TypeError: Cannot read property 'canDeactivate' of null in IONIC 5 refers to an error that occurs when trying to access the 'canDeactivate' property of a null object.
In IONIC 5, the 'canDeactivate' property is used to determine if a component can be deactivated or not. It is commonly used in navigation guards to prevent users from leaving a page or component under certain conditions.
The error message suggests that the object on which the 'canDeactivate' property is being accessed is null, meaning it does not exist or has not been initialized properly. This can happen if the object is not assigned a value or if it is explicitly set to null.
To resolve this error, you need to ensure that the object is properly initialized before accessing its properties. Here are a few steps you can take to troubleshoot and fix the issue:
Example:
if (myObject?.canDeactivate) {
// Perform actions if the object is not null and has the 'canDeactivate' property
} else {
// Handle the case when the object is null or does not have the 'canDeactivate' property
}
Remember to replace 'myObject' with the actual variable or object name in your code.
It's important to note that the provided solution is generic and may not be specific to IONIC 5. The error message and troubleshooting steps can be applied to similar scenarios in other frameworks or programming languages.
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