fix: unset removed marker style properties

[chrisgervang]

Fixes #2595 with a fresh implementation of the intent behind #2596 on current master.

Applied style keys are tracked per element; removed or nullish keys are cleared before new values so shorthand transitions work and unrelated inline styles remain untouched.

Mapbox and MapLibre have matching regression coverage for undefined, null, omission, whole-style removal, reapplication, and shorthand/longhand transitions.

Tested with yarn lint, yarn test ci, and both module TypeScript checks.

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Note

Low Risk
Localized DOM styling helper change with broad regression tests; no auth, data, or API surface changes.

Overview
applyReactStyle now tracks which style keys it applied per DOM element (via a WeakMap) and clears keys that disappear from the next style object—undefined, null, omission, or null/undefined for the whole style—so marker/control inline styles don’t stick after React updates.

The same logic is applied in react-mapbox and react-maplibre. null/undefined styles are treated as empty updates (only previously managed keys are cleared). Inline properties not set by this helper are left unchanged. Shorthand/longhand transitions (e.g. padding vs paddingTop) are handled by clearing dropped keys before applying new ones.

Regression tests cover unset behavior, shorthand transitions, and unmanaged inline styles in both modules.

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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Tests use incompatible tape assertions

Medium Severity

The new regression tests call tape-style t.is and t.end, but this suite runs on Vitest and the existing test in the same file uses expect. Vitest's test context has no those methods, so these cases throw at runtime and never validate the unset behavior.

Additional Locations (1)

• modules/react-maplibre/test/utils/apply-react-style.spec.js#L24-L93

 

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