Angular Formly - Help & Documentation

🚀 What is Angular Formly?

Angular Formly is a dynamic JSON powered form library for Angular that brings unparalleled maintainability to your application's forms. It allows you to build complex forms with minimal code by defining your form structure using JSON configuration.

🎯 Dynamic Forms

Create forms dynamically from JSON configuration without writing template code

🔧 Highly Configurable

Customize field types, validation rules, and styling to match your needs

📱 Responsive Design

Built-in responsive support for all device sizes

🎨 Multiple UI Libraries

Support for Bootstrap, Material Design, and custom themes

📦 Installation

Step 1: Install Angular Formly

npm install @ngx-formly/core @ngx-formly/bootstrap

Step 2: Import in your module

import { FormlyModule } from '@ngx-formly/core';
import { FormlyBootstrapModule } from '@ngx-formly/bootstrap';

@NgModule({
  imports: [
    ReactiveFormsModule,
    FormlyModule.forRoot(),
    FormlyBootstrapModule
  ]
})
export class AppModule { }

🔰 Basic Usage

Component Setup

import { Component } from '@angular/core'; import { FormGroup } from '@angular/forms'; import { FormlyFormOptions, FormlyFieldConfig } from '@ngx-formly/core'; @Component({ selector: 'app-example', template: ` <form [formGroup]="form" (ngSubmit)="onSubmit(model)"> <formly-form [form]="form" [fields]="fields" [model]="model"></formly-form> <button type="submit" class="btn btn-primary">Submit</button> </form> ` }) export class AppComponent { form = new FormGroup({}); model = { email: '[email protected]' }; fields: FormlyFieldConfig[] = [ { key: 'email', type: 'input', templateOptions: { label: 'Email address', placeholder: 'Enter email', required: true, } } ]; onSubmit(model: any) { console.log(model); } }

🎛️ Field Types

Angular Formly supports various field types out of the box:

Input Fields

Text, email, password, number, tel, url

Selection Fields

Select dropdown, radio buttons, checkboxes

Text Areas

Multi-line text input for longer content

Custom Fields

Create your own field types for specific needs

📝 Interactive Example

Here's a working example of a form built with Angular Formly configuration:

First Name *

Email Address *

Age

Country

Message

✅ Validation

Built-in Validators

fields: FormlyFieldConfig[] = [
  {
    key: 'email',
    type: 'input',
    templateOptions: {
      label: 'Email',
      required: true,
    },
    validators: {
      validation: ['email'],
    },
  },
  {
    key: 'password',
    type: 'input',
    templateOptions: {
      label: 'Password',
      type: 'password',
      minLength: 6,
      required: true,
    }
  }
];

Custom Validators

export function EmailValidator(control: AbstractControl): ValidationErrors | null {
  return /\S+@\S+\.\S+/.test(control.value) ? null : { 'email': true };
}

// Register validator
FormlyModule.forRoot({
  validators: [
    { name: 'email', validation: EmailValidator },
  ],
})

🔧 Troubleshooting

Common Issues

Form Not Displaying

Make sure you've imported ReactiveFormsModule and FormlyModule in your app module

Validation Not Working

Check that your field configuration includes proper validation rules and error messages

Styling Issues

Ensure you've imported the correct UI library (Bootstrap, Material, etc.)

Model Binding Problems

Verify that your model object keys match the field keys in your configuration

📚 Additional Resources

For more comprehensive documentation and examples:

🌐 Official Documentation: formly.dev
📖 GitHub Repository: github.com/ngx-formly/ngx-formly
💬 Community Forum: Join the discussions on GitHub Issues
🎥 Video Tutorials: Available on YouTube and other platforms
📦 NPM Package: npmjs.com/package/@ngx-formly/core

Angular Formly Help Center