node.js - 了解 Node ReferenceError转储

Question

试图通过了解错误转储更好地了解如何进行调试。例如，我有如下引用错误:

ReferenceError: Can't find variable: title

This error is located at:
    in TimerForm (at ToggleTimerForm.js:44)
    in RCTView (at View.js:60)
    in View (at ToggleTimerForm.js:42)
    in ToggleableTimerForm (at App.js:54)
    in RCTView (at View.js:60)
    in View (at ScrollView.js:791)
    in RCTScrollView (at ScrollView.js:887)
    in ScrollView (at App.js:53)
    in RCTView (at View.js:60)
    in View (at App.js:47)
    in App (at registerRootComponent.js:35)
    in RootErrorBoundary (at registerRootComponent.js:34)
    in ExpoRootComponent (at renderApplication.js:33)
    in RCTView (at View.js:60)
    in View (at AppContainer.js:102)
    in RCTView (at View.js:60)
    in View (at AppContainer.js:122)
    in AppContainer (at renderApplication.js:32)

* components/TimerForm.js:54:6 in render
- node_modules/react-proxy/modules/createPrototypeProxy.js:44:35 in proxiedMethod
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:8811:23 in finishClassComponent
- ... 17 more stack frames from framework internals

本能地，我首先看到的是TimerForm，但是随后我看到ToggleTimerForm.js也被列出。 “在”是什么意思，“在”是什么意思？另外，为什么列出了这么多文件？它们在此错误转储中的意义是什么？

希望更好地了解所有工作原理!

Answer 1

基本上，这只是一个call stack，一个相互调用的函数链。通常，您希望查看最新的错误信息，但是通常您可能需要向上几个层次了解逻辑。

请注意，根据框架的不同，调用堆栈可能以不同的方式显示。在这种情况下，您看到的是react调用堆栈，而不是普通的node.js。