Web Platform Baseline Status Breakdown
Total Features: 1219
Categories:
All
JavaScript (11)
Selectors (9)
CSS (7)
WebGL extensions (6)
Typographic font features (5)
Clipping, shapes, and masking (4)
Fonts (4)
HTML elements (4)
Text (4)
Web components (4)
Animation (3)
Blend mode (3)
Image formats (3)
SVG (3)
Scrolling (3)
Strings (3)
Arrays (2)
Color types (2)
Explicit defaults (2)
Forms (2)
Internationalization (2)
Media queries (2)
Promises (2)
WebAssembly (2)
WebRTC (2)
CSS environment variables (1)
CSS object models (1)
Canvas (1)
Credential management (1)
Custom elements (1)
DOM (1)
Gradients (1)
Images (1)
Iterators (1)
Layout (1)
Messaging (1)
Multi-column (1)
Resource hints (1)
Security (1)
Text wrap (1)
Transitions (CSS) (1)
Units (1)
2020
4 features
• July 2020
Widely Available
The part and exportparts HTML attributes expose elements of a shadow DOM as named parts, which can be selected by the ::part() CSS pseudo-element for styling.
Chrome
73
Firefox
72
Safari
13.1
Edge
79
Baseline Date: Jul 28, 2020
• January 2020
The :host CSS pseudo-class selects the containing element of the shadow tree in which it is used. The :host() CSS pseudo-class selects the that element only if it matches the provided selector.
Chrome
54
Firefox
63
Safari
10
Edge
79
Baseline Date: Jan 15, 2020
Widely Available
Shadow DOM allows you to attach encapsulated "shadow" DOM trees to elements. A shadow DOM tree is a separate component, isolated from the scripts and styles in other parts of the document. This is a part of Web Components.
Chrome
53
Firefox
63
Safari
10
Edge
79
Baseline Date: Jan 15, 2020
Widely Available
The <slot> HTML element is a placeholder inside a web component where consumers of the component can insert their own markup.
Chrome
53
Firefox
63
Safari
10
Edge
79
Baseline Date: Jan 15, 2020