Angular Reactive Forms
Angular Reactive Forms
A comprehensive guide for building forms with Angular
About the Book
This book is a comprehensive guide to Angular's Reactive Forms module. It covers everything you need to know in order to design, build, and manage complex, dynamic form systems. Each method is explained in detail, along with a code sample and notes. The real-world usage section contains recipes for common scenarios that can be used as a complete solution, a code reference, or a starting point for your own implementation. The final section is dedicated to more advanced usage.
About the Author
About the Contributors
Table of Contents
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- What this book is all about
- How to use this book
- Prior knowledge and experience
- Setting up a development environment
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Part 1. API Guide
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The Building Blocks
- ReactiveFormModule
- FormControl
- FormControlDirective
- Getting the value
- Tracking control value changes
- Setting the control’s value
- Resetting the Control’s Value
- Creating a FormGroup
- Setting and resetting the FormGroup’s value
- Retrieving child controls
- Retrieving the root control
- Mutating the control group
- Creating a FormArray
- Working with the FormArray
- FormArray values
- Mutating the FormArray controls
- Using FormBuilder to reduce Code
- Summary
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Tracking Control State
- Control state properties
- Displaying a validation message
- Tracking the Group’s state
- Styling form controls
- Setting the state manually
- Resetting a control’s state
- Summary
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Validation
- Building a login form
- Built-in validators
- Tracking validation status
- Custom validators
- Working with the errors Map
- Managing the errors object manually
- Checking for an Error
- Async validators
- Passing arguments to a custom validator
- Tracking validation status
- Reactive status changes
- Using native validation
- Disabling and enabling validation of a control
- Controlling the side effects
- Preventing the status change event
- Reacting to disabled events
- Managing validators manually
- Summary
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The Building Blocks
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Part 2. Forms Cookbook
- Nested forms
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Part 3. Advanced Forms
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Custom Form Controls
- The ControlValueAccessor Interface
- ControlValueAccessor Directives
- Sample Custom Form Control: Button Group
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Custom Form Control Validation
- The Slider Custom Control
- Adding Custom Validation
- Passing Arguments to a Built-in Validator
- Extracting the Validator Function
- Custom Validator Directive
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Dynamic Forms
- Dynamic Control Component
- Dynamic Form Renderer Component
- Using the Dynamic Form Renderer
- Summary
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State Driven Forms With Redux
- Redux And Angular
- Building a State Driven Form
- Connecting a Form Component
- Summary
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Custom Form Controls
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