Développement d'un KIT UI dans Angular 18

Créons plusieurs composants de notre application.

Dans ce cas, nous avons besoin de l'interface utilisateur suivante :

• accordéon - accordéon;
• saisie semi-automatique — saisie avec saisie semi-automatique ;
• boutons - boutons ;
• cartes - cartes;
• case à cocher - cases à cocher ;
• conteneur - centre le contenu ;
• datepicker - sélecteur de date ;
• boîte de dialogue - fenêtres modales ;
• titre - texte promotionnel ;
• icônes — ensemble d'icônes svg ;
• entrée - entrées ;
• étiquette - étiquettes ;
• mise en page - mise en page ;
• navigation - menu ;
• section — tâche d'arrière-plan pour les sections du contenu ;
• titre - titres.

Les éléments complexes utiliseront angulaire/cdk (dialogue, accordéon) pour simplifier le processus.

Ajoutons donc le package :

yarn add -D @angular/cdk

Et un peu de magie pour les scss :

{
  "inlineStyleLanguage": "scss",
  "stylePreprocessorOptions": {
    "includePaths": ["node_modules", "./"]
  }
}

Création d'utilitaires

Ajoutez un nouveau répertoire utils à l'interface utilisateur :

mkdir src/app/ui/utils
mkdir src/app/ui/utils/lib
echo >src/app/ui/utils/index.ts

Dans tsconfig.json nous écrirons l'alias :

{
  "paths": {
    "@baf/ui/utils": ["src/app/ui/utils/index.ts"]
  }
}

Définissons plusieurs types dans types.ts :

export type ButtonMode = 'primary' | 'secondary' | 'tertiary' | undefined;

export type Size = 'small' | 'medium' | 'large' | undefined;
export type Align = 'left' | 'center' | 'right' | undefined;
export type ExtraSize = 'xsmall' | 'small' | 'medium' | 'large' | 'xlarge' | undefined;
export type Width = 'max' | 'initial' | undefined;

Ils sont tous facultatifs, ils contiennent donc un élément indéfini.

Quelques propriétés communes des composants :

• aligner - centrer à gauche, à droite ;
• désactivé - état désactivé (pertinent pour les formulaires);
• taille, extra-taille - taille du texte petit, moyen et grand
• mode - types de boutons ;
• largeur - largeur de l'élément.

AlignerDirective

Exemple d'implémentation d'align :

import { Directive, inject, input } from '@angular/core';

import { ExtraClassService, toClass } from '@baf/core';

import type { Align } from './types';

@Directive({
  selector: '[bafAlign]',
  standalone: true,
  providers: [ExtraClassService],
})
export class AlignDirective {
  private readonly extraClassService = inject(ExtraClassService);

  readonly align = input<Align, Align>(undefined, {
    alias: 'bafAlign',
    transform: (value) => {
      this.extraClassService.update('align', toClass(value, 'align'));

      return value;
    },
  });
}

ExtraClassService - un service qui ajoute la classe correspondante.

Comme alternative, vous pouvez utiliser @HostBinding('class.align-center') ou définir des règles via l'hôte.

Puisqu'angular ne vous permet pas d'inclure des styles dans la directive, ajoutons un mixin qui doit être importé pour chaque composant.

Créez un fichier align.scss dans src/stylesheets :

@mixin make-align() {
  &.align-left {
    text-align: left;
  }

  &.align-center {
    text-align: center;
  }

  &.align-right {
    text-align: right;
  }
}

Exemple d'utilisation :

@use 'src/stylesheets/align' as align;
:host {
  @include align.make-align();
}

Les directives restantes sont similaires.

Récipient

Ajoutez un conteneur et entrez un alias.

mkdir src/app/ui/container
mkdir src/app/ui/container/lib
echo >src/app/ui/container/index.ts

Générer le composant :

yarn ng g c container

Déplacez-le vers src/app/ui/container/lib et modifiez ContainerComponent :

import { ChangeDetectionStrategy, Component } from '@angular/core';
import { RouterOutlet } from '@angular/router';

import { AlignDirective } from '@baf/ui/utils';

import { FluidDirective } from './fluid.directive';
import { MobileDirective } from './mobile.directive';

@Component({
  selector: 'baf-container',
  standalone: true,
  imports: [RouterOutlet],
  template: '<ng-content/>',
  styleUrl: './container.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  host: {
    class: 'baf-container',
  },
  hostDirectives: [
    {
      directive: FluidDirective,
      inputs: ['bafFluid'],
    },
    {
      directive: MobileDirective,
      inputs: ['bafMobile'],
    },
    {
      directive: AlignDirective,
      inputs: ['bafAlign'],
    },
  ],
})
export class ContainerComponent {}

Ajouter des styles :

@use 'src/stylesheets/align' as align;
@use 'src/stylesheets/device' as device;

:host {
  display: flex;
  flex-direction: column;
  margin-left: auto;
  margin-right: auto;
  width: 100%;

  &.fluid {
    max-width: 100%;
  }

  &:not(.mobile-no-gutter) {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  @include align.make-align();

  @include device.media-tablet-portrait() {
    &:not(.fluid) {
      max-width: 788px;
    }
  }

  @include device.media-tablet-landscape() {
    &:not(.fluid) {
      max-width: 928px;
    }
  }

  @include device.media-web-portrait() {
    &:not(.fluid) {
      max-width: 808px;
    }
  }

  @include device.media-web-landscape() {
    &:not(.fluid) {
      max-width: 1200px;
    }
  }
}

Mixins de largeur extraits du matériau :

@mixin media-handset() {
  @media (max-width: 599.98px) and (orientation: portrait), (max-width: 959.98px) and (orientation: landscape) {
    @content;
  }
}
@mixin media-handset-up() {
  @media (min-width: 0) and (orientation: portrait), (min-width: 0) and (orientation: landscape) {
    @content;
  }
}

