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Fix crash during server render in react 16.4.1. #13088

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Merged
merged 5 commits into from
Jun 22, 2018
Merged

Fix crash during server render in react 16.4.1. #13088

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a2cd55a
Fix crash during server render.
Jun 21, 2018
d29667a
Fix flow errors and log warning if setTimeout / clearTimeout are
Jun 21, 2018
98afa72
Use invariant to assert setTimeout / clearTimeout are functions
Jun 21, 2018
ffd89fd
Remove use of invariant
Jun 22, 2018
96881ff
Explain
gaearon Jun 22, 2018
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11 changes: 9 additions & 2 deletions packages/react-scheduler/src/ReactScheduler.js
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Original file line number Diff line number Diff line change
Expand Up @@ -60,8 +60,15 @@ if (__DEV__) {
// this module is initially evaluated.
// We want to be using a consistent implementation.
const localDate = Date;
const localSetTimeout = setTimeout;
const localClearTimeout = clearTimeout;

// This initialization code may run even on server environments
// if a component just imports ReactDOM (e.g. for findDOMNode).
// Some environments might not have setTimeout or clearTimeout.
// https://github.com/facebook/react/pull/13088
const localSetTimeout =
typeof setTimeout === 'function' ? setTimeout : (undefined: any);
const localClearTimeout =
typeof clearTimeout === 'function' ? clearTimeout : (undefined: any);

const hasNativePerformanceNow =
typeof performance === 'object' && typeof performance.now === 'function';
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