Where can I start to resolve an 'INP issue' with mobile views for a Webflow site flagged by Google search console?
TL;DR
- Use PageSpeed Insights to identify slow interactions and performance bottlenecks.
- Limit complex Webflow interactions, defer or remove non-essential scripts, and reduce JavaScript execution time.
- Optimize fonts, images, and animations; simplify mobile layouts; and test responsiveness on real devices.
An 'INP issue' (Interaction to Next Paint) in mobile views flags poor responsiveness in user interactions. Google Search Console reports it when user input (like tap or scroll) causes delayed visual updates.
1. Understand What INP Measures
- INP (Interaction to Next Paint) measures how fast a site responds to user interactions.
- A good INP score should be less than 200ms.
- INP is part of Core Web Vitals, and primarily affects mobile performance and SEO.
2. Use Google PageSpeed Insights
- Go to PageSpeed Insights and enter your site URL.
- Scroll to the "Diagnostics" and "Opportunities" sections to pinpoint JS, layout shifts, or third-party scripts causing delays.
- Check which interactions are slow — e.g., tap delays, animation lags, or sluggish menus.
3. Audit Webflow Interactions & Embeds
- Limit complex interactions/triggers on mobile (e.g., hover-to-open nav menus don’t work well on touch).
- Review elements using Webflow Interactions or custom code that may cause delays.
- Collapse hidden elements such as off-canvas menus or accordions when not needed on load.
4. Reduce JavaScript Execution Time
- Large or poorly optimized scripts slow interaction.
- Remove or defer non-critical third-party scripts (like chat widgets, unnecessary analytics tags).
- In Page Settings > Before </body> tag, optimize or eliminate added scripts.
5. Check Fonts, Animations, and Lazy Loading
- Avoid custom font overload — limit variations (weights/styles).
- Use Webflow’s built-in loading="lazy" for large images and avoid layout shifts with defined width/height.
- Avoid heavy entrance animations on mobile for key interactive elements.
6. Simplify Mobile Layouts and Test on Devices
- Use Webflow’s responsive preview to clean up complex layouts that may reflow or jump during interaction.
- Test interactions on actual mobile devices using Chrome DevTools > Performance Tab to record responsiveness.
7. Leverage Webflow Hosting Performance
- Ensure your domain is properly pointed to Webflow’s servers with A records: (a) 75.2.70.75, (b) 99.83.190.102.
- Use WebP images, optimized SVGs, and components instead of large PNGs or videos.
Summary
To resolve an INP issue on mobile in Webflow, optimize scripts, minimize complex interactions, simplify mobile layouts, and use tools like PageSpeed Insights to trace bottlenecks. Improving JavaScript execution and visual response to taps significantly enhances the user experience and INP score.