poor (>500ms) user experiences.
Common INP Pitfalls
Common INP pitfalls include slow event handling, delayed paint caused by heavy DOM manipulation or excessive JavaScript, and scenarios where user interactions are blocked due to main thread congestion. Optimizing JavaScript execution and prioritizing critical tasks can help address these pitfalls.
Largest Contentful Paint (LCP)
Largest Contentful Paint (LCP) is a key web performance metric determining the largest visible element's render time. It signifies when users perceive a page as visually complete by focusing on critical content like hero images or text elements.
Considerations for LCP
LCP can shift during page load as various content elements load. Elements like hero images or prominent text play a crucial role in defining the user's perception of page loading completion. Tracking the final LCP candidate ensures accurate measurement of when critical content is ready for user interaction.
Importance of Web Performance Metrics
Being aware of web performance metrics, like Largest Contentful Paint (LCP), helps in optimizing the user experience. LCP signifies when a page is considered ready for a user to engage and can provide insights into user behavior patterns, such as prioritizing above-the-fold content or lazy loading images strategically. Understanding common causes of LCP and utilizing analytics to identify optimization areas is crucial in enhancing loading performance on web pages.
Significance of Core Web Vitals and Tools for Measurement
Focusing on Core Web Vitals, like Cumulative Layout Shift (CLS), is vital for improving user engagement and conversions on websites. CLS measures unexpected content shifts during page layout, impacting the user experience. Tools like Chrome User Experience Report and PageSpeed Insights aid in evaluating web performance metrics and identifying areas for improvement, emphasizing the importance of continuous monitoring and optimization for a seamless browsing experience.
This week, Amal and Nick are joined by Rick Viscomi and Annie Sullivan from the Chrome team to dive into Core Web Vitals, a set of performance metrics geared towards helping developers surface web page quality signals that are key to delivering great user experiences.
We deconstruct the different vitals and learn how they are helpful, as well as introduce the newest vital to hit the scene, Interaction to Next Paint (INP). Join us for a fun and nerdtastic discussion as we dive into the humbling universe of web performance!
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