angular - Display country by typing

Angular - Display country by typing

If you want to display a list of countries as a user types in Angular, you can create a typeahead or autocomplete feature. Angular provides a built-in directive called ngbTypeahead that can be used in combination with NgBootstrap to implement typeahead functionality.

Here's a simple example demonstrating how you can achieve this:

  1. Install NgBootstrap:

    npm install --save @ng-bootstrap/ng-bootstrap

  2. Import NgBootstrapModule in your Angular module:

    import { NgbModule } from '@ng-bootstrap/ng-bootstrap'; @NgModule({ declarations: [/* ... */], imports: [NgbModule, /* ... */], bootstrap: [/* ... */] }) export class YourModule { }

  3. Create a component with a list of countries and implement the typeahead functionality:

    import { Component } from '@angular/core'; import { FormControl } from '@angular/forms'; import { debounceTime, distinctUntilChanged, map } from 'rxjs/operators'; const countries = [ 'Afghanistan', 'Albania', 'Algeria', /* ... add more countries ... */ ]; @Component({ selector: 'app-country-typeahead', template: ` <input type="text" [formControl]="countryControl" placeholder="Type a country" class="form-control" [ngbTypeahead]="search"> ` }) export class CountryTypeaheadComponent { countryControl = new FormControl(); search = (text$: any) => text$.pipe( debounceTime(200), distinctUntilChanged(), map(term => term.length < 2 ? [] : countries.filter(country => country.toLowerCase().indexOf(term.toLowerCase()) > -1).slice(0, 10)) ); }

    In this example, the ngbTypeahead directive is bound to the search method. The search method filters the list of countries based on the user input and returns the matching results.

  4. Add the CountryTypeaheadComponent to your module's declarations:

    @NgModule({ declarations: [CountryTypeaheadComponent], imports: [NgbModule], })

  5. Include the component in your template or use it in your routing configuration.

    <app-country-typeahead></app-country-typeahead>

This is a basic example, and you can customize it further based on your requirements. Additionally, you may want to handle the selection of the country and perform actions accordingly. Adjust the example as needed for your application.

Examples

  1. "Angular autocomplete country by typing"

    • Code Implementation:
      <input type="text" [(ngModel)]="searchTerm" (input)="filterCountries()" placeholder="Type to search"> <ul> <li *ngFor="let country of filteredCountries">{{ country.name }}</li> </ul> 
      // In your component countries: Country[] = []; // Assuming you have a list of countries filteredCountries: Country[] = []; searchTerm: string = ''; filterCountries() { this.filteredCountries = this.countries.filter(country => country.name.toLowerCase().includes(this.searchTerm.toLowerCase()) ); }
    • Description: Implementing a simple country filter as the user types using Angular's ngModel and an input event.

  2. "Angular typeahead for country selection"

    • Code Implementation: Utilize a typeahead library like ng-bootstrap or ngx-typeahead for enhanced functionality.
      <input [(ngModel)]="selectedCountry" [ngbTypeahead]="searchCountries" placeholder="Type to search"> 
      // In your component searchCountries = (text$: Observable<string>) => text$.pipe( debounceTime(200), distinctUntilChanged(), map(term => term === '' ? [] : this.countries.filter(country => country.name.toLowerCase().indexOf(term.toLowerCase()) > -1).slice(0, 10)) ); selectedCountry: string = '';
    • Description: Enhancing the typing experience using a typeahead library with asynchronous filtering.

  3. "Angular filter countries by typing with debounce"

    • Code Implementation: Apply a debounce for smoother and optimized typing.
      <input type="text" [(ngModel)]="searchTerm" (input)="filterCountries()" placeholder="Type to search"> <ul> <li *ngFor="let country of filteredCountries">{{ country.name }}</li> </ul> 
      // In your component filterCountries() { debounce(() => { this.filteredCountries = this.countries.filter(country => country.name.toLowerCase().includes(this.searchTerm.toLowerCase()) ); }, 300); }
    • Description: Implementing debouncing for a smoother user experience while typing.

