Webapp masthead metadata
The webapp masthead shows build identity, the configured thread count, and two independent runtime facts in one text row.
Build and thread values
| Value | Meaning |
|---|---|
vX.Y.Z |
The application version. |
vX.Y.Z+N |
A build made N commits after that version. The +N is omitted on the version commit. |
abcdef0 (sha) |
The seven-character commit identifier for a clean build. |
abcdef0* (sha*) |
The source commit with * appended; * means uncommitted changes were present when the build was made. |
10 threads |
The full thread-count label shown on desktop. |
10T |
The compact mobile thread-count label; T means threads. |
The version text normally looks like vX.Y.Z · abcdef0. The full build identifier, including a branch or dirty-build suffix when applicable, is available from the version tooltip.
Runtime values
| Value | Meaning |
|---|---|
web |
The page is running in a normal browser tab or window. |
pwa |
The page was launched as an installed/standalone PWA. A PWA can also use a service worker. |
sw |
A service worker controls the page or is installed and ready to take control. Its tooltip distinguishes those states. |
sw off |
Service-worker offline support is disabled, unavailable, or registration failed. |
The first value describes how the page was launched; the second describes service-worker state. The combinations are therefore independent, such as web · sw, pwa · sw, or pwa · sw off. The prerendered shell resolves known runtime state before first paint, then React hydrates that shell in place instead of replacing the masthead nodes. While service-worker state is still unknown, the shell preserves the sw placeholder and adds a tooltip after the state resolves.
The thread count is shown as · 10 threads on desktop and · 10T on mobile to preserve masthead space. The full wording remains available to assistive technology and in the tooltip.
Theme
The masthead theme control switches between light and dark themes. Documentation screenshots use the selected theme.