(finishedWork: Fiber, current: Fiber)
| 632 | } |
| 633 | |
| 634 | export function commitClassSnapshot(finishedWork: Fiber, current: Fiber) { |
| 635 | const prevProps = current.memoizedProps; |
| 636 | const prevState = current.memoizedState; |
| 637 | const instance = finishedWork.stateNode; |
| 638 | // We could update instance props and state here, |
| 639 | // but instead we rely on them being set during last render. |
| 640 | // TODO: revisit this when we implement resuming. |
| 641 | if (__DEV__) { |
| 642 | if ( |
| 643 | !finishedWork.type.defaultProps && |
| 644 | !('ref' in finishedWork.memoizedProps) && |
| 645 | !didWarnAboutReassigningProps |
| 646 | ) { |
| 647 | if (instance.props !== finishedWork.memoizedProps) { |
| 648 | console.error( |
| 649 | 'Expected %s props to match memoized props before ' + |
| 650 | 'getSnapshotBeforeUpdate. ' + |
| 651 | 'This might either be because of a bug in React, or because ' + |
| 652 | 'a component reassigns its own `this.props`. ' + |
| 653 | 'Please file an issue.', |
| 654 | getComponentNameFromFiber(finishedWork) || 'instance', |
| 655 | ); |
| 656 | } |
| 657 | if (instance.state !== finishedWork.memoizedState) { |
| 658 | console.error( |
| 659 | 'Expected %s state to match memoized state before ' + |
| 660 | 'getSnapshotBeforeUpdate. ' + |
| 661 | 'This might either be because of a bug in React, or because ' + |
| 662 | 'a component reassigns its own `this.state`. ' + |
| 663 | 'Please file an issue.', |
| 664 | getComponentNameFromFiber(finishedWork) || 'instance', |
| 665 | ); |
| 666 | } |
| 667 | } |
| 668 | } |
| 669 | try { |
| 670 | const resolvedPrevProps = resolveClassComponentProps( |
| 671 | finishedWork.type, |
| 672 | prevProps, |
| 673 | ); |
| 674 | let snapshot; |
| 675 | if (__DEV__) { |
| 676 | snapshot = runWithFiberInDEV( |
| 677 | finishedWork, |
| 678 | callGetSnapshotBeforeUpdates, |
| 679 | instance, |
| 680 | resolvedPrevProps, |
| 681 | prevState, |
| 682 | ); |
| 683 | const didWarnSet = |
| 684 | ((didWarnAboutUndefinedSnapshotBeforeUpdate: any): Set<mixed>); |
| 685 | if (snapshot === undefined && !didWarnSet.has(finishedWork.type)) { |
| 686 | didWarnSet.add(finishedWork.type); |
| 687 | runWithFiberInDEV(finishedWork, () => { |
| 688 | console.error( |
| 689 | '%s.getSnapshotBeforeUpdate(): A snapshot value (or null) ' + |
| 690 | 'must be returned. You have returned undefined.', |
| 691 | getComponentNameFromFiber(finishedWork), |
no test coverage detected