🔴 forms and signal

Information

We are working within a large e-commerce codebase that utilizes a substantial number of forms. The team predominantly uses reactive forms, and since the release of signals, we have been integrating them extensively.

The current feature in development is a multi-step form process. The steps include: selecting a product, choosing the quantity, and finally proceeding to the checkout step to complete the billing details. However, an issue has been identified: when a user navigates back from the checkout step to the quantity step, the previously selected quantity is not retained. This needs to be fixed.

Challenge Statement

The objective of this challenge is to make sure that the selected quantity is preserved when navigating back from the checkout step to the quantity step.

Constraints

The solution must use reactive forms and signals.

Additionally, as an optional side challenge, you may refactor the code to use template-driven forms.