📌 What is Browser Compatibility?

Browser compatibility refers to how well different web browsers support various CSS features. Ensuring cross-browser compatibility is essential for delivering a consistent user experience across devices and platforms.

1️⃣ Types of CSS Properties & Browser Support

✔️ Well-Supported Properties

Most modern browsers support basic CSS properties, including:

• color, font-size, background-color, margin, padding, border, etc.
• These properties are safe to use across all browsers without compatibility concerns.

⚠️ Properties with Partial/Conditional Support

Some advanced CSS features may have limited support, especially in older browsers:

• CSS Grid → Fully supported in modern browsers, but older versions of IE lack support.
• Flexbox → Supported in most browsers but had early inconsistencies in older versions.
• CSS Variables (Custom Properties) → Not supported in Internet Explorer (IE 11 and below).
• Subgrid (CSS Grid Level 2) → Still not fully supported in Safari.

2️⃣ How to Ensure Cross-Browser Compatibility?

✅ Use Feature Detection with @supports

To check if a browser supports a CSS feature before applying it: