mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Xuan Huang
06388891a3
Summary: Changelog: [Internal] This diff only extracted the `isNativeFunction` used in `setUpTimers` into the `FeatureDetection` utility, but later we will add more functions in it and reuse them in other places. Reviewed By: RSNara Differential Revision: D29986750 fbshipit-source-id: 6e48e38d92ceccb35eead3c52e00e1eecb81b5b0
94 lines
2.8 KiB
JavaScript
94 lines
2.8 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow strict-local
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* @format
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*/
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'use strict';
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const {polyfillGlobal} = require('../Utilities/PolyfillFunctions');
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const {isNativeFunction} = require('../Utilities/FeatureDetection');
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if (__DEV__) {
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if (typeof global.Promise !== 'function') {
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console.error('Promise should exist before setting up timers.');
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}
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}
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// Currently, Hermes `Promise` is implemented via Internal Bytecode.
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const hasHermesPromiseQueuedToJSVM =
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global?.HermesInternal?.hasPromise?.() &&
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global?.HermesInternal?.useEngineQueue?.();
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const hasNativePromise = isNativeFunction(Promise);
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const hasPromiseQueuedToJSVM = hasNativePromise || hasHermesPromiseQueuedToJSVM;
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// In bridgeless mode, timers are host functions installed from cpp.
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if (!global.RN$Bridgeless) {
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/**
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* Set up timers.
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* You can use this module directly, or just require InitializeCore.
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*/
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const defineLazyTimer = name => {
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polyfillGlobal(name, () => require('./Timers/JSTimers')[name]);
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};
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defineLazyTimer('setTimeout');
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defineLazyTimer('clearTimeout');
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defineLazyTimer('setInterval');
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defineLazyTimer('clearInterval');
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defineLazyTimer('requestAnimationFrame');
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defineLazyTimer('cancelAnimationFrame');
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defineLazyTimer('requestIdleCallback');
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defineLazyTimer('cancelIdleCallback');
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}
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/**
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* Set up immediate APIs, which is required to use the same microtask queue
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* as the Promise.
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*/
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if (hasPromiseQueuedToJSVM) {
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// When promise queues to the JSVM microtasks queue, we shim the immedaite
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// APIs via `queueMicrotask` to maintain the backward compatibility.
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polyfillGlobal(
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'setImmediate',
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() => require('./Timers/immediateShim').setImmediate,
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);
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polyfillGlobal(
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'clearImmediate',
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() => require('./Timers/immediateShim').clearImmediate,
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);
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} else {
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// When promise was polyfilled hence is queued to the RN microtask queue,
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// we polyfill the immediate APIs as aliases to the ReactNativeMicrotask APIs.
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// Note that in bridgeless mode, immediate APIs are installed from cpp.
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if (!global.RN$Bridgeless) {
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polyfillGlobal(
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'setImmediate',
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() => require('./Timers/JSTimers').queueReactNativeMicrotask,
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);
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polyfillGlobal(
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'clearImmediate',
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() => require('./Timers/JSTimers').clearReactNativeMicrotask,
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);
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}
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}
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/**
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* Set up the microtask queueing API, which is required to use the same
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* microtask queue as the Promise.
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*/
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if (hasHermesPromiseQueuedToJSVM) {
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// Fast path for Hermes.
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polyfillGlobal('queueMicrotask', () => global.HermesInternal.enqueueJob);
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} else {
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// Polyfill it with promise (regardless it's polyfiled or native) otherwise.
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polyfillGlobal(
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'queueMicrotask',
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() => require('./Timers/queueMicrotask.js').default,
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);
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}
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