Jaimin Bhavsar

Jaimin Bhavsar

1576297117

How to create Angular 9 Form with Template Driven Form using Bootstrap

To validate the form, we will also look at how to use Bootstrap UI library to facilitate our form validation task. In this Angular form example, we will create a basic form with some Input fields, such as name, email, password and hobbies.

By the end of this tutorial, you will understand following things:

  • How to quickly validate a form with template-driven approach in Angular 9.
  • How to create a form with Bootstrap form template.
  • How to bind ngModel directive with input controls to set the properties on the component.
  • How to submit the form with template driven approach.

Table of Contents

  • Setting Up Angular Project
  • Importing FormsModule
  • Create Form with Bootstrap From Template
  • Implement Template-driven Form in Angular
  • Adding Validation in Template-driven Form
  • Conclusion

Setting Up Angular Project

Run the below command to generate a brand new Angular 9 project using Angular CLI.

ng new angular-template-driven-form

Head over to the Angular form project.

cd angular-template-driven-form

Install Bootstrap in Angular 9

Install Bootstrap UI framework via NPM using following command.

npm install bootstrap

Add the Bootstrap CSS path in styles array inside the angular.json file.

"styles": [
    "src/styles.css",
    "node_modules/bootstrap/dist/css/bootstrap.min.css"
]

Now we have configured Angular and Bootstrap, run the command to open the app in the browser.

ng serve --open

Importing FormsModule

To get started with Form control and NgModel Angular Forms service, we require to import FormsModule in app.module.ts file.

// app/app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { FormsModule } from '@angular/forms';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})

export class AppModule { }

Create Form with Bootstrap From Template

Create a simple form in Angular using Bootstrap form component, open the app.component.html file and replace existing code with the following code.

<form novalidate>
  <div class="form-group">
    <label>Name</label>
    <input type="text" class="form-control">
  </div>

  <div class="form-group">
    <label>Email</label>
    <input type="email" class="form-control">
  </div>

  <div class="form-group">
    <label>Password</label>
    <input type="password" class="form-control">
  </div>

  <div class="form-group">
    <label>Hobbies</label>
    <select class="form-control">
      <option value="">Select an option</option>
      <option *ngFor="let hoby of Hobbies" [value]="hoby">
        {{hoby}}
      </option>
    </select>
  </div>

  <div class="form-group">
    <button class="btn btn-danger btn-block">Submit</button>
  </div>
</form>

Also, add the following options array for select drop-down input field in the app.component.ts file.

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})

export class AppComponent {
  Hobbies: string[] = [
    'Acrobatics',
    'Acting',
    'Animation',
    'Astronomy',
    'Baking'
  ];
}

Implement Template-driven Form in Angular

Now we will add the template-driven form using ngModel directive in Angular component. Add the following code in the app.component.html file to initialize the Angular 9 template-driven form.

<form #userForm="ngForm" (ngSubmit)="onSubmit(userForm)">
  <div class="form-group">
    <label>Name</label>
    <input type="text" name="name" class="form-control" [(ngModel)]="model.name" required>
  </div>

  <div class="form-group">
    <label>Email</label>
    <input type="email" class="form-control" name="email" [(ngModel)]="model.email" required>
  </div>

  <div class="form-group">
    <label>Password</label>
    <input type="password" class="form-control" name="password" [(ngModel)]="model.password" required>
  </div>

  <div class="form-group">
    <label>Hobbies</label>
    <select class="form-control" name="hobbies" [(ngModel)]="hobbies">
      <option value="">Select an option</option>
      <option *ngFor="let hoby of Hobbies" [value]="hoby">
        {{hoby}}
      </option>
    </select>
  </div>

  <div class="form-group">
    <button class="btn btn-danger btn-block">Submit</button>
  </div>
</form>

To initiate the template-driven form, add a reference to the NgForm. Declare a template variable with the form by adding the #userForm="ngForm".

To submit the form add onSubmit(userForm) event on the form tag. When a user clicks on the submit button, then the input value will be passed through the onSubmit() method.

We also need to add a name property to the Angular 9 form To register the form control in the form, and it is required to be added.

