Cannot read property 'replaceChild' of null
最近用react做百度一张图，但出现这种错误
【Cannot read property 'replaceChild' of null】VM4845 index.js:6481 Uncaught (in promise) TypeError: Cannot read property 'replaceChild' of null
at Function.replaceChildWithTree (VM4845 index.js:6481)
at Object.dangerouslyReplaceNodeWithMarkup (VM4845 index.js:45907)
at Object.dangerouslyReplaceNodeWithMarkup [as replaceNodeWithMarkup] (VM4845 index.js:11462)
at ReactCompositeComponentWrapper._replaceNodeWithMarkup (VM4845 index.js:50045)
at ReactCompositeComponentWrapper._updateRenderedComponent (VM4845 index.js:50035)
at ReactCompositeComponentWrapper._performComponentUpdate (VM4845 index.js:49985)
at ReactCompositeComponentWrapper.updateComponent (VM4845 index.js:49906)
at ReactCompositeComponentWrapper.performUpdateIfNecessary (VM4845 index.js:49822)
at Object.performUpdateIfNecessary (VM4845 index.js:6394)
at runBatchedUpdates (VM4845 index.js:2656)
at ReactReconcileTransaction.perform (VM4845 index.js:8844)
at ReactUpdatesFlushTransaction.perform (VM4845 index.js:8844)
at ReactUpdatesFlushTransaction.perform (VM4845 index.js:2595)
at Object.flushBatchedUpdates (VM4845 index.js:2678)
at ReactDefaultBatchingStrategyTransaction.closeAll (VM4845 index.js:8910)
at ReactDefaultBatchingStrategyTransaction.perform (VM4845 index.js:8857)
at Object.batchedUpdates (VM4845 index.js:51179)
at Object.enqueueUpdate (VM4845 index.js:2706)
at enqueueUpdate (VM4845 index.js:12055)
at Object.enqueueSetState (VM4845 index.js:12249)
at DynamicComponent.ReactComponent.setState (VM4845 index.js:14866)
at VM4845 index.js:54633
各种搜，各种检查，还是一直报错，后来在做另一个项目的时候发现，是因为在public中的index.html中引用了一个不存在的js文件。。。。
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