When the error message “property navigation does not exist” is encountered, it means that the code is trying to access or use the “navigation” property, but this property does not exist or is not defined.
In programming, properties are specific characteristics or attributes of an object that can be accessed, modified or used. Objects have properties which define their state or behavior. However, if a property is not defined for an object, attempting to access or use it will result in an error.
An example of this error can be seen when working with the JavaScript Document Object Model (DOM). Suppose you have a code that tries to access the navigation property of the window object like this:
var nav = window.navigation;
In this case, if the “navigation” property does not exist or is not supported by the browser, you will get the error message “property navigation does not exist”.
To avoid this error, it is important to ensure that the property you are accessing or using is valid and available for the specific object you are working with. You can do this by checking if the property exists before using it, using techniques such as:
if (typeof object.property !== "undefined") {
// Access or use the property here
}
By checking if the property exists before using it, you can prevent the error from occurring and handle the situation accordingly.