Question 1

web-vitals-element vs Google's web-vitals library: which should I use?

Accepted Answer

web-vitals-element is a visualization tool built on Google's web-vitals library, providing a ready-to-use UI element for quick displays. Use the element for simple in-page metrics; use the library directly if you need programmatic access or custom implementations.

Question 2

How to customize the style of web-vitals-element?

Accepted Answer

Since it doesn't use shadow DOM, you can style it with regular CSS. Use the unstyled version and apply your own CSS, or override the styled version's classes. The README mentions it renders as regular HTML for straightforward styling.

Question 3

Is web-vitals-element accurate for real user monitoring?

Accepted Answer

It provides real-time metrics from the user's browser, which are accurate for that session, but it doesn't store or aggregate data over time. It's best for development feedback, not for production analytics requiring historical trends.

Question 4

What browsers support web-vitals-element fully?

Accepted Answer

It depends on the Web Vitals API, which is supported in modern browsers like Chrome, Firefox, and Edge. Older browsers may lack support for some metrics, and the 'show-unsupported' attribute can help indicate this, as noted in the README.

Question 5

Can I use web-vitals-element with React or Vue.js?

Accepted Answer

Yes, because it's a standard custom element, it can be integrated into any framework that supports HTML. In frameworks like React, you might need to handle it as a native element, possibly using refs or lifecycle methods.

Question 6

Does adding web-vitals-element slow down my page?

Accepted Answer

As a lightweight script, the performance impact is minimal, but since it measures metrics in real-time, there could be a minor overhead. It's designed for development use where this trade-off is acceptable.

<web-vitals>

What is <web-vitals>?

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