The ngModel directive formulates a FormControl instance in the Angular form and attaches it with the form control item.

From the hobbies option, a user can select one hoby, add a select field to the form and define the options as Hobbies using *ngFor directive. The ngFor directive will iterate over Hobbies array and create the option tag for every option described in the array.

Open the app.component.ts file and add the following code.

import { Component } from '@angular/core';

export class User {
  public name: string;
  public email: string;
  public password: string;
  public hobbies: string;
}

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})

export class AppComponent {
  model = new User();

  Hobbies: string[] = [
    'Acrobatics',
    'Acting',
    'Animation',
    'Astronomy',
    'Baking'
  ];

  constructor() { }

  onSubmit(form) {
    console.log(form.value)
  }
}

Define a property class for the form model; it carries the form field’s value and set the model instance with User Class.

Adding Validation in Template-driven Form

Our Angular form is working correctly, but we have to add validation in our form and convey a strong message to the user if the form fields are invalid.

<form #userForm="ngForm" (ngSubmit)="userForm.form.valid && onSubmit(userForm)">
  <div class="form-group">
    <label>Name</label>
    <input type="text" name="name" class="form-control" [(ngModel)]="model.name" #name="ngModel"
      [ngClass]="{ 'is-invalid': userForm.submitted && name.invalid }" required>
    <div class="invalid-feedback" *ngIf="userForm.submitted && name.invalid">
      <p *ngIf="name.errors.required">Name is required</p>
    </div>
  </div>
</form>

We add the required validation in the name field, to access the form control inside the template. We created the name variable and assigned to “ngModel”.

To add the Bootstrap form validation, we implemented the validation to the class. Class validation applies only when the user submits the form and form is invalid.

To show the error message we used the Angular *ngIf directive and checking the input condition on submission and if the form is invalid.

Same way we applied the form validation in other input fields. Open the app.component.html file and add the following code.

<form #userForm="ngForm" (ngSubmit)="userForm.form.valid && onSubmit(userForm)">
  <div class="form-group">
    <label>Name</label>
    <input type="text" name="name" class="form-control" [(ngModel)]="model.name" #name="ngModel"
      [ngClass]="{ 'is-invalid': userForm.submitted && name.invalid }" required>
    <div class="invalid-feedback" *ngIf="userForm.submitted && name.invalid">
      <p *ngIf="name.errors.required">Name is required</p>
    </div>
  </div>

  <div class="form-group">
    <label>Email</label>
    <input type="email" class="form-control" name="email" [(ngModel)]="model.email" #email="ngModel"
      [ngClass]="{ 'is-invalid': userForm.submitted && email.invalid }" email required>
    <div *ngIf="userForm.submitted && email.invalid" class="invalid-feedback">
      <div *ngIf="email.errors.required">Email is required</div>
      <div *ngIf="email.errors.email">Must be a valid email address</div>
    </div>
  </div>

  <div class="form-group">
    <label>Password</label>
    <input type="password" class="form-control" name="password" [(ngModel)]="model.password" #password="ngModel"
      [ngClass]="{ 'is-invalid': userForm.submitted && password.invalid }" minlength="8" required>
    <div *ngIf="userForm.submitted && password.invalid" class="invalid-feedback">
      <div *ngIf="password.errors.required">Password is required</div>
      <div *ngIf="password.errors.minlength">Password should be at least 8 characters long</div>
    </div>
  </div>

  <div class="form-group">
    <label>Hobbies</label>
    <select class="form-control" name="hobbies" [(ngModel)]="hobbies">
      <option value="">Select an option</option>
      <option *ngFor="let hoby of Hobbies" [value]="hoby">
        {{hoby}}
      </option>
    </select>
  </div>

  <div class="form-group">
    <button class="btn btn-danger btn-block">Submit</button>
  </div>
</form>

Conclusion

Finally, we have completed the Angular 9 Forms tutorial, and In this tutorial, we learned how to create Angular form with the template-driven approach.

We learnt how to implement Bootstrap in Angular and create forms with Bootstrap.

We looked at how to work with the ngModel directive to handle the Angular form data.

