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onSrolll: null is not an object (evaluating 'P.current.classList') #81

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johnsonsu opened this issue May 24, 2023 · 0 comments · May be fixed by #82
Open

onSrolll: null is not an object (evaluating 'P.current.classList') #81

johnsonsu opened this issue May 24, 2023 · 0 comments · May be fixed by #82

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@johnsonsu
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johnsonsu commented May 24, 2023 •
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The following line is throwing an error due to containerRef.current being null.

react-simple-pull-to-refresh/build/index.esm.js in onScroll at line 258:26

/**
 * Check if user breached fetchMoreThreshold
 */
    if (canFetchMore && getScrollToBottomValue() < fetchMoreThreshold && onFetchMore) {
            fetchMoreTresholdBreached = true;
            containerRef.current.classList.add('ptr--fetch-more-treshold-breached'); <---- This line is throwing the error
            onFetchMore().then(initContainer).catch(initContainer);
        }
    };

This can be triggered by the component getting unmounted during a scroll event.
@johnsonsu johnsonsu changed the title onSrolll null is not an object (evaluating 'P.current.classList') onSrolll: null is not an object (evaluating 'P.current.classList') May 24, 2023
@johnsonsu johnsonsu linked a pull request May 24, 2023 that will close this issue
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Use optional chaining instead of non-null assert johnsonsu/react-simple-pull-to-refresh
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