BASELINE NowYouCanUse.com
Web Platform Baseline Status Breakdown Total Features: 1219
Widely Available 655 (53.73%)
Newly Available 120 (9.84%)
Limited 444 (36.43%)
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Status: All Newly Available
Categories: All CSS (6) Text (4) Units (4) Workers (3) Color types (2)
Container queries (2) JavaScript (2) JavaScript modules (2) Reporting (2) Selectors (2) Streams (2) WebAssembly (2) Animation (1) Clipping, shapes, and masking (1) Explicit defaults (1) HTML (1) Image scaling (1) Internationalization (1) Iterators (1) Maps (1) MathML (1) Scrolling (1) Security (1) View transitions (1)
Years: All 2026 2023 2018 2015
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Showing 3 of 3 features

2026

3 features
• May 2026

Shared worker

Trending #11 Workers
Newly Available

The SharedWorker() constructor runs a script in its own thread, which can send and receive messages with other scripts running at the same origin.

Chrome 5
Firefox 29
Safari 16
Edge 79
Baseline Date: May 5, 2026

JavaScript modules in shared workers

JavaScript modules
Newly Available

The SharedWorker() constructor accepts { type: "module" } to load scripts that use import and export. Also known as ECMAScript modules or ESM in shared workers.

Chrome 80
Firefox 114
Safari 16
Edge 80
Baseline Date: May 5, 2026
• January 2026

JavaScript modules in service workers

JavaScript modules
Newly Available

The navigator.serviceWorker.register() method accepts { type: "module" } to load scripts that use import and export. Also known as ECMAScript modules or ESM in service workers.

Chrome 91
Firefox 147
Safari 15
Edge 91
Baseline Date: Jan 13, 2026