source: trip-planner-front/src/app/locations-form/locations-form.component.html

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet"
  integrity="sha384-+0n0xVW2eSR5OomGNYDnhzAbDsOXxcvSN1TPprVMTNDbiYZCxYbOOl7+AMvyTG2x" crossorigin="anonymous">


<div class="example-form">

  <div class="form-group">
    <button class="btn" (click)="chooseCityOption()">
      City
    </button>
    <button class="btn" (click)="chooseRegionOption()">
      Region
    </button>
  </div>
  <br>
  <br>

  <div *ngIf="cityOption">
    <label>
      <h5>Please select a city</h5>
    </label>
    <mat-form-field appearance="fill" class="example-full-width">
      <mat-label>Please select a city</mat-label>
      <mat-select [(ngModel)]="cityId" placeholder="Select city" name="city">
        <mat-option [value]="city.id" *ngFor="let city of cities"> {{city.name}}</mat-option>
      </mat-select>
    </mat-form-field>
  </div>

  <div *ngIf="regionOption">
    <label>
      <h5>Please select a region</h5>
    </label>
    <mat-form-field appearance="fill" class="example-full-width">
      <mat-label>Please select a region</mat-label>
      <mat-select [(ngModel)]="regionId" placeholder="Select region" name="region">
        <mat-option [value]="region.id" *ngFor="let region of regions"> {{region.name}}
        </mat-option>
      </mat-select>
    </mat-form-field>
  </div>

  <h5>Who are you travelling with? </h5>
  <mat-form-field appearance="fill" class="example-full-width">
    <mat-label>Please select a companion</mat-label>
    <mat-select [(ngModel)]="companionId" placeholder="Please select a companion" name="company">
      <mat-option [value]="companion.id" *ngFor="let companion of companions">{{companion.type}}</mat-option>
    </mat-select>
  </mat-form-field>

  <h5>How many days are you willing to stay ?</h5>
  <mat-form-field class="example-full-width" appearance="fill">
    <mat-label>Please select a number of days</mat-label>
    <input matInput placeholder="No. Days" type="number" min="1" value="0" max="30" [constraintMaxNumberDays()]
      [(ngModel)]="lengthOfStay" name="nomdays" [value]="lengthOfStay">
  </mat-form-field>

  <h5>What are your priorities to visit?</h5>
  <mat-chip-list selectable multiple>
    <mat-chip #c="matChip" selected *ngFor="let category of categories" (click)="toggleSelection(c, category)"
      [ngClass]="{'yellow' : toggle}" name="chips">
      <mat-icon *ngIf="!c.selected">check</mat-icon>
      {{category.name}}
    </mat-chip>
  </mat-chip-list>
  <br>
  <button mat-raised-button color="primary" (click)="createMyPlanner()">Create my planner</button>

</div>