We looked at how to add validation in template-driven forms as well as how to submit a form.

To get the full code of this tutorial visit this GitHub repository.

Thanks a lot for reading this tutorial.

#Angular #Bootstrap #WebDev #JavaScript

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How to create Angular 9 Form with Template Driven Form using Bootstrap
Easter  Deckow

Easter Deckow

1655630160

PyTumblr: A Python Tumblr API v2 Client

PyTumblr

Installation

Install via pip:

$ pip install pytumblr

Install from source:

$ git clone https://github.com/tumblr/pytumblr.git
$ cd pytumblr
$ python setup.py install

Usage

Create a client

A pytumblr.TumblrRestClient is the object you'll make all of your calls to the Tumblr API through. Creating one is this easy:

client = pytumblr.TumblrRestClient(
    '<consumer_key>',
    '<consumer_secret>',
    '<oauth_token>',
    '<oauth_secret>',
)

client.info() # Grabs the current user information

Two easy ways to get your credentials to are:

  1. The built-in interactive_console.py tool (if you already have a consumer key & secret)
  2. The Tumblr API console at https://api.tumblr.com/console
  3. Get sample login code at https://api.tumblr.com/console/calls/user/info

Supported Methods

User Methods

client.info() # get information about the authenticating user
client.dashboard() # get the dashboard for the authenticating user
client.likes() # get the likes for the authenticating user
client.following() # get the blogs followed by the authenticating user

client.follow('codingjester.tumblr.com') # follow a blog
client.unfollow('codingjester.tumblr.com') # unfollow a blog

client.like(id, reblogkey) # like a post
client.unlike(id, reblogkey) # unlike a post

Blog Methods

client.blog_info(blogName) # get information about a blog
client.posts(blogName, **params) # get posts for a blog
client.avatar(blogName) # get the avatar for a blog
client.blog_likes(blogName) # get the likes on a blog
client.followers(blogName) # get the followers of a blog
client.blog_following(blogName) # get the publicly exposed blogs that [blogName] follows
client.queue(blogName) # get the queue for a given blog
client.submission(blogName) # get the submissions for a given blog

Post Methods

Creating posts

PyTumblr lets you create all of the various types that Tumblr supports. When using these types there are a few defaults that are able to be used with any post type.

The default supported types are described below.

  • state - a string, the state of the post. Supported types are published, draft, queue, private
  • tags - a list, a list of strings that you want tagged on the post. eg: ["testing", "magic", "1"]
  • tweet - a string, the string of the customized tweet you want. eg: "Man I love my mega awesome post!"
  • date - a string, the customized GMT that you want
  • format - a string, the format that your post is in. Support types are html or markdown
  • slug - a string, the slug for the url of the post you want

We'll show examples throughout of these default examples while showcasing all the specific post types.

Creating a photo post

Creating a photo post supports a bunch of different options plus the described default options * caption - a string, the user supplied caption * link - a string, the "click-through" url for the photo * source - a string, the url for the photo you want to use (use this or the data parameter) * data - a list or string, a list of filepaths or a single file path for multipart file upload

#Creates a photo post using a source URL
client.create_photo(blogName, state="published", tags=["testing", "ok"],
                    source="https://68.media.tumblr.com/b965fbb2e501610a29d80ffb6fb3e1ad/tumblr_n55vdeTse11rn1906o1_500.jpg")

#Creates a photo post using a local filepath
client.create_photo(blogName, state="queue", tags=["testing", "ok"],
                    tweet="Woah this is an incredible sweet post [URL]",
                    data="/Users/johnb/path/to/my/image.jpg")

#Creates a photoset post using several local filepaths
client.create_photo(blogName, state="draft", tags=["jb is cool"], format="markdown",
                    data=["/Users/johnb/path/to/my/image.jpg", "/Users/johnb/Pictures/kittens.jpg"],
                    caption="## Mega sweet kittens")

Creating a text post

Creating a text post supports the same options as default and just a two other parameters * title - a string, the optional title for the post. Supports markdown or html * body - a string, the body of the of the post. Supports markdown or html