@mixin media-handset-portrait() {
  @media (max-width: 599.98px) and (orientation: portrait) {
    @content;
  }
}

@mixin media-handset-landscape() {
  @media (max-width: 959.98px) and (orientation: landscape) {
    @content;
  }
}

@mixin media-tablet() {
  @media (min-width: 600px) and (max-width: 839.98px) and (orientation: portrait),
    (min-width: 960px) and (max-width: 1279.98px) and (orientation: landscape) {
    @content;
  }
}

@mixin media-tablet-up() {
  @media (min-width: 600px) and (orientation: portrait), (min-width: 960px) and (orientation: landscape) {
    @content;
  }
}

@mixin media-tablet-landscape() {
  @media (min-width: 960px) and (max-width: 1279.98px) and (orientation: landscape) {
    @content;
  }
}

@mixin media-tablet-portrait() {
  @media (min-width: 600px) and (max-width: 839.98px) and (orientation: portrait) {
    @content;
  }
}

@mixin media-web() {
  @media (min-width: 840px) and (orientation: portrait), (min-width: 1280px) and (orientation: landscape) {
    @content;
  }
}

@mixin media-web-up() {
  @media (min-width: 840px) and (orientation: portrait), (min-width: 1280px) and (orientation: landscape) {
    @content;
  }
}

@mixin media-web-portrait() {
  @media (min-width: 840px) and (orientation: portrait) {
    @content;
  }
}

@mixin media-web-landscape() {
  @media (min-width: 1280px) and (orientation: landscape) {
    @content;
  }
}

Nous allons également créer deux directives FluidDirective et MobileDirective :

import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { Directive, inject, input } from '@angular/core';

import type { CoerceBoolean } from '@baf/core';
import { ExtraClassService } from '@baf/core';

@Directive({
  selector: 'baf-container[bafFluid]',
  standalone: true,
  providers: [ExtraClassService],
})
export class FluidDirective {
  private readonly extraClassService = inject(ExtraClassService);

  readonly fluid = input<CoerceBoolean, CoerceBoolean>(undefined, {
    alias: 'bafFluid',
    transform: (value) => {
      this.extraClassService.patch('fluid', coerceBooleanProperty(value));

      return value;
    },
  });
}

import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { Directive, inject, input } from '@angular/core';

import type { CoerceBoolean } from '@baf/core';
import { ExtraClassService } from '@baf/core';

@Directive({
  selector: 'baf-container[bafMobile]',
  standalone: true,
  providers: [ExtraClassService],
})
export class MobileDirective {
  private readonly extraClassService = inject(ExtraClassService);

  readonly mobile = input<CoerceBoolean, CoerceBoolean>(undefined, {
    alias: 'bafMobile',
    transform: (value) => {
      this.extraClassService.patch('mobile-no-gutter', coerceBooleanProperty(value));

      return value;
    },
  });
}

Titre, étiquette, titre, section et carte

Ajoutez un titre et saisissez un alias :

mkdir src/app/ui/title
mkdir src/app/ui/title/lib
echo >src/app/ui/title/index.ts

Générer le composant :

yarn ng g c title

Déplacez-le vers src/app/ui/title/lib et modifiez TitleComponent :

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

import { AlignDirective, SizeDirective } from '@baf/ui/utils';

@Component({
  selector: 'baf-title,[baf-title],[bafTitle]',
  standalone: true,
  template: '<ng-content/>',
  styleUrl: './title.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  host: {
    class: 'baf-title',
  },
  hostDirectives: [
    {
      directive: SizeDirective,
      inputs: ['bafSize'],
    },
    {
      directive: AlignDirective,
      inputs: ['bafAlign'],
    },
  ],
})
export class TitleComponent {}

Quelques styles :

@use 'src/stylesheets/align' as align;
@use 'src/stylesheets/size' as size;
@use 'src/stylesheets/typography' as typography;

:host {
  @include size.make-size() using ($size) {
    @if $size == small {
      @include typography.title-small();
    } @else if $size == medium {
      @include typography.title-medium();
    } @else if $size == large {
      @include typography.title-large();
    }
  }
  @include align.make-align();
}

Nous faisons le reste de la même manière.

Boutons

Passons à la création de widgets plus complexes.

Ajoutez des boutons et saisissez un alias :

mkdir src/app/ui/buttons
mkdir src/app/ui/buttons/lib
echo >src/app/ui/buttons/index.ts

Étant donné que les boutons sont nécessaires dans plusieurs types, nous définirons les types de base -ButtonBase et AnchorBase :

import type { FocusOrigin } from '@angular/cdk/a11y';
import { FocusMonitor } from '@angular/cdk/a11y';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import type { AfterViewInit, OnDestroy, OnInit } from '@angular/core';
import { Directive, ElementRef, inject, NgZone } from '@angular/core';

@Directive()
export class ButtonBase implements AfterViewInit, OnDestroy {
  protected readonly elementRef = inject(ElementRef);

  private isDisabled = false;

  private readonly focusMonitor = inject(FocusMonitor);

  get disabled(): boolean {
    return this.isDisabled;
  }

  set disabled(value: string | boolean | null | undefined) {
    const disabled = coerceBooleanProperty(value);
    if (disabled !== this.isDisabled) {
      this.isDisabled = disabled;
    }
  }

  ngAfterViewInit() {
    this.focusMonitor.monitor(this.elementRef, true);
  }

  ngOnDestroy() {
    this.focusMonitor.stopMonitoring(this.elementRef);
  }

  focus(origin: FocusOrigin = 'program', options?: FocusOptions): void {
    if (origin) {
      this.focusMonitor.focusVia(this.elementRef.nativeElement, origin, options);
    } else {
      this.elementRef.nativeElement.focus(options);
    }
  }
}

@Directive()
export class AnchorBase extends ButtonBase implements OnInit, OnDestroy {
  private readonly ngZone = inject(NgZone);

  protected readonly haltDisabledEvents = (event: Event) => {
    if (this.disabled) {
      event.preventDefault();
      event.stopImmediatePropagation();
    }
  };

  ngOnInit(): void {
    this.ngZone.runOutsideAngular(() => {
      this.elementRef.nativeElement.addEventListener('click', this.haltDisabledEvents);
    });
  }

  override ngOnDestroy(): void {
    super.ngOnDestroy();
    this.elementRef.nativeElement.removeEventListener('click', this.haltDisabledEvents);
  }
}

Implémentation tirée d'Angular Material 2.

