Pro Angular 16

22 Using the forms API, part 2

This chapter covers

• Creating form components dynamically
• Validating dynamically created form components
• Using the asynchronous validation features
• Writing custom form validators.

In this chapter, I continue to describe the Angular forms API, explaining how to create form controls dynamically and how to create custom validation. Table 22.1 summarizes the chapter.

Table 22.1. Chapter summary

Problem	Solution	Listing
Creating and managing form controls dynamically	Use a FormArray object	1–7
Validating dynamically created form controls	Use a control’s position in its enclosing FormArray as identification during the validation process	8, 9
Altering the values produced ...