Answer
Browser compatibility issues happen when a feature behaves differently or is unsupported in some browsers. • Use web standards and check feature support. • Test the browsers and devices your users need. • Provide a simple fallback for important tasks.
💡 Simple Example
<p>A new input type may fall back to a normal text box in an older browser.</p>
⚡ Quick Revision
Compatibility work uses standards, testing, and useful fallbacks.