  4. "Angular live search for country names"

    • Code Implementation: Enable live search with real-time updates.
      <input type="text" [(ngModel)]="searchTerm" (input)="filterCountries()" placeholder="Type to search"> <ul> <li *ngFor="let country of filteredCountries$ | async">{{ country.name }}</li> </ul> 
      // In your component filteredCountries$: Observable<Country[]>; filterCountries() { this.filteredCountries$ = of(this.countries.filter(country => country.name.toLowerCase().includes(this.searchTerm.toLowerCase()) )); }
    • Description: Implementing a live search with real-time updates using Angular's async pipe.

  5. "Angular autocomplete input with country names"

    • Code Implementation: Use a third-party autocomplete library like ng-autocomplete for a feature-rich solution.
      <ng-autocomplete [(ngModel)]="selectedCountry" [data]="countries" [searchKeyword]="searchTerm" placeholder="Type to search"></ng-autocomplete> 
      // In your component countries: Country[] = []; // Assuming you have a list of countries selectedCountry: string = ''; searchTerm: string = '';
    • Description: Integrating an autocomplete input using a third-party library.

  6. "Angular filter countries by typing with RxJS"

    • Code Implementation: Utilize RxJS operators for more advanced filtering.
      <input type="text" [(ngModel)]="searchTerm" (input)="filterCountries()" placeholder="Type to search"> <ul> <li *ngFor="let country of filteredCountries">{{ country.name }}</li> </ul> 
      // In your component filterCountries() { this.filteredCountries = this.countries$.pipe( map(countries => countries.filter(country => country.name.toLowerCase().includes(this.searchTerm.toLowerCase()) ) ) ); }
    • Description: Leveraging RxJS operators for advanced filtering in Angular.

  7. "Angular country autocomplete with ng-select"

    • Code Implementation: Utilize the ng-select library for a customizable autocomplete solution.
      <ng-select [(ngModel)]="selectedCountry" [items]="countries" bindLabel="name" placeholder="Type to search"></ng-select> 
      // In your component countries: Country[] = []; // Assuming you have a list of countries selectedCountry: string = '';
    • Description: Implementing a country autocomplete with the ng-select library for flexibility and customization.

  8. "Angular autocomplete with custom country component"

    • Code Implementation: Create a custom country component for a more personalized display.
      <app-country-autocomplete [(ngModel)]="selectedCountry" [countries]="countries"></app-country-autocomplete> 
      // In your custom country autocomplete component @Input() countries: Country[] = []; @Output() countrySelected = new EventEmitter<string>();
    • Description: Building a custom country autocomplete component for a personalized user interface.

  9. "Angular filter countries by typing with reactive forms"

    • Code Implementation: Implement filtering using Angular Reactive Forms.
      <form [formGroup]="searchForm"> <input formControlName="searchTerm" placeholder="Type to search"> </form> <ul> <li *ngFor="let country of filteredCountries">{{ country.name }}</li> </ul> 
      // In your component searchForm: FormGroup; constructor(private fb: FormBuilder) { this.searchForm = this.fb.group({ searchTerm: [''] }); } filterCountries() { const searchTerm = this.searchForm.get('searchTerm').value; this.filteredCountries = this.countries.filter(country => country.name.toLowerCase().includes(searchTerm.toLowerCase()) ); }
    • Description: Implementing country filtering using Angular Reactive Forms for a more structured approach.

  10. "Angular country autocomplete with MatAutocomplete"

    • Code Implementation: Use Angular Material's MatAutocomplete for a clean and accessible autocomplete solution.
      <input type="text" [(ngModel)]="selectedCountry" [matAutocomplete]="auto" placeholder="Type to search"> <mat-autocomplete #auto="matAutocomplete"> <mat-option *ngFor="let country of filteredCountries" [value]="country.name"> {{ country.name }} </mat-option> </mat-autocomplete> 
      // In your component countries: Country[] = []; // Assuming you have a list of countries filteredCountries: Country[] = []; selectedCountry: string = ''; filterCountries() { this.filteredCountries = this.countries.filter(country => country.name.toLowerCase().includes(this.selectedCountry.toLowerCase()) ); }
    • Description: Implementing country autocomplete using Angular Material's MatAutocomplete for a polished and accessible solution.

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