Je n'ai pas regardé Material 3 dans Angular et je ne pense pas que ça en vaut la peine. La complexité des composants est légèrement supérieure à l'infini.

Comme vous pouvez le voir sur l'exemple, l'état désactivé est défini, ainsi que les observateurs ciblés.

Créons un bouton simple. Dans notre cas, il s'agit d'un wrapper par rapport au standard.

Modèle - .

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

import { DisabledDirective, ExtraSizeDirective, ModeDirective, WidthDirective } from '@baf/ui/utils';

import { AnchorBase, ButtonBase } from '../base/button-base';

@Component({
  // eslint-disable-next-line @angular-eslint/component-selector
  selector: 'button[baf-button]',
  standalone: true,
  template: '<ng-content />',
  styleUrl: './button.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  host: {
    class: 'baf-button',
  },
  hostDirectives: [
    {
      directive: ModeDirective,
      inputs: ['bafMode'],
    },
    {
      directive: ExtraSizeDirective,
      inputs: ['bafSize'],
    },
    {
      directive: DisabledDirective,
      inputs: ['disabled'],
    },
    {
      directive: WidthDirective,
      inputs: ['bafWidth'],
    },
  ],
})
export class ButtonComponent extends ButtonBase {}

@Component({
  // eslint-disable-next-line @angular-eslint/component-selector
  selector: 'a[baf-button]',
  standalone: true,
  template: '<ng-content />',
  styleUrls: ['./button.component.scss'],
  changeDetection: ChangeDetectionStrategy.OnPush,
  host: {
    class: 'baf-button',
  },
  hostDirectives: [
    {
      directive: ModeDirective,
      inputs: ['bafMode'],
    },
    {
      directive: ExtraSizeDirective,
      inputs: ['bafSize'],
    },
    {
      directive: DisabledDirective,
      inputs: ['disabled'],
    },
    {
      directive: WidthDirective,
      inputs: ['bafWidth'],
    },
  ],
})
export class AnchorComponent extends AnchorBase {}

В компоненте определены общие директивы, в которые и вынесена вся логика.

Немного SCSS:

@use 'src/stylesheets/button' as button;
@use 'src/stylesheets/width' as width;

:host {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.5rem;

  border: none;
  box-shadow: none;
  border-radius: 3px;
  cursor: pointer;
  text-decoration: none;

  &.mode-primary {
    @include button.mode(--md-sys-color-primary-container, --md-sys-color-on-primary, --md-sys-color-primary);
  }

  &.mode-secondary {
    @include button.mode(--md-sys-color-secondary-container, --md-sys-color-on-secondary, --md-sys-color-secondary);
  }

  &.mode-tertiary {
    @include button.mode(--md-sys-color-tertiary-container, --md-sys-color-on-tertiary, --md-sys-color-tertiary);
  }

  @include button.disabled();
  @include button.sizes();
  @include width.make-width();
}

Теперь создадим icon-button.

Макет:

<span class="icon-content">
  <ng-content />
</span>
<span class="state-layer"></span>

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

import { DisabledDirective, ExtraSizeDirective, ModeDirective } from '@baf/ui/utils';

import { AnchorBase, ButtonBase } from '../base/button-base';

@Component({
  // eslint-disable-next-line @angular-eslint/component-selector
  selector: 'button[baf-icon-button]',
  standalone: true,
  templateUrl: './icon-button.component.html',
  styleUrl: './icon-button.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  host: {
    class: 'baf-icon-button',
  },
  hostDirectives: [
    {
      directive: ModeDirective,
      inputs: ['bafMode'],
    },
    {
      directive: ExtraSizeDirective,
      inputs: ['bafSize'],
    },
    {
      directive: DisabledDirective,
      inputs: ['disabled'],
    },
  ],
})
export class IconButtonComponent extends ButtonBase {}

@Component({
  // eslint-disable-next-line @angular-eslint/component-selector
  selector: 'a[baf-icon-button]',
  standalone: true,
  templateUrl: './icon-button.component.html',
  styleUrl: './icon-button.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  host: {
    class: 'baf-icon-button',
  },
  hostDirectives: [
    {
      directive: ModeDirective,
      inputs: ['bafMode'],
    },
    {
      directive: ExtraSizeDirective,
      inputs: ['bafSize'],
    },
    {
      directive: DisabledDirective,
      inputs: ['disabled'],
    },
  ],
})
export class IconAnchorComponent extends AnchorBase {}

Стилизуем кнопки:

:host {
  display: inline-flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: center;

  height: 48px;
  width: 48px;
  padding: 4px;
  border: none;
  z-index: 0;
  gap: 8px;
  white-space: nowrap;
  user-select: none;
  background-color: transparent;
  text-decoration: none;

  cursor: pointer;

  border-radius: var(--md-sys-shape-corner-full);

  position: relative;
}

.state-layer {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  display: block;
  z-index: 1;
  opacity: 0;
  border-radius: inherit;
}

.icon-content {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--md-sys-color-on-surface-variant);
  fill: var(--md-sys-color-on-surface-variant);
  line-height: 1;

