Cannot read properties of undefined (reading 'confirm')
时间: 2023-08-17 10:11:26 浏览: 238
js实现自定义confirm
The error message "Cannot read properties of undefined (reading 'confirm')" typically occurs when you are trying to access the `confirm` property of an undefined or null value.
To resolve this issue, you should ensure that the object or variable you are trying to access the `confirm` property from is defined and not null before accessing it. Here are a few steps you can follow to troubleshoot and fix this error:
1. Check if the object or variable is defined: Before accessing any property, make sure the object or variable is defined and not null. You can use conditional statements like `if` or nullish coalescing operator `?.` to handle cases where the object may be undefined or null.
```javascript
if (myObject && myObject.confirm) {
// Access the confirm property
}
```
or
```javascript
const confirmation = myObject?.confirm;
```
2. Verify the object structure: Double-check the structure of the object and ensure that it has the expected property. Make sure that the object has been initialized correctly and that the property you are trying to access is present.
3. Debugging: If the above steps do not resolve the issue, you can use console.log statements or a debugger to trace the flow of your code and identify where the object is becoming undefined.
By following these steps, you should be able to resolve the "Cannot read properties of undefined (reading 'confirm')" error.
阅读全文