HTML5 Please

CSS features

Layout, color, typography and visual effects in CSS. Whether each property is safe to ship, and how to fall back when it is not.

41 features, each with a plain verdict on whether it is safe to ship today and how to handle older browsers. Browse the other categories: HTML features JavaScript APIs. Or use the feature finder to filter and search everything at once.

Safe to use (27)

<svg>
use · svg
@font-face
use · css
background-image options
use · css
border-image
use · css
border-radius
use · css
box-shadow
use · css
box-sizing
use · css
calc()
use · css
CSS Animations
use · css
css3 colors
use · css
flexbox
use · css
font-feature-settings
use · css
gradients
use · css
hyphens
use · css
media queries
use · css
multicolumn
use · css
multiple backgrounds
use · css
opacity
use · css
pointer events
use · css
position:fixed
use · css
pseudo elements
use · css
rem unit
use · css
selectors
use · css
text-overflow
use · css
text-shadow
use · css
transforms
use · css
transitions
use · css

Use with caution (7)

@supports
caution · css
css filters
caution · css
grids
caution · css
Interaction media features
caution · css
masks
caution · css
position:sticky
caution · css
Viewport units (vh, vw, vmin, vmax)
caution · css

Better to avoid (7)

box-reflection
avoid · css
exclusions
avoid · css
fit-content
avoid · css
paged media
avoid · css
regions
avoid · css
style[scoped]
avoid · css
text-stroke
avoid · css