  :host:hover & {
    color: var(--md-sys-color-on-surface);
    fill: var(--md-sys-color-on-surface);
  }
}

Icons

Добавим компонент для иконок.

mkdir src/app/ui/icons
mkdir src/app/ui/icons/lib
echo >src/app/ui/icons/index.ts

Запускаем команду:

yarn ng g c icon

Переносим его в src/app/ui/title/lib и отредактируем IconComponent:

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

@Component({
  // eslint-disable-next-line @angular-eslint/component-selector
  selector: 'svg[baf-icon]',
  standalone: true,
  imports: [],
  templateUrl: './icon.component.html',
  styleUrl: './icon.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class IconComponent {}

Стили:

src/app/ui/icons/lib/icon/icon.component.scss

Пример использования на иконке домой:

<svg baf-icon xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px">
  <path d="M240-200h120v-240h240v240h120v-360L480-740 240-560v360Zm-80 80v-480l320-240 320 240v480H520v-240h-80v240H160Zm320-350Z" />
</svg>

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

import { IconComponent } from '../icon/icon.component';

@Component({
  selector: 'baf-icon-home',
  standalone: true,
  imports: [IconComponent],
  templateUrl: './home.component.html',
  styleUrl: './home.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class HomeComponent {}

Так же созданы все остальные иконки:

• arrow-down - стрелка вниз;
• arrow-up - стрелка вверх;
• chevron-left - стрелка влево;
• chevron-right - стрелка вправо;
• home - дом;
• logo - лого;
• star - звезда;
• sync-alt - рефреш.

Accordion

Реализуем аккордеон:

mkdir src/app/ui/accordion
mkdir src/app/ui/accordion/lib
echo >src/app/ui/accordion/index.ts

Запускаем команду:

yarn ng g c accordion

Добавим интерфейс:

export interface AccordionItem {
  readonly title: string;
  readonly description: string;
}

В компоненте будем выводить список элементов:

import { CdkAccordionModule } from '@angular/cdk/accordion';
import { ChangeDetectionStrategy, Component, input } from '@angular/core';

import { ArrowDownComponent, ArrowUpComponent } from '@baf/ui/icons';

export interface AccordionItem {
  readonly title: string;
  readonly description: string;
}

@Component({
  selector: 'baf-accordion',
  standalone: true,
  imports: [CdkAccordionModule, ArrowDownComponent, ArrowUpComponent],
  templateUrl: './accordion.component.html',
  styleUrl: './accordion.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class AccordionComponent {
  readonly items = input.required<AccordionItem[]>();
}

Шаблон:

<cdk-accordion>
  @for (item of items(); track item.title; let index = $index) {
    <cdk-accordion-item
      class="accordion"
      #accordionItem="cdkAccordionItem"
      role="button"
      tabindex="0"
      [attr.id]="'accordion-header-' + index"
      [attr.aria-expanded]="accordionItem.expanded"
      [attr.aria-controls]="'accordion-body-' + index"
    >
      <div class="accordion-header" (click)="accordionItem.toggle()">
        @if (accordionItem.expanded) {
          <baf-arrow-down />
        } @else {
          <baf-arrow-up />
        }
        <span> {{ item.title }} </span>
      </div>
      <div
        class="accordion-body"
        role="region"
        [style.display]="accordionItem.expanded ? '' : 'none'"
        [attr.id]="'accordion-body-' + index"
        [attr.aria-labelledby]="'accordion-header-' + index"
      >
        {{ item.description }}
      </div>
    </cdk-accordion-item>
  }
</cdk-accordion>

Стили:

.accordion {
  display: block;

  &:not(:last-child) {
    border-bottom: 1px solid var(--md-sys-color-surface-variant);
    padding-bottom: 1rem;
    margin-bottom: 1rem;
  }
}

.accordion-header {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  line-height: 1;
  user-select: none;
}

.accordion-body {
  padding: 1rem 1rem 0 2rem;
}

Checkbox

Создадим чекбокс.

Отмечу, что оформление я взял из проекта мериалайз

mkdir src/app/ui/checkbox
mkdir src/app/ui/checkbox/lib
echo >src/app/ui/checkbox/index.ts

Запускаем команду:

yarn ng g c checkbox

Разметка:

<label>
  <input type="checkbox" [name]="options().name ?? ''" [formControl]="control()" />
  <span><ng-content /></span>
</label>

Украду немного стилей из Material CSS:

[type='checkbox']:not(:checked),
[type='checkbox']:checked {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

[type='checkbox']:checked {
  + span:before {
    top: -4px;
    left: -5px;
    width: 12px;
    height: 22px;
    border-top: 2px solid transparent;
    border-left: 2px solid transparent;
    border-right: 2px solid var(--md-sys-color-primary);
    border-bottom: 2px solid var(--md-sys-color-primary);
    transform: rotate(40deg);
    backface-visibility: hidden;
    transform-origin: 100% 100%;
  }

  &:disabled + span:before {
    border-right: 2px solid var(--md-sys-color-shadow);
    border-bottom: 2px solid var(--md-sys-color-shadow);
  }
}

[type='checkbox'] {
  + span {
    position: relative;
    padding-left: 35px;
    cursor: pointer;
    display: inline-block;
    height: 25px;
    line-height: 25px;
    font-size: 1rem;
    user-select: none;
  }

  &:not(:checked):disabled + span:before {
    border: none;
    background-color: var(--md-sys-color-shadow);
  }

  // General
  + span:after {
    border-radius: 2px;
  }

  + span:before,
  + span:after {
    content: '';
    left: 0;
    position: absolute;
    /* .1s delay is for check animation */
    transition:
      border 0.25s,
      background-color 0.25s,
      width 0.2s 0.1s,
      height 0.2s 0.1s,
      top 0.2s 0.1s,
      left 0.2s 0.1s;
    z-index: 1;
  }

