What are some ways to resolve compatibility issues with Internet Explorer on my Webflow website?

Internet Explorer (IE) compatibility issues can occur because Webflow-generated sites use modern HTML, CSS, and JavaScript features not supported by IE. Here’s how you can address or work around those issues.

1. Understand IE’s Limitations

• IE11 is the last supported version, and even that lacks full support for CSS Flexbox, Grid, CSS variables, and modern JavaScript (ES6+).
• Microsoft recommends using Edge; IE is considered deprecated as of June 15, 2022.

2. Identify What’s Broken in IE

• Use BrowserStack or similar tools to preview your Webflow site in IE.
• Manually test on an IE11 installation (if available).
• Make a list of broken layouts or non-functional scripts.

3. Adjust CSS Features in Webflow Designer

• Avoid CSS Grid—IE doesn’t fully support modern Grid. Use Flexbox with caution (ensure no auto margins or wrapping tricks).
• Avoid custom properties (CSS variables)—Webflow may inject them in custom code or embed code.
• Use fallback properties for any CSS that may not be recognized.
• Stick to widely supported CSS units and properties (avoid clamp(), min(), max()).

4. Use Feature Detection or Fallbacks in Custom Code

• If you’re using custom JavaScript, use feature detection (e.g., typeof Promise !== 'undefined') to check if IE supports it.
• Avoid ES6 syntax (like arrow functions or let/const) unless transpiled.

5. Add a Browser Upgrade Notice

• Consider adding a banner or modal popup using Webflow interactions or custom JavaScript to inform users they’re using an outdated browser.
• Example content: “This site uses modern web technologies. Please upgrade your browser for the best experience.”

6. Use Polyfills (Optional but Limited)

• You can include polyfills (from services like Polyfill.io) to patch certain missing JavaScript features.

• Include a script tag in Project Settings > Custom Code > Head Code:

• Example (inline use only):
  https://polyfill.io/v3/polyfill.min.js?features=default

• Note: Polyfills have limited impact on CSS compatibility.

7. Avoid Webflow Features That Rely on Modern APIs

• Animations built with Interactions 2.0 may not run reliably.
• Lottie animations may not work in IE or render incorrectly.
• Sliders, tabs, and dropdowns are generally safe, but test them.

8. Consider Dropping IE Support

• Usage of IE globally is below 1%. If your audience doesn't rely on it, you may choose to:
• Include messaging rejecting support for IE, or
• Redirect IE users to a static fallback or message page using custom code.

Summary

To resolve IE compatibility issues in Webflow, stick to basic layout structures, avoid modern CSS/JS features, test thoroughly, and optionally inform users to upgrade. Full compatibility isn't guaranteed due to IE's legacy nature, and long-term support is not advisable.