mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Xuan Huang
e60ad0837e
Summary: Changelog: [Internal] This diff add types to some of the common globals so uses of them through `global` are now typed. All the globals are marked as read-only for their intented uses. However, some of them do have write cites (mostly are in tests to deliberately set up a special test environment). Those write cites are considered as "necessary evil" and annotated as `FlowFixMe`. Reviewed By: yungsters Differential Revision: D30158145 fbshipit-source-id: 93a99063361a4b7a1e33d9fc97a661be30a4d8f9
94 lines
2.9 KiB
JavaScript
94 lines
2.9 KiB
JavaScript
/**
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
* @flow strict-local
|
|
* @format
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
const {polyfillGlobal} = require('../Utilities/PolyfillFunctions');
|
|
const {isNativeFunction} = require('../Utilities/FeatureDetection');
|
|
|
|
if (__DEV__) {
|
|
if (typeof global.Promise !== 'function') {
|
|
console.error('Promise should exist before setting up timers.');
|
|
}
|
|
}
|
|
|
|
// Currently, Hermes `Promise` is implemented via Internal Bytecode.
|
|
const hasHermesPromiseQueuedToJSVM =
|
|
global.HermesInternal?.hasPromise?.() === true &&
|
|
global.HermesInternal?.useEngineQueue?.() === true;
|
|
|
|
const hasNativePromise = isNativeFunction(Promise);
|
|
const hasPromiseQueuedToJSVM = hasNativePromise || hasHermesPromiseQueuedToJSVM;
|
|
|
|
// In bridgeless mode, timers are host functions installed from cpp.
|
|
if (global.RN$Bridgeless !== true) {
|
|
/**
|
|
* Set up timers.
|
|
* You can use this module directly, or just require InitializeCore.
|
|
*/
|
|
const defineLazyTimer = name => {
|
|
polyfillGlobal(name, () => require('./Timers/JSTimers')[name]);
|
|
};
|
|
defineLazyTimer('setTimeout');
|
|
defineLazyTimer('clearTimeout');
|
|
defineLazyTimer('setInterval');
|
|
defineLazyTimer('clearInterval');
|
|
defineLazyTimer('requestAnimationFrame');
|
|
defineLazyTimer('cancelAnimationFrame');
|
|
defineLazyTimer('requestIdleCallback');
|
|
defineLazyTimer('cancelIdleCallback');
|
|
}
|
|
|
|
/**
|
|
* Set up immediate APIs, which is required to use the same microtask queue
|
|
* as the Promise.
|
|
*/
|
|
if (hasPromiseQueuedToJSVM) {
|
|
// When promise queues to the JSVM microtasks queue, we shim the immedaite
|
|
// APIs via `queueMicrotask` to maintain the backward compatibility.
|
|
polyfillGlobal(
|
|
'setImmediate',
|
|
() => require('./Timers/immediateShim').setImmediate,
|
|
);
|
|
polyfillGlobal(
|
|
'clearImmediate',
|
|
() => require('./Timers/immediateShim').clearImmediate,
|
|
);
|
|
} else {
|
|
// When promise was polyfilled hence is queued to the RN microtask queue,
|
|
// we polyfill the immediate APIs as aliases to the ReactNativeMicrotask APIs.
|
|
// Note that in bridgeless mode, immediate APIs are installed from cpp.
|
|
if (global.RN$Bridgeless !== true) {
|
|
polyfillGlobal(
|
|
'setImmediate',
|
|
() => require('./Timers/JSTimers').queueReactNativeMicrotask,
|
|
);
|
|
polyfillGlobal(
|
|
'clearImmediate',
|
|
() => require('./Timers/JSTimers').clearReactNativeMicrotask,
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set up the microtask queueing API, which is required to use the same
|
|
* microtask queue as the Promise.
|
|
*/
|
|
if (hasHermesPromiseQueuedToJSVM) {
|
|
// Fast path for Hermes.
|
|
polyfillGlobal('queueMicrotask', () => global.HermesInternal?.enqueueJob);
|
|
} else {
|
|
// Polyfill it with promise (regardless it's polyfiled or native) otherwise.
|
|
polyfillGlobal(
|
|
'queueMicrotask',
|
|
() => require('./Timers/queueMicrotask.js').default,
|
|
);
|
|
}
|