  // Unchecked style
  &:not(:checked) + span:before {
    width: 0;
    height: 0;
    border: 3px solid transparent;
    left: 6px;
    top: 10px;
    transform: rotateZ(37deg);
    transform-origin: 100% 100%;
  }

  &:not(:checked) + span:after {
    height: 20px;
    width: 20px;
    background-color: transparent;
    border: 2px solid var(--md-sys-color-outline);
    top: 0;
    z-index: 0;
  }

  // Checked style
  &:checked {
    + span:before {
      top: 0;
      left: 1px;
      width: 8px;
      height: 13px;
      border-top: 2px solid transparent;
      border-left: 2px solid transparent;
      border-right: 2px solid var(--md-sys-color-on-primary);
      border-bottom: 2px solid var(--md-sys-color-on-primary);
      transform: rotateZ(37deg);
      transform-origin: 100% 100%;
    }

    + span:after {
      top: 0;
      width: 20px;
      height: 20px;
      border: 2px solid var(--md-sys-color-primary);
      background-color: var(--md-sys-color-primary);
      z-index: 0;
    }
  }

  // Disabled style
  &:disabled:not(:checked) + span:before {
    background-color: transparent;
    border: 2px solid transparent;
  }

  &:disabled:not(:checked) + span:after {
    border-color: transparent;
    background-color: var(--md-sys-color-outline);
  }

  &:disabled:checked + span:before {
    background-color: transparent;
  }

  &:disabled:checked + span:after {
    background-color: var(--md-sys-color-outline);
    border-color: var(--md-sys-color-outline);
  }
}

Сам компонент:

import { ChangeDetectionStrategy, Component, input } from '@angular/core';
import type { FormControl } from '@angular/forms';
import { ReactiveFormsModule } from '@angular/forms';

export interface CheckboxOptions {
  readonly [key: string]: unknown;

  readonly name?: string;
}

@Component({
  selector: 'baf-checkbox',
  standalone: true,
  imports: [ReactiveFormsModule],
  templateUrl: './checkbox.component.html',
  styleUrl: './checkbox.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class CheckboxComponent {
  readonly control = input.required<FormControl<boolean>>();
  readonly options = input<CheckboxOptions>({});
}

Input

Реализуем инпут:

mkdir src/app/ui/input
mkdir src/app/ui/input/lib
echo >src/app/ui/input/index.ts

Выполним инструкцию:

yarn ng g c input

InputComponent будет оберткой над input.

import { ChangeDetectionStrategy, Component, ElementRef, inject } from '@angular/core';
import { NgControl } from '@angular/forms';

@Component({
  // eslint-disable-next-line @angular-eslint/component-selector
  selector: 'input[baf-input]',
  standalone: true,
  imports: [],
  template: '<ng-content/>',
  styleUrl: './input.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  host: {
    class: 'baf-input',
  },
})
export class InputComponent {
  readonly elementRef: ElementRef<HTMLInputElement> = inject(ElementRef);
  readonly ngControl = inject(NgControl);
}

Добавим SCSS:

:host {
  display: block;
  background-color: transparent;
  height: 100%;
  width: 100%;
  padding: 0;
  border: none;
  outline: none;

  &:hover,
  &:focus,
  &:active {
    outline: none;
  }

  &::placeholder {
    color: var(--md-sys-color-on-surface-variant);
  }

  :host-context(.is-invalid) {
    color: var(--md-sys-color-error);
  }
}

Перенесем концепты из mat-form-field:

yarn ng g c input-control

Разметка и стили:

<div class="input-container">
  <ng-content select="[baf-input-prefix]" />
  <div class="input-box">
    <ng-content select="label[baf-label],baf-label" />
    <div class="input">
      <ng-content select="input[baf-input],baf-input" />
    </div>
  </div>
  <ng-content select="[baf-input-suffix]" />
</div>
<ng-content />

:host {
  display: flex;
  flex-direction: column;
  position: relative;
  width: 100%;

  &.is-disabled {
    cursor: not-allowed;
    pointer-events: none;
    color: rgba(var(--md-sys-color-on-surface-rgba), 0.38);

    .input {
      color: rgba(var(--md-sys-color-on-surface-rgba), 0.38);
    }
  }

  &.is-pressed,
  &.is-value {
    .input {
      opacity: 1;
    }
  }
}

.input-box {
  position: relative;
  margin: 0 16px;
  justify-content: center;
  height: 100%;
  flex-grow: 1;
}

.input-container {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  background-color: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
  border-radius: var(--md-sys-shape-corner-extra-small-top);
  height: 3rem;
}

.input {
  opacity: 0;
  height: 100%;
  width: 100%;
  position: relative;
  z-index: 2;
  transition: opacity 0.1s;
  padding: 12px 0 0 0;
}

Возможно можно и разбить на несколько дочерних компонентов, но и так получается достаточно сложно.

Используемые вспомогательные директивы для префиксов и прочего.

src/app/ui/input/lib/input-display.directive.ts:

import { Directive, ElementRef, forwardRef, inject, input } from '@angular/core';
import type { ControlValueAccessor } from '@angular/forms';
import { NG_VALUE_ACCESSOR } from '@angular/forms';

import type { ChangeFn, DisplayFn, TouchedFn } from '@baf/core';