#Creating a text post
client.create_text(blogName, state="published", slug="testing-text-posts", title="Testing", body="testing1 2 3 4")

Creating a quote post

Creating a quote post supports the same options as default and two other parameter * quote - a string, the full text of the qote. Supports markdown or html * source - a string, the cited source. HTML supported

#Creating a quote post
client.create_quote(blogName, state="queue", quote="I am the Walrus", source="Ringo")

Creating a link post

  • title - a string, the title of post that you want. Supports HTML entities.
  • url - a string, the url that you want to create a link post for.
  • description - a string, the desciption of the link that you have
#Create a link post
client.create_link(blogName, title="I like to search things, you should too.", url="https://duckduckgo.com",
                   description="Search is pretty cool when a duck does it.")

Creating a chat post

Creating a chat post supports the same options as default and two other parameters * title - a string, the title of the chat post * conversation - a string, the text of the conversation/chat, with diablog labels (no html)

#Create a chat post
chat = """John: Testing can be fun!
Renee: Testing is tedious and so are you.
John: Aw.
"""
client.create_chat(blogName, title="Renee just doesn't understand.", conversation=chat, tags=["renee", "testing"])

Creating an audio post

Creating an audio post allows for all default options and a has 3 other parameters. The only thing to keep in mind while dealing with audio posts is to make sure that you use the external_url parameter or data. You cannot use both at the same time. * caption - a string, the caption for your post * external_url - a string, the url of the site that hosts the audio file * data - a string, the filepath of the audio file you want to upload to Tumblr

#Creating an audio file
client.create_audio(blogName, caption="Rock out.", data="/Users/johnb/Music/my/new/sweet/album.mp3")

#lets use soundcloud!
client.create_audio(blogName, caption="Mega rock out.", external_url="https://soundcloud.com/skrillex/sets/recess")

Creating a video post

Creating a video post allows for all default options and has three other options. Like the other post types, it has some restrictions. You cannot use the embed and data parameters at the same time. * caption - a string, the caption for your post * embed - a string, the HTML embed code for the video * data - a string, the path of the file you want to upload

#Creating an upload from YouTube
client.create_video(blogName, caption="Jon Snow. Mega ridiculous sword.",
                    embed="http://www.youtube.com/watch?v=40pUYLacrj4")

#Creating a video post from local file
client.create_video(blogName, caption="testing", data="/Users/johnb/testing/ok/blah.mov")

Editing a post

Updating a post requires you knowing what type a post you're updating. You'll be able to supply to the post any of the options given above for updates.

client.edit_post(blogName, id=post_id, type="text", title="Updated")
client.edit_post(blogName, id=post_id, type="photo", data="/Users/johnb/mega/awesome.jpg")

Reblogging a Post

Reblogging a post just requires knowing the post id and the reblog key, which is supplied in the JSON of any post object.

client.reblog(blogName, id=125356, reblog_key="reblog_key")

Deleting a post

Deleting just requires that you own the post and have the post id

client.delete_post(blogName, 123456) # Deletes your post :(

A note on tags: When passing tags, as params, please pass them as a list (not a comma-separated string):

client.create_text(blogName, tags=['hello', 'world'], ...)

Getting notes for a post

In order to get the notes for a post, you need to have the post id and the blog that it is on.

data = client.notes(blogName, id='123456')

The results include a timestamp you can use to make future calls.

data = client.notes(blogName, id='123456', before_timestamp=data["_links"]["next"]["query_params"]["before_timestamp"])

Tagged Methods

# get posts with a given tag
client.tagged(tag, **params)

Using the interactive console

This client comes with a nice interactive console to run you through the OAuth process, grab your tokens (and store them for future use).

You'll need pyyaml installed to run it, but then it's just:

$ python interactive-console.py

and away you go! Tokens are stored in ~/.tumblr and are also shared by other Tumblr API clients like the Ruby client.

