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https://github.com/bulwarkmail/native.git
synced 2026-10-31 16:06:32 +00:00
Linus Rath
82ca359df7
`index.ts` imported `App` at the top, so when an FCM data message started the headless push task in a cold process, the bundle evaluated every screen, store, catalog and icon before the task could show its notification. The headless task is still registered at the top of `index.ts`, but the root component now requires `App` when the UI first renders. A headless start therefore only evaluates the task and its own imports; a normal launch evaluates the same modules as before, one render later. Measured with `npx expo export --platform android` (modules reached through top-level requires from the entry, i.e. what a headless start evaluates): 1,516 modules, 7,238 KB -> 202 modules, 745 KB.
24 lines
1.0 KiB
TypeScript
24 lines
1.0 KiB
TypeScript
import { createElement } from 'react';
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import { AppRegistry } from 'react-native';
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import { registerRootComponent } from 'expo';
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import { pushBackgroundTask } from './src/lib/push-background-task';
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// Runs in a fresh headless JS runtime when BulwarkPushTaskService is started
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// from BulwarkMessagingService on an FCM data message. Must be registered
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// before the native service tries to invoke the task.
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AppRegistry.registerHeadlessTask('BulwarkPushTask', () => pushBackgroundTask);
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// A headless push task evaluates this file too, so App is required when the
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// UI first renders instead of imported above: importing it here would load
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// every screen, store and icon before the task could run.
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function Root() {
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const App = (require('./App') as typeof import('./App')).default;
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return createElement(App);
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}
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// registerRootComponent calls AppRegistry.registerComponent('main', () => Root);
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// It also ensures that whether you load the app in Expo Go or in a native build,
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// the environment is set up appropriately
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registerRootComponent(Root);
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