Uncaught (in promise) Error:Cannot read properties of undefined(reading 'data')

这个错误可能是因为你想要访问一个未定义的变量或对象的属性。这种情况经常发生在异步代码中，因为代码尝试访问一个尚未异步执行完成的 Promise 或回调函数的结果。

要解决这个错误，你可以先确认一下你的代码的执行顺序和异步操作。确保 Promise 或回调函数已经执行完成，然后再尝试访问其结果。

你也可以在代码中加入 null 或 undefined 检查，以确保你的代码不会尝试访问未定义的变量或对象属性。

相关问题

ZSVJPCOI.js:920 Uncaught (in promise) Error: Cannot read properties of undefined (reading '_RUNTIME_') at wrappedSendMessageCallback

引用:这个错误信息表明在ZSVJPCOI.js文件的第920行发生了一个未捕获的错误，错误类型是Error，错误内容是无法读取未定义对象的属性"_RUNTIME_"。这个错误<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'data')

This error message typically appears in JavaScript when you are trying to access a property of an object or variable that is undefined or null. In this specific case, you are trying to access the 'data' property of an object that does not exist or is not defined.

To fix this error, you will need to check where the object is being created and ensure that it is properly defined before trying to access its properties. You can use conditional statements or try-catch blocks to handle cases where the object may not exist.

Here's an example of how you can use a conditional statement to avoid this error:

if (myObject && myObject.data) {
  // Access the data property of myObject
} else {
  // Handle the case where myObject or its data property is undefined
}

Alternatively, you can use a try-catch block to catch any errors that may occur when trying to access the object's properties:

try {
  const myData = myObject.data;
  // Do something with myData
} catch (error) {
  // Handle the error here
}

By using these techniques, you can prevent the 'TypeError: Cannot read properties of undefined' error from occurring in your JavaScript code.