refactor(bundle-size)!: extract Tab keydown handler into opt-in module#549
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refactor(bundle-size)!: extract Tab keydown handler into opt-in module#549layershifter wants to merge 20 commits into
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\`patch-package\` postinstall hook applies three changes to keyborg@2.14.0 covering both the ESM (\`dist/index.js\`) and CJS (\`dist/index.cjs\`) bundles: 1. \`event.details = details\` — drop the \`@deprecated\` alias of \`event.detail\`. Tabster reads \`e.detail\` exclusively (verified across src/State/FocusedElement.ts and the rest of the codebase). 2. \`triggerKeys\` / \`dismissKeys\` props + the supporting \`shouldDismiss\` / \`scheduleDismiss\` / \`dismissTimer\` machinery. Tabster only ever calls \`createKeyborg(getWindow())\` with no props. 3. \`canOverrideNativeFocus\` runtime probe. Replaces the \`_canOverrideNativeFocus\` flag with the implicit-true assumption modern browsers (everything since IE9) already satisfy. The conditional \`details.isFocusedProgrammatically\` write becomes unconditional — semantically identical when override works. Bundle deltas (createTabster default-mode): keyborg slice: 3.71 → 3.12 kB (-590 B, -16%) createTabster: 30.78 → 30.18 kB (-600 B) getModalizer: 38.47 → 37.87 kB (-600 B) getMover: 44.54 → 43.94 kB (-600 B) getCrossOrigin: 89.64 → 89.04 kB (-600 B) allExports: 92.09 → 91.50 kB (-590 B) Tests pass: 3 pre-existing failures, no regressions across default, uncontrolled, and root-dummy-inputs modes. Stop-gap until upstream microsoft/keyborg can release the same trims (the changes belong there, not as a Tabster-side fork). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Converts the `Subscribable<A, B>` abstract class and its consumers to factory functions returning plain objects. - `Subscribable` → `createSubscribable<A,B>()` factory returning a `SubscribableCore` interface. The public surface (subscribe/ subscribeFirst/unsubscribe) matches `Types.Subscribable`; setVal/ getVal/trigger are exposed for the composing factory only. - `KeyboardNavigationState` class → `createKeyboardNavigationState` factory. - `FocusedElementState` class → `createFocusedElementState` factory. `FocusedElementState` is preserved as a const namespace for the `forgetMemorized` and `findNextTabbable` static helpers. - `ObservedElementAPI` class → `createObservedElementAPI` factory. - `CrossOriginFocusedElementState` class → `createCrossOriginFocusedElementState` factory, with `setVal` static kept under same-named const namespace. - `CrossOriginObservedElementState` class → `createCrossOriginObservedElementState` factory, with `trigger` static kept under same-named const namespace. Also trims `Subscribable` itself: drops the `callCallbacks` helper in favour of the inlined `trigger` closure, and adds `declare` to `TabsterCustomEvent.details` to drop the redundant initializer SWC was emitting. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
DummyInput was 23.6% of the core bundle (the single largest module).
Converting the four classes here in one coordinated pass:
- DummyInput → createDummyInput
- DummyInputManager → createDummyInputManager (interface + factory),
with externally-used statics moveWithPhantomDummy
and addPhantomDummyWithTarget kept under a same-
named const namespace
- DummyInputManagerCore → createDummyInputManagerCore. The class's
constructor-return-existing-instance trick (used
when an element already has dummy inputs from
another subsystem) becomes a natural early-return
in a factory.
- DummyInputObserver → createDummyInputObserver
The four DummyManager subclasses (RootDummyManager, ModalizerDummyManager,
MoverDummyManager, GroupperDummyManager) are migrated from `extends
DummyInputManager` to composing `createDummyInputManager` and calling
`manager.setHandlers(...)` directly. They become free functions
(createRootDummyManager etc.) returning the same DummyInputManager
interface, so the consuming `dummyManager` field on Root/Modalizer/Mover/
Groupper is now typed as the interface rather than the subclass.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Class scaffolding (constructor + private field declarations + this-binding on arrow methods) doesn't mangle as well as plain top-level functions and closures. Switching RestorerAPI to a factory shaves ~570 B minified / ~45 B gzipped on getRestorer. Pattern: closures replace private fields; the returned object exposes only the public methods the interface requires. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Static methods (getDeloser, getHistory, forceRestoreFocus) are kept under a same-named const namespace, so external call sites in CrossOrigin.ts continue to work unchanged. The internal state needed by those statics is exposed via an internal interface with _-prefixed accessors. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…actory conversions Apply post-cherry-pick fixes across all 8 converted API factories: - Use addListener/removeListener helpers (PR4) instead of direct addEventListener - Use focusedElementState method calls instead of missing free-function exports - Expose _grouppers/_modalizers as internal getters for test compatibility - Add _grouppers and _modalizers to GroupperAPIInternal/ModalizerAPIInternal types - Exclude generated bundle-size/.readable/ and .claude/ from prettier checks Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…urface Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…for tree-shaking Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…a getRootDummyInputs
📊 Bundle size report
🤖 This report was generated against a579ebbd50e37f1565551549fe57bbc9ddafab64 |
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Summary
Moves the Tab-key keydown handler out of
FocusedElementStateinto a newTab.tsmodule. The handler is installed bygetRootDummyInputs, so consumers usingcontrolTab: falseand not opting intogetRootDummyInputswon't ship the handler at all.findNextTabbable(the dispatch function the handler uses) andisTabbingalso move toTab.ts. Feature factories (Mover/Groupper/Modalizer) still register their strategies viatabster.findNextTabbableStrategiesfrom #545.Breaking change
Consumers passing
controlTab: falseneed to explicitly callgetRootDummyInputs(tabster)if they rely on the Tab-key handler running in uncontrolled mode. DefaultcreateTabster(win)(which hascontrolTab: true) is unaffected —getRootDummyInputsis auto-called from #548.Stack context
Stacked on top of #548. Net new in this PR: the Tab-key handler extraction into
Tab.ts.