Turner  Crona

Turner Crona

1595899980

Angular + Reactive Forms - Required Checkbox Example

This is a quick example of how to implement a required checkbox field in Angular with Reactive Forms. For a more detailed registration form example that includes a bunch of other fields see Angular 10 - Reactive Forms Validation Example.

Here it is in action:

(See on StackBlitz at https://stackblitz.com/edit/angular-reactive-forms-required-checkbox)

Angular Required Checkbox App Component

The app component contains an example form (FormGroup) which contains a single boolean field with a requiredTrue validator to make a checkbox field required. The app component uses a FormBuilder to create an instance of a FormGroup that is stored in the form property. The form property is then bound to the <form> element of the app template below using the [formGroup] directive.

The component contains a convenience getter property f to make it easier to access form controls from the template. So for example you can access the confirmPassword field in the template using f.confirmPassword instead of registerForm.controls.confirmPassword.

import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';

@Component({ selector: 'app', templateUrl: 'app.component.html' })
export class AppComponent implements OnInit {
    form: FormGroup;
    submitted = false;

    constructor(private formBuilder: FormBuilder) { }

    ngOnInit() {
        this.form = this.formBuilder.group({
            acceptTerms: [false, Validators.requiredTrue]
        });
    }

    // convenience getter for easy access to form fields
    get f() { return this.form.controls; }

    onSubmit() {
        this.submitted = true;

        // stop here if form is invalid
        if (this.form.invalid) {
            return;
        }

        // display form values on success
        alert('SUCCESS!! :-)\n\n' + JSON.stringify(this.form.value, null, 4));
    }

    onReset() {
        this.submitted = false;
        this.form.reset();
    }
}

App Component Template

The app component template contains the html markup for displaying the example required checkbox form in the browser. The form element uses the [formGroup] directive to bind to the form FormGroup in the app component above.

The form binds the form submit event to the onSubmit() handler in the app component using the Angular event binding (ngSubmit)="onSubmit()". Validation messages are displayed only after the user attempts to submit the form for the first time, this is controlled with the submitted property of the app component.

The reset button click event is bound to the onReset() handler in the app component using the Angular event binding (click)="onReset()".

#angular #reactive forms #required checkbox #component #formgroup

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Buddha Community

Angular + Reactive Forms - Required Checkbox Example
Turner  Crona

Turner Crona

1595899980

Angular + Reactive Forms - Required Checkbox Example

This is a quick example of how to implement a required checkbox field in Angular with Reactive Forms. For a more detailed registration form example that includes a bunch of other fields see Angular 10 - Reactive Forms Validation Example.

Here it is in action:

(See on StackBlitz at https://stackblitz.com/edit/angular-reactive-forms-required-checkbox)

Angular Required Checkbox App Component

The app component contains an example form (FormGroup) which contains a single boolean field with a requiredTrue validator to make a checkbox field required. The app component uses a FormBuilder to create an instance of a FormGroup that is stored in the form property. The form property is then bound to the <form> element of the app template below using the [formGroup] directive.

The component contains a convenience getter property f to make it easier to access form controls from the template. So for example you can access the confirmPassword field in the template using f.confirmPassword instead of registerForm.controls.confirmPassword.

import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';

@Component({ selector: 'app', templateUrl: 'app.component.html' })
export class AppComponent implements OnInit {
    form: FormGroup;
    submitted = false;

    constructor(private formBuilder: FormBuilder) { }

    ngOnInit() {
        this.form = this.formBuilder.group({
            acceptTerms: [false, Validators.requiredTrue]
        });
    }

    // convenience getter for easy access to form fields
    get f() { return this.form.controls; }

    onSubmit() {
        this.submitted = true;

        // stop here if form is invalid
        if (this.form.invalid) {
            return;
        }

        // display form values on success
        alert('SUCCESS!! :-)\n\n' + JSON.stringify(this.form.value, null, 4));
    }

    onReset() {
        this.submitted = false;
        this.form.reset();
    }
}

App Component Template

The app component template contains the html markup for displaying the example required checkbox form in the browser. The form element uses the [formGroup] directive to bind to the form FormGroup in the app component above.

The form binds the form submit event to the onSubmit() handler in the app component using the Angular event binding (ngSubmit)="onSubmit()". Validation messages are displayed only after the user attempts to submit the form for the first time, this is controlled with the submitted property of the app component.

The reset button click event is bound to the onReset() handler in the app component using the Angular event binding (click)="onReset()".