Running tests

The tests (and coverage reports) are run with nose, like this:

python setup.py test

Author: tumblr
Source Code: https://github.com/tumblr/pytumblr
License: Apache-2.0 license

#python #api 

Jaimin Bhavsar

Jaimin Bhavsar

1576297117

How to create Angular 9 Form with Template Driven Form using Bootstrap

To validate the form, we will also look at how to use Bootstrap UI library to facilitate our form validation task. In this Angular form example, we will create a basic form with some Input fields, such as name, email, password and hobbies.

By the end of this tutorial, you will understand following things:

  • How to quickly validate a form with template-driven approach in Angular 9.
  • How to create a form with Bootstrap form template.
  • How to bind ngModel directive with input controls to set the properties on the component.
  • How to submit the form with template driven approach.

Table of Contents

  • Setting Up Angular Project
  • Importing FormsModule
  • Create Form with Bootstrap From Template
  • Implement Template-driven Form in Angular
  • Adding Validation in Template-driven Form
  • Conclusion

Setting Up Angular Project

Run the below command to generate a brand new Angular 9 project using Angular CLI.

ng new angular-template-driven-form

Head over to the Angular form project.

cd angular-template-driven-form

Install Bootstrap in Angular 9

Install Bootstrap UI framework via NPM using following command.

npm install bootstrap

Add the Bootstrap CSS path in styles array inside the angular.json file.

"styles": [
    "src/styles.css",
    "node_modules/bootstrap/dist/css/bootstrap.min.css"
]

Now we have configured Angular and Bootstrap, run the command to open the app in the browser.

ng serve --open

Importing FormsModule

To get started with Form control and NgModel Angular Forms service, we require to import FormsModule in app.module.ts file.

// app/app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { FormsModule } from '@angular/forms';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})

export class AppModule { }

Create Form with Bootstrap From Template

Create a simple form in Angular using Bootstrap form component, open the app.component.html file and replace existing code with the following code.

<form novalidate>
  <div class="form-group">
    <label>Name</label>
    <input type="text" class="form-control">
  </div>

  <div class="form-group">
    <label>Email</label>
    <input type="email" class="form-control">
  </div>

  <div class="form-group">
    <label>Password</label>
    <input type="password" class="form-control">
  </div>

  <div class="form-group">
    <label>Hobbies</label>
    <select class="form-control">
      <option value="">Select an option</option>
      <option *ngFor="let hoby of Hobbies" [value]="hoby">
        {{hoby}}
      </option>
    </select>
  </div>

  <div class="form-group">
    <button class="btn btn-danger btn-block">Submit</button>
  </div>
</form>

Also, add the following options array for select drop-down input field in the app.component.ts file.

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})

export class AppComponent {
  Hobbies: string[] = [
    'Acrobatics',
    'Acting',
    'Animation',
    'Astronomy',
    'Baking'
  ];
}

Implement Template-driven Form in Angular

Now we will add the template-driven form using ngModel directive in Angular component. Add the following code in the app.component.html file to initialize the Angular 9 template-driven form.

<form #userForm="ngForm" (ngSubmit)="onSubmit(userForm)">
  <div class="form-group">
    <label>Name</label>
    <input type="text" name="name" class="form-control" [(ngModel)]="model.name" required>
  </div>

  <div class="form-group">
    <label>Email</label>
    <input type="email" class="form-control" name="email" [(ngModel)]="model.email" required>
  </div>

  <div class="form-group">
    <label>Password</label>
    <input type="password" class="form-control" name="password" [(ngModel)]="model.password" required>
  </div>

  <div class="form-group">
    <label>Hobbies</label>
    <select class="form-control" name="hobbies" [(ngModel)]="hobbies">
      <option value="">Select an option</option>
      <option *ngFor="let hoby of Hobbies" [value]="hoby">
        {{hoby}}
      </option>
    </select>
  </div>

  <div class="form-group">
    <button class="btn btn-danger btn-block">Submit</button>
  </div>
</form>

To initiate the template-driven form, add a reference to the NgForm. Declare a template variable with the form by adding the #userForm="ngForm".

To submit the form add onSubmit(userForm) event on the form tag. When a user clicks on the submit button, then the input value will be passed through the onSubmit() method.

We also need to add a name property to the Angular 9 form To register the form control in the form, and it is required to be added.

