| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * |
| 7 | * @flow |
| 8 | */ |
| 9 | |
| 10 | import ReactSharedInternals from 'shared/ReactSharedInternals'; |
| 11 | import { |
| 12 | enableViewTransition, |
| 13 | enableGestureTransition, |
| 14 | } from 'shared/ReactFeatureFlags'; |
| 15 | import {startTransition} from './ReactStartTransition'; |
| 16 | |
| 17 | export type TransitionTypes = Array<string>; |
| 18 | |
| 19 | export function addTransitionType(type: string): void { |
| 20 | if (enableViewTransition) { |
| 21 | const transition = ReactSharedInternals.T; |
| 22 | if (transition !== null) { |
| 23 | const transitionTypes = transition.types; |
| 24 | if (transitionTypes === null) { |
| 25 | transition.types = [type]; |
| 26 | } else if (transitionTypes.indexOf(type) === -1) { |
| 27 | transitionTypes.push(type); |
| 28 | } |
| 29 | } else { |
| 30 | // We're in the async gap. Simulate an implicit startTransition around it. |
| 31 | if (__DEV__) { |
| 32 | if (ReactSharedInternals.asyncTransitions === 0) { |
| 33 | if (enableGestureTransition) { |
| 34 | console.error( |
| 35 | 'addTransitionType can only be called inside a `startTransition()` ' + |
| 36 | 'or `startGestureTransition()` callback. ' + |
| 37 | 'It must be associated with a specific Transition.', |
| 38 | ); |
| 39 | } else { |
| 40 | console.error( |
| 41 | 'addTransitionType can only be called inside a `startTransition()` ' + |
| 42 | 'callback. It must be associated with a specific Transition.', |
| 43 | ); |
| 44 | } |
| 45 | } |
| 46 | } |
| 47 | startTransition(addTransitionType.bind(null, type)); |
| 48 | } |
| 49 | } |
| 50 | } |