#angular #reactive forms #required checkbox #component #formgroup

I am Developer

1608866530

Angular 11 Reactive Forms Validation Tutorial

Reactive form validation in Angular 11 app. In this tutorial, i will show you how to use reactive form validation in angular 11 app.

As well as, and you will learn how use reactive form validation in angular 11. And also use reactive form with formGroup for validation in angular 11 app.

Reactive Form Validation In Angular 11
Step 1 – Create New Angular App
Step 2 – Import Form Module
Step 3 – Add Code on View File
Step 4 – Use Component ts File
Step 5 – Start Angular App

https://www.tutsmake.com/angular-11-reactive-forms-validation-tutorial-example/

#reactive form validation in angular 11 #angular 11/10/9/8/7 reactive forms validation example #angular 11 form validation example

I am Developer

1615040237

PHP jQuery Ajax Post Form Data Example

PHP jquery ajax POST request with MySQL. In this tutorial, you will learn how to create and submit a simple form in PHP using jQuery ajax post request. And how to submit a form data into MySQL database without the whole page refresh or reload. And also you will learn how to show an error message to the user if the user does not fill any form field.

And this tutorial also guide on how to send data to MySQL database using AJAX + jQuery + PHP without reloading the whole page and show a client-side validation error message if it has an error in the form.

PHP jQuery AJAX POST Form Data In Into MySQL DB Example

Just follow the few below steps and easily create and submit ajax form in PHP and MySQL with client-side validation.

  • Create Database And Table
  • Create a Database Connection File
  • Create An Ajax POST Form in PHP
  • Create An Ajax Data Store File

https://www.tutsmake.com/php-jquery-ajax-post-tutorial-example/

#jquery ajax serialize form data example #submit form using ajax in php example #save form data using ajax in php #how to insert form data using ajax in php #php jquery ajax form submit example #jquery ajax and jquery post form submit example with php

Christa  Stehr

Christa Stehr

1598940617

Install Angular - Angular Environment Setup Process

Angular is a TypeScript based framework that works in synchronization with HTML, CSS, and JavaScript. To work with angular, domain knowledge of these 3 is required.

  1. Installing Node.js and npm
  2. Installing Angular CLI
  3. Creating workspace
  4. Deploying your First App

In this article, you will get to know about the Angular Environment setup process. After reading this article, you will be able to install, setup, create, and launch your own application in Angular. So let’s start!!!

Angular environment setup

Install Angular in Easy Steps

For Installing Angular on your Machine, there are 2 prerequisites:

  • Node.js
  • npm Package Manager
Node.js

First you need to have Node.js installed as Angular require current, active LTS or maintenance LTS version of Node.js

Download and Install Node.js version suitable for your machine’s operating system.

Npm Package Manager

Angular, Angular CLI and Angular applications are dependent on npm packages. By installing Node.js, you have automatically installed the npm Package manager which will be the base for installing angular in your system. To check the presence of npm client and Angular version check of npm client, run this command:

  1. npm -v

Installing Angular CLI

  • Open Terminal/Command Prompt
  • To install Angular CLI, run the below command:
  1. npm install -g @angular/cli

installing angular CLI

· After executing the command, Angular CLI will get installed within some time. You can check it using the following command

  1. ng --version

Workspace Creation

Now as your Angular CLI is installed, you need to create a workspace to work upon your application. Methods for it are:

  • Using CLI
  • Using Visual Studio Code
1. Using CLI

To create a workspace:

  • Navigate to the desired directory where you want to create your workspace using cd command in the Terminal/Command prompt
  • Then in the directory write this command on your terminal and provide the name of the app which you want to create. In my case I have mentioned DataFlair:
  1. Ng new YourAppName

create angular workspace

  • After running this command, it will prompt you to select from various options about the CSS and other functionalities.

angular CSS options

  • To leave everything to default, simply press the Enter or the Return key.

angular setup

#angular tutorials #angular cli install #angular environment setup #angular version check #download angular #install angular #install angular cli

Clara  Gutmann

Clara Gutmann

1599478860

Angular 7 Forms Tutorial Example

Angular 7 Forms Tutorial Example is today’s leading topic. For this example, we will use Reactive forms. Reactive forms provide the model-driven approach to handle the form inputs whose values are changing over time. Reactive forms use the specific and immutable approach to managing the state of the form at the given point of time. Each change to the form state returns the new state, which maintains the integrity of a model between the changes. Reactive forms also provide the straightforward path to testing because you are assured that your data is consistent and predictable when the request has been made.

Angular 7 Forms Tutorial Example

Let us install Angular 7 using Angular CLI using the following command.

#angular #angular cli #angular 7 #reactive forms