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Web Platform Baseline Status Breakdown Total Features: 1191
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Categories: All CSS (101) HTML elements (98) Selectors (46) JavaScript (43) Forms (40)
WebGL extensions (37) WebAssembly (22) Media queries (21) Fonts (19) Performance (19) Text (19) Scrolling (18) Arrays (17) Layout (17) HTML (16) Progressive web app (15) Typed arrays (14) Units (14) Canvas (13) Background (12) Color types (12) Media elements (12) Strings (12) Clipping, shapes, and masking (11) Security (11) Web components (11) WebXR (11) Typographic font features (10) Animation (9) Internationalization (9) Reporting (9) Text wrap (9) Clipboard (8) Workers (8) Containment (7) DOM (7) Fetch (7) JavaScript modules (7) Print media (7) Sensors (7) CSS object models (6) Image formats (6) Iterators (6) Landmark elements (6) Positioning (6) Promises (6) SVG (6) Storage (6) Streams (6) Credential management (5) Custom elements (5) Explicit defaults (5) Font synthesis (5) HTTP (5) Messaging (5) Multi-column (5) Resource hints (5) Ruby (5) Selection (5) Speech (5) Transitions (CSS) (5) View transitions (5) Web audio (5) WebGL (5) Container queries (4) Cookies (4) Counters (4) File system access (4) Flexbox (4) Gamepad (4) Grid (4) Images (4) Lists (4) Primitive types (4) Regular expressions (4) WebDriver (4) WebRTC (4) Blend mode (3) Borders and outlines (3) Gradients (3) Image scaling (3) JSON (3) Maps (3) MathML (3) Payments (3) Reading order (3) Scroll markers (3) Transforms (3) WebAuthn (3) WebGPU (3) White space (3) Worklets (3) XML (3) Collections (2) Compute pressure (2) Geolocation (2) IndexedDB (2) Parsing and serialization (2) Resource integrity (2) Sets (2) Text fragments (2) WebMCP (2) CSS environment variables (1)
Showing 7 of 7 features

2021

1 features
• November 2021
Widely Available

The fit-content CSS keyword expands a box as needed to fit its contents until the maximum size is reached, preserving the content's preferred aspect ratio.

Chrome 46
Firefox 94
Safari 11
Edge 79
Baseline Date: Nov 2, 2021

2020

1 features
• January 2020

The min-content and max-content CSS keywords represent the smallest and largest intrinsic sizes of an element.

Chrome 46
Firefox 66
Safari 11
Edge 79
Baseline Date: Jan 15, 2020

2019

1 features
• January 2019
Widely Available

In printed page layouts, the break-after, break-before, break-inside CSS properties control where printed pages start and end. Also known as pagination or page breaking.

Chrome 50
Firefox 65
Safari 10
Edge 12
Baseline Date: Jan 29, 2019

2015

4 features
• July 2015
Widely Available

The width and height CSS properties set the preferred physical size of an element.

Chrome 1
Firefox 1
Safari 1
Edge 12
Baseline Date: Jul 29, 2015
Widely Available

The box-sizing CSS property sets whether an element's width and height are calculated based on the content-box, which does not count the size of borders or padding, or border-box, which does count them.

Chrome 10
Firefox 29
Safari 5.1
Edge 12
Baseline Date: Jul 29, 2015
Widely Available

The margin CSS property sets space around an element. It is a shorthand for margin-top, margin-right, margin-bottom, and margin-left.

Chrome 1
Firefox 1
Safari 1
Edge 12
Baseline Date: Jul 29, 2015
Widely Available

The padding CSS property sets space between an element's edge and its contents. It is a shorthand for padding-top, padding-right, padding-bottom, and padding-left.

Chrome 1
Firefox 1
Safari 1
Edge 12
Baseline Date: Jul 29, 2015