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chore(deps): patch keyborg to drop unused / legacy code paths#539

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layershifter:chore/bundle-size-stack-2
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chore(deps): patch keyborg to drop unused / legacy code paths#539
layershifter wants to merge 2 commits into
microsoft:masterfrom
layershifter:chore/bundle-size-stack-2

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Summary

Applies a patch-package patch to keyborg removing code paths that Tabster doesn't exercise. Saves bytes in the final bundle that includes keyborg.

The patch is applied automatically via postinstall (already wired). No other code is touched.

Stack context

Stacked on top of #538. Net new in this PR: the keyborg patch + package-lock update.

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github-actions Bot commented May 11, 2026

📊 Bundle size report

Package & Exports Baseline (minified/GZIP) PR Change
tabster
all exports
113.84 kB
30.937 kB
113.225 kB
30.742 kB
-615 B
-195 B
tabster
createTabster (core)
39.761 kB
11.892 kB
39.148 kB
11.712 kB
-613 B
-180 B
tabster
focusable.findAll
0 B
0 B
39.171 kB
11.721 kB
🆕 New entry
tabster
focusable.findLast
0 B
0 B
39.172 kB
11.72 kB
🆕 New entry
tabster
focusable.findNext
0 B
0 B
39.172 kB
11.72 kB
🆕 New entry
tabster
focusable.findPrev
0 B
0 B
39.172 kB
11.72 kB
🆕 New entry
tabster
getCrossOrigin
110.623 kB
30.244 kB
110.001 kB
30.048 kB
-622 B
-196 B
tabster
getDeloser
49.268 kB
14.234 kB
48.654 kB
14.053 kB
-614 B
-181 B
tabster
getGroupper
47 kB
13.593 kB
46.387 kB
13.413 kB
-613 B
-180 B
tabster
getModalizer
49.072 kB
14.378 kB
48.459 kB
14.194 kB
-613 B
-184 B
tabster
getMover
54.653 kB
15.887 kB
54.037 kB
15.695 kB
-616 B
-192 B
tabster
getObservedElement
45.564 kB
13.484 kB
44.951 kB
13.303 kB
-613 B
-181 B
tabster
getOutline
48.867 kB
14.216 kB
48.239 kB
14.027 kB
-628 B
-189 B
tabster
getRestorer
42.518 kB
12.52 kB
41.905 kB
12.346 kB
-613 B
-174 B

🤖 This report was generated against a579ebbd50e37f1565551549fe57bbc9ddafab64

\`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>
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