In which lifecycle phase would you initialize properties and variables?

The lifecycle phase during which properties and variables are initialized is the OnInitialize phase. This phase is specifically designed for setting up initial values and preparing the state of variables before any interaction takes place with the component.

When a component is created, OnInitialize is called first, making it ideal for establishing the necessary context for the component. During this phase, you can define default values and execute any setup logic that is essential for the component's functionality. It ensures that everything is ready before the component begins to process user inputs or any other logic.

This phase occurs only once during the component's lifecycle, which makes it a critical point for initialization, rather than being re-invoked when properties change or when the component is destroyed. Thus, using OnInitialize for this purpose aligns with best practices in component design and lifecycle management.