chore(deps): upgrade Electron to 42.2.0#117
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Major bump from 38.8.6 to 42.2.0, resolving the remaining high-severity audit finding (electron <=39.8.4, 17 advisories). Reviewed Electron breaking changes for v39-42 against our main-process API usage (app, BrowserWindow, ipcMain/Renderer, webContents, session.webRequest, protocol.handle, Menu, dialog, shell, screen, net): no code changes required. None of the removed/deprecated APIs are used. Notes: - leveldown 6.x ships N-API prebuilds (ABI-stable), so no native module rebuild is needed for the new Node ABI. - macOS notifications now use UNNotification (v42): they require a code-signed app to display. Release builds are signed; unsigned dev builds will emit a 'failed' event instead. - nativeWindowOpen webPreference (WindowManager.js) has been a no-op since v22; left as-is, not introduced here. Validated by launching the app on Electron 42: renderer runs un-sandboxed as required by nodeIntegration, leveldown loads, preload initializes correctly.
The app:// protocol handler returned net.fetch() directly, so a request for a missing file produced a rejected handler promise instead of a proper response, surfacing as a net::ERR_FILE_NOT_FOUND error. The handler now always resolves to a Response (404 on a missing file). Also documents build hygiene in the README: a partial webpack build can leave dist/ with a mismatched bundle and source map, which freezes the renderer when DevTools is opened. A clean rebuild resolves it.
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Summary
Upgrades Electron from 38.8.6 to 42.2.0, resolving the last remaining high-severity npm audit finding (
electron <=39.8.4, 17 advisories).Changes
electron38.8.6 → 42.2.0 (package.json^42.2.0)app://protocol handler so it always resolves to aResponse(404 on a missing file) instead of returning a rejectednet.fetch()promise, which surfaced as anet::ERR_FILE_NOT_FOUNDerrorBreaking change review (v39–42)
Reviewed Electron's
breaking-changes.mdfor v39–42 against our main-process API usage (app,BrowserWindow,ipcMain/ipcRenderer,webContents,session.webRequest,protocol.handle,Menu,dialog,shell,screen,net). No code changes required — none of the removed or deprecated APIs are used.Notes:
leveldown6.x ships N-API prebuilds (ABI-stable) — no native module rebuild needed for the new Node ABI.UNNotification(v42) and require a code-signed app to display; release builds are signed, unsigned dev builds emit afailedevent instead.nativeWindowOpenwebPreference has been a no-op since v22 (left as-is).Validation
nodeIntegration,leveldownloads, preload initializes correctly.npm run lint: clean · test suite: 332 passing.Note on the DevTools freeze
While testing, opening Chrome DevTools froze the renderer. Investigation (stack sampling the frozen renderer — main thread blocked in
mach_msg) traced this to a mismatched bundle/source map in a partially builtdist/, not an app-code or Electron 42 defect: a clean rebuild does not freeze, andnpm run hotnever did. There is no freeze-related code fix here — the README now documents the build-hygiene workaround.