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Ensure "addEventListener" exists on "window" for "scheduler" package #13731

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Merged
merged 4 commits into from
Sep 26, 2018
Merged

Ensure "addEventListener" exists on "window" for "scheduler" package #13731

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6553e50
Ensure addEventListener exists on "window"
trueadm Sep 26, 2018
f968b84
Update conditional as per feedback
trueadm Sep 26, 2018
1e99062
fix typo
trueadm Sep 26, 2018
c35bf9f
run prettier
trueadm Sep 26, 2018
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7 changes: 6 additions & 1 deletion packages/scheduler/src/Scheduler.js
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Original file line number Diff line number Diff line change
Expand Up @@ -468,7 +468,12 @@ var requestHostCallback;
var cancelHostCallback;
var getFrameDeadline;

if (typeof window === 'undefined') {
// "addEventListener" might not be available on the window object
// if this is a mocked "window" object. So we need to validate that too.
if (
typeof window === 'undefined' ||
typeof window.addEventListener !== 'function'
) {
// If this accidentally gets imported in a non-browser environment, fallback
// to a naive implementation.
var timeoutID = -1;
Expand Down