The ngModel directive formulates a FormControl instance in the Angular form and attaches it with the form control item.

From the hobbies option, a user can select one hoby, add a select field to the form and define the options as Hobbies using *ngFor directive. The ngFor directive will iterate over Hobbies array and create the option tag for every option described in the array.

Open the app.component.ts file and add the following code.

import { Component } from '@angular/core';

export class User {
  public name: string;
  public email: string;
  public password: string;
  public hobbies: string;
}

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})

export class AppComponent {
  model = new User();

  Hobbies: string[] = [
    'Acrobatics',
    'Acting',
    'Animation',
    'Astronomy',
    'Baking'
  ];

  constructor() { }

  onSubmit(form) {
    console.log(form.value)
  }
}

Define a property class for the form model; it carries the form field’s value and set the model instance with User Class.

Adding Validation in Template-driven Form

Our Angular form is working correctly, but we have to add validation in our form and convey a strong message to the user if the form fields are invalid.

<form #userForm="ngForm" (ngSubmit)="userForm.form.valid && onSubmit(userForm)">
  <div class="form-group">
    <label>Name</label>
    <input type="text" name="name" class="form-control" [(ngModel)]="model.name" #name="ngModel"
      [ngClass]="{ 'is-invalid': userForm.submitted && name.invalid }" required>
    <div class="invalid-feedback" *ngIf="userForm.submitted && name.invalid">
      <p *ngIf="name.errors.required">Name is required</p>
    </div>
  </div>
</form>

We add the required validation in the name field, to access the form control inside the template. We created the name variable and assigned to “ngModel”.

To add the Bootstrap form validation, we implemented the validation to the class. Class validation applies only when the user submits the form and form is invalid.

To show the error message we used the Angular *ngIf directive and checking the input condition on submission and if the form is invalid.

Same way we applied the form validation in other input fields. Open the app.component.html file and add the following code.

<form #userForm="ngForm" (ngSubmit)="userForm.form.valid && onSubmit(userForm)">
  <div class="form-group">
    <label>Name</label>
    <input type="text" name="name" class="form-control" [(ngModel)]="model.name" #name="ngModel"
      [ngClass]="{ 'is-invalid': userForm.submitted && name.invalid }" required>
    <div class="invalid-feedback" *ngIf="userForm.submitted && name.invalid">
      <p *ngIf="name.errors.required">Name is required</p>
    </div>
  </div>

  <div class="form-group">
    <label>Email</label>
    <input type="email" class="form-control" name="email" [(ngModel)]="model.email" #email="ngModel"
      [ngClass]="{ 'is-invalid': userForm.submitted && email.invalid }" email required>
    <div *ngIf="userForm.submitted && email.invalid" class="invalid-feedback">
      <div *ngIf="email.errors.required">Email is required</div>
      <div *ngIf="email.errors.email">Must be a valid email address</div>
    </div>
  </div>

  <div class="form-group">
    <label>Password</label>
    <input type="password" class="form-control" name="password" [(ngModel)]="model.password" #password="ngModel"
      [ngClass]="{ 'is-invalid': userForm.submitted && password.invalid }" minlength="8" required>
    <div *ngIf="userForm.submitted && password.invalid" class="invalid-feedback">
      <div *ngIf="password.errors.required">Password is required</div>
      <div *ngIf="password.errors.minlength">Password should be at least 8 characters long</div>
    </div>
  </div>

  <div class="form-group">
    <label>Hobbies</label>
    <select class="form-control" name="hobbies" [(ngModel)]="hobbies">
      <option value="">Select an option</option>
      <option *ngFor="let hoby of Hobbies" [value]="hoby">
        {{hoby}}
      </option>
    </select>
  </div>

  <div class="form-group">
    <button class="btn btn-danger btn-block">Submit</button>
  </div>
</form>

Conclusion

Finally, we have completed the Angular 9 Forms tutorial, and In this tutorial, we learned how to create Angular form with the template-driven approach.

We learnt how to implement Bootstrap in Angular and create forms with Bootstrap.

We looked at how to work with the ngModel directive to handle the Angular form data.

