568244232e
## Summary Set up the experiment to migrate event dispatching in the React Native renderer to be based on the native EventTarget API. Behind the `enableNativeEventTargetEventDispatching` flag, events are dispatched through `dispatchTrustedEvent` instead of the legacy plugin system. Regular event handler props are NOT registered via addEventListener at commit time. Instead, a hook on EventTarget (`EVENT_TARGET_GET_DECLARATIVE_LISTENER_KEY`) extracts handlers from `canonical.currentProps` at dispatch time, shifting cost from every render to only when events fire. The hook is overridden in ReactNativeElement to look up the prop name via a reverse mapping from event names (built lazily from the view config registry). Responder events bypass EventTarget entirely. `negotiateResponder` walks the fiber tree directly (capture then bubble phase), calling handlers from `canonical.currentProps` and checking return values inline. Lifecycle events (`responderGrant`, `responderMove`, etc.) call handlers directly from props and inspect return values — `onResponderGrant` returning `true` blocks native responder, `onResponderTerminationRequest` returning `false` refuses termination. This eliminates all commit-time cost for responder events (no wrappers, no addEventListener, no `responderWrappers` on canonical). ## How did you test this change? Flow Tested e2e in RN using Fantom tests (that will land after this).
99 lines
2.5 KiB
JavaScript
99 lines
2.5 KiB
JavaScript
'use strict';
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module.exports = {
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env: {
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commonjs: true,
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browser: true,
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},
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globals: {
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// ES6
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BigInt: 'readonly',
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Map: 'readonly',
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Set: 'readonly',
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Symbol: 'readonly',
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Proxy: 'readonly',
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WeakMap: 'readonly',
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WeakSet: 'readonly',
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WeakRef: 'readonly',
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Int8Array: 'readonly',
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Uint8Array: 'readonly',
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Uint8ClampedArray: 'readonly',
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Int16Array: 'readonly',
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Uint16Array: 'readonly',
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Int32Array: 'readonly',
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Uint32Array: 'readonly',
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Float32Array: 'readonly',
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Float64Array: 'readonly',
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BigInt64Array: 'readonly',
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BigUint64Array: 'readonly',
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DataView: 'readonly',
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ArrayBuffer: 'readonly',
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Reflect: 'readonly',
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globalThis: 'readonly',
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FinalizationRegistry: 'readonly',
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ScrollTimeline: 'readonly',
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navigation: 'readonly',
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// Vendor specific
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MSApp: 'readonly',
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__REACT_DEVTOOLS_GLOBAL_HOOK__: 'readonly',
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// FB
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__DEV__: 'readonly',
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// Fabric. See https://github.com/facebook/react/pull/15490
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// for more information
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nativeFabricUIManager: 'readonly',
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// RN flag to enable microtasks
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RN$enableMicrotasksInReact: 'readonly',
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RN$isNativeEventTargetEventDispatchingEnabled: 'readonly',
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// Trusted Types
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trustedTypes: 'readonly',
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// RN supports this
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setImmediate: 'readonly',
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// Scheduler profiling
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TaskController: 'readonly',
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reportError: 'readonly',
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AggregateError: 'readonly',
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// Node Feature Detection
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process: 'readonly',
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// Temp
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AsyncLocalStorage: 'readonly',
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async_hooks: 'readonly',
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// jest
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jest: 'readonly',
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// act
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IS_REACT_ACT_ENVIRONMENT: 'readonly',
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},
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parserOptions: {
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ecmaVersion: 5,
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sourceType: 'script',
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},
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rules: {
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'no-undef': 'error',
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'no-shadow-restricted-names': 'error',
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'no-restricted-syntax': [
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'error',
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// TODO: Can be removed once we upgrade GCC to a version without `optimizeArgumentsArray` optimization.
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{
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selector: 'Identifier[name=/^JSCompiler_OptimizeArgumentsArray_/]',
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message:
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'Google Closure Compiler optimized `arguments` access. ' +
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'This affects function arity. ' +
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'Create a reference to `arguments` to avoid this optimization',
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},
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],
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},
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// These plugins aren't used, but eslint complains if an eslint-ignore comment
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// references unused plugins. An alternate approach could be to strip
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// eslint-ignore comments as part of the build.
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plugins: ['ft-flow', 'jest', 'no-for-of-loops', 'react', 'react-internal'],
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};
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