@supports

@supports is a CSS at-rule in the At-rules category. Applies styles only when the browser supports a feature. The syntax is @supports (<condition>) { /* rules */ }. A typical example: @supports (display: grid) { .grid { display: grid; } } It is commonly applied to markup such as <div class="demo">Sample</div> Browser support: Chrome 28+, Firefox 22+, Safari 9+, Edge 12+. A close relative is @media, which applies styles conditionally based on device features like viewport width. A close relative is @keyframes, which defines animation sequences with named keyframes. A close relative is @font-face, which defines custom fonts to be downloaded and used in the document. More about this category: CSS at-rules — @media, @keyframes, @font-face, @supports and more. Related At-rules entries: @media, @keyframes, @font-face, @import, @container, @layer, @scope, @starting-style. This page is part of the free CSS Reference documentation covering 841+ properties, selectors, functions, and at-rules, each with syntax, values, examples, and browser support.