@Directive({
  selector: 'input[formControlName][bafInputDisplay],input[formControl][bafInputDisplay]',
  standalone: true,
  providers: [
    {
      provide: NG_VALUE_ACCESSOR,
      useExisting: forwardRef(() => InputDisplayDirective),
      multi: true,
    },
  ],
  host: {
    '(blur)': 'onTouched()',
    '(input)': 'onInput($event)',
  },
})
export class InputDisplayDirective implements ControlValueAccessor {
  private readonly elementRef = inject(ElementRef<HTMLInputElement>);
  readonly display = input.required<DisplayFn>({ alias: 'bafInputDisplay' });

  onChange!: ChangeFn;
  onTouched!: TouchedFn;

  registerOnChange(fn: ChangeFn): void {
    this.onChange = fn;
  }

  registerOnTouched(fn: TouchedFn): void {
    this.onTouched = fn;
  }

  writeValue(value: unknown): void {
    this.elementRef.nativeElement.value = this.display()(value);
  }

  onInput(event: Event): void {
    const { value } = event.target as HTMLInputElement;
    this.elementRef.nativeElement.value = this.display()(value);
    this.onChange(value);
  }
}

src/app/ui/input/lib/input-mask.directive.ts:

import type { OnInit } from '@angular/core';
import { Directive, ElementRef, forwardRef, inject, InjectionToken, input } from '@angular/core';
import type { ControlValueAccessor } from '@angular/forms';
import { NG_VALUE_ACCESSOR } from '@angular/forms';

import type { ChangeFn, MaskFn, TouchedFn } from '@baf/core';

export const INPUT_MASK_VALUES = new InjectionToken<Record<string, RegExp>>('INPUT_MASK_VALUES');

const DEFAULT_INPUT_MASK_VALUES: Record<string, RegExp> = { 0: /[0-9]/, a: /[a-z]/, A: /[A-Z]/, B: /[a-zA-Z]/ };

export const DEFAULT_MASK_FN: MaskFn = (value) => value;

@Directive({
  selector: 'input[formControlName][bafInputMask],input[formControl][bafInputMask]',
  standalone: true,
  providers: [
    {
      provide: NG_VALUE_ACCESSOR,
      useExisting: forwardRef(() => InputMaskDirective),
      multi: true,
    },
  ],
  host: {
    '(blur)': 'onTouched()',
    '(input)': 'onInput($event)',
  },
})
export class InputMaskDirective implements ControlValueAccessor, OnInit {
  private readonly maskValues = inject(INPUT_MASK_VALUES, { optional: true }) ?? DEFAULT_INPUT_MASK_VALUES;
  private readonly elementRef = inject(ElementRef<HTMLInputElement>);

  private lastValue?: string;

  private readonly maskFormats = `(${Object.keys(this.maskValues)
    .map((key) => {
      const regexStr = this.maskValues[key].toString();

      return regexStr.substring(1, regexStr.length - 1);
    })
    .join('|')})`;

  readonly mask = input.required<string>({ alias: 'bafInputMask' });
  readonly maskFrom = input<MaskFn>(DEFAULT_MASK_FN, { alias: 'bafInputMaskFrom' });
  readonly maskTo = input<MaskFn>(DEFAULT_MASK_FN, { alias: 'bafInputMaskTo' });

  onChange!: ChangeFn;
  onTouched!: TouchedFn;

  registerOnChange(fn: ChangeFn): void {
    this.onChange = fn;
  }

  registerOnTouched(fn: TouchedFn): void {
    this.onTouched = fn;
  }

  writeValue(value: string | undefined | null): void {
    this.elementRef.nativeElement.value = this.getMaskedValue(this.maskTo()(value));
  }

  onInput(event: Event): void {
    const { value } = event.target as HTMLInputElement;
    const masked = this.getMaskedValue(value);
    this.elementRef.nativeElement.value = masked;
    this.onChange(this.maskFrom()(masked));
  }

  ngOnInit(): void {
    if (!this.mask()) {
      console.warn(`Property mask should not be empty for input:`, this.elementRef.nativeElement);
    }
  }

  getMaskedValue(value: string | undefined | null): string | undefined | null {
    if (!this.mask() || !value || value === this.lastValue) {
      return value;
    }

    const masked = this.valueToFormat(value, this.mask(), this.lastValue ? this.lastValue.length > value.length : false, this.lastValue);
    this.lastValue = masked;

    return masked;
  }

  /**
   * @see https://gist.github.com/rami-alloush/3ee792fd0647b73de5f863a2719c78c6
   */
  private valueToFormat(value: string, format: string, goingBack?: boolean, prevValue?: string): string {
    let maskedValue = '';
    const unmaskedValue = value.replace(' ', '').match(new RegExp(this.maskFormats, 'g'))?.join('') ?? '';

    const formats = new RegExp(this.maskFormats);
    const isLastCharFormatter = !formats.test(value[value.length - 1]);
    const isPrevLastCharFormatter = prevValue && !formats.test(prevValue[prevValue.length - 1]);

    let formatOffset = 0;
    for (let index = 0, max = Math.min(unmaskedValue.length, format.length); index < max; ++index) {
      const valueChar = unmaskedValue[index];
      let formatChar = format[formatOffset + index];
      let formatRegex = this.maskValues[formatChar];

      if (formatChar && !formatRegex) {
        maskedValue += formatChar;
        formatChar = format[++formatOffset + index];
        formatRegex = this.maskValues[formatChar];
      }

      if (valueChar && formatRegex) {
        if (formatRegex && formatRegex.test(valueChar)) {
          maskedValue += valueChar;
        } else {
          break;
        }
      }

      const nextFormatChar = format[formatOffset + index + 1];
      const nextFormatRegex = this.maskValues[nextFormatChar];
      const isLastIteration = index === max - 1;

      if (isLastIteration && nextFormatChar && !nextFormatRegex) {
        if (!isLastCharFormatter && goingBack) {
          if (prevValue && !isPrevLastCharFormatter) {
            continue;
          }
          maskedValue = maskedValue.substring(0, formatOffset + index);
        } else {
          maskedValue += nextFormatChar;
        }
      }
    }

    return maskedValue;
  }
}

src/app/ui/input/lib/input-prefix.directive.ts:

