Angular 5 and 4 Show Hide or Toggle Elements

Show Hide or Toggle Elements In Angular 5 and 4

How to Show Hide or Toggle Elements in Angular 5 and 4?
In this post, I am sharing a sample code for demo “how to toggle or show and hide elements in Angular 5 and 4”. In the current scenario, I have a HTML <div> element, which contains some HTML elements like textbox, password and buttons. It will show and hide the dive – form elements after click on button.

Let’s see in the below example -
Component.html -
<!-- Show Hide or Toggle Elements in Angular 5 and 4 -->
<button (click)="toggle()" id="btToggle" class="btn btn-info btn-lg" >{{button_name}}</button>

<div *ngIf="show_dialog">
  <div style="padding-left: 50px;">
    <div>
        <div>Email - <input  id="email" type="text" name="txtEmail" /></div>
    </div>
    <div>
          <div>Password - <input id="txtPasword" type="password" name="password" /></div>
    </div>
    <div>
        <label>About you (optional)-</label>
        <div><textarea rows="4" cols="50"></textarea></div>
    </div>
    <div>
      <div><button id="btAddLogin" class="btn btn-info btn-lg" >Add</button>
      </div>
  </div>
  </div>
</div>

Component.ts –
import { Component, OnInit } from '@angular/core';
import {FormGroup, FormControl, Validators}  from '@angular/forms';
import { stringify } from '@angular/core/src/render3/util';
import { variable } from '@angular/compiler/src/output/output_ast';
import { trigger,state, group, style,transition,animate,keyframes,query,stagger } from '@angular/animations';

@Component({
  selector: 'app-user',
  templateUrl: './user.component.html',
  styleUrls: ['./user.component.css'],
  animations: [  ]
})
export class UserComponent implements OnInit {
  date; //date Variable
  logedInForm; //These are variables
  emailId;
  password;

  public show_dialog : boolean = false;
  public button_name : any = 'Show Login Form!';

  constructor() { }

  ngOnInit() {
    this.date = new Date(); // Today date and time
    //Login Validation
    this.logedInForm = new FormGroup({
      emailId: new FormControl("[email protected]",
        Validators.compose([
          Validators.required,
          Validators.pattern("[^ @]*@[^ @]*")
      ])),
      password: new FormControl('YourPassword', [
           Validators.minLength(8),
           Validators.required])
    });
  }

  toggle() {
    this.show_dialog = !this.show_dialog;

    // CHANGE THE TEXT OF THE BUTTON.
    if(this.show_dialog) 
      this.button_name = "Hide Login Form!";
    else
      this.button_name = "Show Login Form!";
  }
}

Result looks like –

ANIL SINGH

Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..
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