We looked at how to add validation in template-driven forms as well as how to submit a form.

To get the full code of this tutorial visit this GitHub repository.

Thanks a lot for reading this tutorial.

#Angular #Bootstrap #WebDev #JavaScript

Turner  Crona

Turner Crona

1595950620

Angular simple dynamic template-driven form for beginners

Template driven forms are model driven forms driven by directives in a template. Template driven forms are approached by angular JS users but sometimes template driven forms will be used for complex systems. For instance, if you want to dynamically set to validate a particular form filed you can use template driven forms. In the template driven forms uses two way data binding in terms of it uses ngModel despite formControl and fromGroups.

Form structure

I am going to create a simple form that is able to create new form fields. The number of form-fields depends on the user. It can be changed at run time.

However, each form entry requires a name like formControlName in reactive forms and the state of the form as a whole that is a collection of individual form fields. Each form filed is assigned a unique id property. Therefore, template driven form controls need to be uniquely named. We can generate form fields using a unique control name. In this dynamic form, it has been used the current timestamp as a unique id or you can create a method to get random numbers to assign for this unique id. So it can get through with parent NgForm.

First, import formsModule to main module ex:- app.module.ts then create an interface to describe an object. You have to set some properties you want to this interface.

<form #parentForm="ngForm" (submit)="submitParentForm(parentForm)">
	    <ng-template ngFor let-form [ngForOf]="mainForm.formFields" let-index="index" let-isLast="last">
	        <input
	            type="form.formField1.type"
	            name="formFirld1_{{ form.id }}"
	            [(ngModel)]="form.formField1.value"
	            placeholder="form.formField1.placeholder"
	            required
	        />
	        <div *ngIf="parentForm.submitted && !form.formField1.value">Form field 1 is required</div>
	        <input
	            type="form.formField2.type"
	            name="formFirld2_{{ form.id }}"
	            [(ngModel)]="form.formField2.value"
	            placeholder="form.formField2.placeholder"
	            required
	        />
	         <div *ngIf="parentForm.submitted && !form.formField2.value">Form field 2 is required</div>
	        <button (click)="removeForm(index)">Remove form</button>
	    </ng-template>
	    <button type="submit">Submit</button>
	    <button type="button" (click)="parentForm.reset()">
	        Reset
	    </button>
	</form>
	<button (click)="addForm()" [disabled]="(!parentForm.form.valid)">Add new form</button>

#dynamic-form #angular-for-beginners #template-driven-form #angular

Hal  Sauer

Hal Sauer

1591066502

How to Make Simple Sidebar Template with Bootstrap 4 and Angular 9?

In this post, I will tell you, How to make simple sidebar template with Bootstrap 4 and Angular 9?

In this, you can see bootstrap toggle sidebar navigation menu. During click on Toggle menu, sidebar navigation will show and hide.

#angular 8 #angular 9 #angular7 #bootstrap 4 #bootstrap templates

Clara  Gutmann

Clara Gutmann

1599459851

Angular Sass: How To Use Sass In Angular 9 Tutorial

Angular supports Sass, CSS, and Less to style global application styles as well as component styles. Angular components styles have an effective CSS encapsulation mechanism that assures any component CSS is local to the component and does not globally alter any styles.

Angular Sass Example

Why use Angular Sass? Well!! Sass (Syntactically Awesome Style Sheets) is an extension of CSS that allows you to use things like variables, nested rules, inline imports, and more. It also supports you to keep things organized and enables you to create style sheets faster.

In short,  Sass is a CSS preprocessor, which combines unique features such as variables, nested rules, and mixins (sometimes referred to as syntactic sugar) into regular CSS. The main object of Sass is to make the CSS coding process more comfortable and more efficient.

Sass is compatible with all versions of CSS. When working with the Angular CLI, the default stylesheets have the .css extension. We are using Angular CLI 8. So, if you have not used previously, then please upgrade your  CLI version. We will use the Bootstrap 4 Framework for this demo and see how we can configure the Sass in our Angular 9 application.

#angular #angular 9 #angular cli #css #angular sass