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

@Directive({
  selector: '[bafInputPrefix]',
  standalone: true,
  host: {
    class: 'input-prefix',
    '[style.margin-left]': '"12px"',
  },
})
export class InputPrefixDirective {}

src/app/ui/input/lib/input-suffix.directive.ts:

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

@Directive({
  selector: '[bafInputSuffix]',
  standalone: true,
  host: {
    class: 'baf-input-suffix',
    '[style.margin-right]': '"12px"',
  },
})
export class InputSuffixDirective {}

Логика работы достаточно проста:

import type { AfterViewInit, OnDestroy } from '@angular/core';
import { ChangeDetectionStrategy, Component, contentChild, DestroyRef, ElementRef, inject, Renderer2 } from '@angular/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
import type { FormControlStatus } from '@angular/forms';
import { TouchedChangeEvent } from '@angular/forms';
import { filter, startWith, tap } from 'rxjs';

import { LabelComponent } from '@baf/ui/label';

import { InputComponent } from './input.component';

@Component({
  selector: 'baf-input-control',
  templateUrl: './input-control.component.html',
  styleUrls: ['./input-control.component.scss'],
  changeDetection: ChangeDetectionStrategy.OnPush,
  standalone: true,
  host: {
    class: 'baf-input-control',
  },
})
export class InputControlComponent implements AfterViewInit, OnDestroy {
  readonly destroyRef = inject(DestroyRef);
  readonly elementRef: ElementRef<HTMLInputElement> = inject(ElementRef);
  readonly renderer = inject(Renderer2);

  readonly label = contentChild<LabelComponent>(LabelComponent);
  readonly input = contentChild.required<InputComponent>(InputComponent);

  private isDisabled = false;

  ngAfterViewInit(): void {
    const input = this.input();
    if (!input) {
      console.warn('Input[baf-input] not found. Add child <input baf-input /> in <baf-input-control></baf-input-control>');
      return;
    }

    input.elementRef.nativeElement.addEventListener('click', this.onFocusin);
    input.elementRef.nativeElement.addEventListener('focusout', this.onFocusout);
    input.elementRef.nativeElement.addEventListener('input', this.onInput);
    input.elementRef.nativeElement.addEventListener('change', this.onInput);
    this.onInput({ target: input.elementRef.nativeElement });

    input.ngControl.control?.events
      .pipe(
        filter((event) => event instanceof TouchedChangeEvent),
        tap(() => this.check()),
        takeUntilDestroyed(this.destroyRef),
      )
      .subscribe();

    input.ngControl.valueChanges
      ?.pipe(
        tap(() => {
          if (!input.ngControl.value && this.elementRef.nativeElement.classList.contains('is-value')) {
            this.renderer.removeClass(this.elementRef.nativeElement, 'is-value');
          }
          this.onInput({ target: input.elementRef.nativeElement });
        }),
        takeUntilDestroyed(this.destroyRef),
      )
      .subscribe();

    input.ngControl.statusChanges
      ?.pipe(
        startWith(input.ngControl.status),
        tap((status: FormControlStatus) => {
          this.isDisabled = status === 'DISABLED';
          this.disable();
        }),
        takeUntilDestroyed(this.destroyRef),
      )
      .subscribe();
  }

  ngOnDestroy(): void {
    const input = this.input();
    if (!input) {
      return;
    }

    input.elementRef.nativeElement.removeEventListener('click', this.onFocusin);
    input.elementRef.nativeElement.removeEventListener('focusout', this.onFocusout);
    input.elementRef.nativeElement.removeEventListener('input', this.onInput);
    input.elementRef.nativeElement.removeEventListener('change', this.onInput);
  }

  private onFocusin = () => {
    if (!this.isDisabled) {
      this.renderer.addClass(this.elementRef.nativeElement, 'is-pressed');
    }
  };

  private onFocusout = () => {
    if (!this.isDisabled) {
      this.renderer.removeClass(this.elementRef.nativeElement, 'is-pressed');
    }
    this.check();
  };

  private onInput = (event: Event | { target: HTMLInputElement }) => {
    if (!this.isDisabled) {
      const target = event.target as HTMLInputElement;

      if (target.value?.length > 0) {
        this.renderer.addClass(this.elementRef.nativeElement, 'is-value');
      } else {
        this.renderer.removeClass(this.elementRef.nativeElement, 'is-value');
      }

      this.check();
    }
  };

  private disable(): void {
    if (this.isDisabled) {
      this.renderer.addClass(this.elementRef.nativeElement, 'is-disabled');
    } else {
      this.renderer.removeClass(this.elementRef.nativeElement, 'is-disabled');
    }
  }

  private check(): void {
    if (this.input().ngControl.touched) {
      if (this.input().ngControl.errors) {
        this.renderer.addClass(this.elementRef.nativeElement, 'is-invalid');
      } else {
        this.renderer.removeClass(this.elementRef.nativeElement, 'is-invalid');
      }
    }
  }
}

Так как input является потомком, ищем его после рендера и добавляем обработчики:

input.elementRef.nativeElement.addEventListener('click', this.onFocusin);
input.elementRef.nativeElement.addEventListener('focusout', this.onFocusout);
input.elementRef.nativeElement.addEventListener('input', this.onInput);
input.elementRef.nativeElement.addEventListener('change', this.onInput);

Листенеры:

• onFocusin - фосус;
• onFocusout - блюр;
• onInput - ввод значения в input.

