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Web Platform Baseline Status Breakdown Total Features: 1219
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Status: All Limited
Categories: All CSS (102) HTML elements (100) Selectors (46) JavaScript (43) Forms (42)
WebGL extensions (37) Text (26) WebAssembly (22) Media queries (21) Scrolling (20) Fonts (19) Performance (19) Arrays (17) Layout (17) HTML (16) Progressive web app (15) Typed arrays (14) Units (14) Canvas (13) Color types (13) Strings (13) Background (12) Media elements (12) Security (12) Animation (11) Clipping, shapes, and masking (11) Web components (11) WebXR (11) Typographic font features (10) DOM (9) Internationalization (9) Iterators (9) Reporting (9) Text wrap (9) Workers (9) Clipboard (8) CSS object models (7) Containment (7) Fetch (7) JavaScript modules (7) Print media (7) Sensors (7) Container queries (6) Explicit defaults (6) Image formats (6) Landmark elements (6) Multi-column (6) Positioning (6) Promises (6) SVG (6) Storage (6) Streams (6) Credential management (5) Custom elements (5) Font synthesis (5) HTTP (5) Lists (5) Messaging (5) Resource hints (5) Ruby (5) Selection (5) Speech (5) Transitions (CSS) (5) View transitions (5) Web audio (5) WebGL (5) Anchor positioning (4) Cookies (4) Counters (4) File system access (4) Flexbox (4) Gamepad (4) Grid (4) Images (4) Primitive types (4) Regular expressions (4) WebDriver (4) WebRTC (4) Blend mode (3) Borders and outlines (3) Geolocation (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) IndexedDB (2) Parsing and serialization (2) Resource integrity (2) Sets (2) Text fragments (2) WebMCP (2) CSS environment variables (1)
Years: All
Showing 2 of 2 features

Limited Availability

2 features
• In Progress / Not Yet Baseline

The CreateVirtualPressureSource WebDriver command creates artificial sources of compute pressure for testing without the need real device sources of compute pressure.

Chrome 129
Firefox —
Safari —
Edge 129
Status: Incomplete cross-engine support

The PressureObserver API monitors CPU load, allowing you to adjust workloads in response to available computing resources. Also known as the Compute Pressure API.

Chrome 125
Firefox —
Safari —
Edge 125
Status: Incomplete cross-engine support