CSS Masking

Subject: css

CSS Masking

CSS Masking allows you to hide or reveal parts of an element using another image or shape. This technique is useful for creating advanced visual effects such as clipping, shaped containers, text reveals, and layered designs—without modifying the actual image.

Why Use CSS Masking?

  • Apply shape-based transparency effects
  • Create dynamic transitions and overlays
  • Hide/reveal content in a visually controlled way
  • Avoid editing images manually in graphic design tools

Syntax

🚀 Try it in Compiler

Or using shorthand:

🚀 Try it in Compiler

Example: Basic Masking with SVG Shape

🚀 Try it in Compiler

Note: This uses an SVG shape to mask a square image.

Example: Circular Mask Using Gradient

🚀 Try it in Compiler

Best Practices

  • Use SVG or PNG for detailed and shape-specific masks
  • Always define both mask-* and -webkit-mask-* for cross-browser compatibility
  • Use mask-image with gradients for creative transitions
  • Optimize image sizes for performance

Browser Support

  • Most modern browsers support mask-image, especially WebKit-based browsers like Chrome and Safari
  • Firefox supports standard masking properties
  • Not supported in Internet Explorer

Key Takeaways

  • CSS Masking allows you to control element visibility using image or shape masks
  • Use mask-image, mask-size, and mask-position to define masks
  • Supports both SVG and CSS gradients for masking
  • Combine with transitions and animations for creative UIs
  • Use -webkit- prefixes for better cross-browser support
Next: CSS Image Gallery