Также подписываемся на изменение состояния:

   input.ngControl.control?.events
      .pipe(
        filter((event) => event instanceof TouchedChangeEvent),
        tap(() => this.check()),
        takeUntilDestroyed(this.destroyRef),
      )
      .subscribe();

    input.ngControl.valueChanges
      ?.pipe(
        tap(() => {
          if (!input.ngControl.value && this.elementRef.nativeElement.classList.contains('is-value')) {
            this.renderer.removeClass(this.elementRef.nativeElement, 'is-value');
          }
          this.onInput({ target: input.elementRef.nativeElement });
        }),
        takeUntilDestroyed(this.destroyRef),
      )
      .subscribe();

    input.ngControl.statusChanges
      ?.pipe(
        startWith(input.ngControl.status),
        tap((status: FormControlStatus) => {
          this.isDisabled = status === 'DISABLED';
          this.disable();
        }),
        takeUntilDestroyed(this.destroyRef),
      )
      .subscribe();

Autocomplete

Реализуем autocomplete:

mkdir src/app/ui/autocomplete
mkdir src/app/ui/autocomplete/lib
echo >src/app/ui/autocomplete/index.ts

Выполним команду:

yarn ng g c autocomplete

Разметка и стили:

<baf-input-control cdkOverlayOrigin #trigger="cdkOverlayOrigin">
  <label baf-label [attr.for]="options().id">{{ options().label }}</label>
  <input
    #input
    baf-input
    type="text"
    [bafInputDisplay]="options().inputDisplayFn"
    [id]="options().id"
    [formControl]="control()"
    [placeholder]="options().placeholder ?? ''"
    (click)="onOpen()"
    (input)="onInput($event)"
  />
</baf-input-control>

<ng-template
  cdkConnectedOverlay
  [cdkConnectedOverlayOrigin]="trigger"
  [cdkConnectedOverlayOpen]="open()"
  [cdkConnectedOverlayWidth]="width"
  [cdkConnectedOverlayOffsetY]="1"
  (overlayOutsideClick)="onClose()"
>
  <div class="autocomplete-overlay">
    @for (option of data() | async; track option.id; let index = $index) {
      <a class="autocomplete-option" [innerHTML]="options().displayFn(option, index)" (click)="onSelect(option)"></a>
    }
  </div>
</ng-template>

.autocomplete-overlay {
  background-color: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface-variant);
  width: 100%;
  padding: 1rem;
  border-radius: 0.25rem;
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.autocomplete-option {
  text-decoration: none;
  padding: 0.5rem;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;

  &:not(:last-child) {
    border-bottom: 1px solid var(--md-sys-color-surface);
  }

  &:hover {
    color: var(--md-sys-color-primary-container);
  }
}

Логика компонента:

import { CdkConnectedOverlay, CdkOverlayOrigin } from '@angular/cdk/overlay';
import { AsyncPipe, NgForOf } from '@angular/common';
import type { Signal } from '@angular/core';
import { ChangeDetectionStrategy, Component, ElementRef, input, output, signal, viewChild } from '@angular/core';
import type { FormControl } from '@angular/forms';
import { ReactiveFormsModule } from '@angular/forms';
import type { Observable } from 'rxjs';
import { take, tap } from 'rxjs';

import type { DisplayFn } from '@baf/core';
import { InputComponent, InputControlComponent, InputDisplayDirective } from '@baf/ui/input';
import { LabelComponent } from '@baf/ui/label';

// eslint-disable-next-line @typescript-eslint/no-explicit-any
export type AutocompleteVariant = Record<string, any> & { readonly id: number | string };

export interface AutocompleteOptions {
  readonly label: string;
  readonly placeholder?: string;
  readonly id: string;
  readonly key: string;
  readonly displayFn: DisplayFn;
  readonly inputDisplayFn: DisplayFn;
}

@Component({
  selector: 'baf-autocomplete',
  standalone: true,
  imports: [
    ReactiveFormsModule,
    CdkConnectedOverlay,
    CdkOverlayOrigin,
    InputComponent,
    NgForOf,
    AsyncPipe,
    InputControlComponent,
    InputDisplayDirective,
    LabelComponent,
  ],
  templateUrl: './autocomplete.component.html',
  styleUrl: './autocomplete.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  host: {
    class: 'baf-input-control',
  },
})
export class AutocompleteComponent {
  readonly control = input.required<FormControl<string | AutocompleteVariant>>();
  readonly options = input.required<AutocompleteOptions>();
  readonly data = input.required<Observable<AutocompleteVariant[]>>();

  readonly changed = output<string>();
  readonly opened = output();
  readonly closed = output();

  readonly input: Signal<ElementRef<HTMLInputElement>> = viewChild.required('input', { read: ElementRef<HTMLInputElement> });

  readonly open = signal<boolean>(false);

  get width(): string {
    return this.input().nativeElement.clientWidth > 200 ? `${this.input().nativeElement.clientWidth}px` : '200px';
  }

  onOpen(): void {
    if (!this.open()) {
      this.open.set(true);
      this.opened.emit();
    }
  }

  onClose(): void {
    this.closed.emit();
    this.open.set(false);

    this.data()
      .pipe(
        take(1),
        tap((options) => {
          if (
            options.length &&
            this.control().value &&
            (typeof this.control().value === 'string' || JSON.stringify(this.control().value) !== JSON.stringify(options[0]))
          ) {
            this.control().patchValue(options[0], { emitEvent: false });
          }
        }),
      )
      .subscribe();
  }

  onInput(event: Event): void {
    this.changed.emit((event.target as HTMLInputElement).value);
  }

  onSelect(option: AutocompleteVariant): void {
    this.control().patchValue(option, { emitEvent: false });
    this.closed.emit();
    this.open.set(false);
  }
}

Суть работы следующая:

• при клике на поле показать выпадающее окно;
• при вводе значений, вывести подсказки.

Методы:

• onOpen - показать окно;
• onInput - ввод значения;
• onSelect - выбор подсказки;
• onClose - событие закрытия.

Показанных компонентов достаточно, чтобы перейти к разработке страниц.

Ссылки

Все исходники находятся на github, в репозитории - github.com/Fafnur/buy-and-fly

Демо можно посмотреть здесь - buy-and-fly.fafn.ru/

Мои группы: telegram, medium, vk, x.com, linkedin, site

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