@stackline/angular-multiselect-dropdown

Angular multiselect dropdown for Angular 22 with maintained release lines, accessibility-focused and keyboard/ARIA tested interactions, dialog-safe body overlays, Stackline skins, search, grouping, templates, headless helpers, and forms support.

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Current package version: 22.1.4

The original angular2-multiselect-dropdown package became difficult to keep current across multiple Angular generations. This maintained package keeps the classic API and template structure intact, introduces the new primary selector <angular-multiselect>, preserves the legacy alias <angular2-multiselect>, and publishes the project line by line so older applications can keep a predictable upgrade path.

The repository contains the full documentation matrix from Angular 2 through Angular 22. Runtime behavior was tested with 22.1.2 for Angular 22.x applications; this documentation-only release preserves those runtime files.

The Angular 22 package is compatible with Angular 22.x and was tested in a real Angular 22.1.3 application before publication. The 22.1.0 peer range is intentionally open through Angular 23.x (>=22.0.0 <24.0.0) so Angular 23 projects can install it while the Angular 23-specific validation line is prepared. The 22.1.x line keeps the Angular 21.2.x behavior baseline: accessibility-focused keyboard navigation, focus handling, and ARIA support for the dropdown trigger, clear-all action, selected chips, listbox, and lazy-loaded results. It carries the React 19.1.x combobox contract into Angular patterns: configurable keyboard behavior, matching aria-selected plus aria-checked, selected-object preservation across async data refreshes, richer template contexts, and renderless state helpers for custom Angular HTML.

• new package: @stackline/angular-multiselect-dropdown
• previous package: @stackline/angular2-multiselect-dropdown
• primary selector: <angular-multiselect>
• legacy alias still accepted only for compatibility: <angular2-multiselect>

Each package family only installs on its matching Angular family. Framework major and package major are not always the same package number, so use the package family column below.

Peer ranges are normally bounded to the tested Angular major. The Angular 22 line is the exception: it uses >=22.0.0 <24.0.0 so Angular 23 projects can install the package on launch day while the dedicated Angular 23 validation line is prepared. Angular 21 stays on >=21.0.0 <22.0.0.

npm install @stackline/angular-multiselect-dropdown@22.1.4 --save-exact

Install 22.1.2 for Angular 22.x applications. This release keeps the tested Angular behavior and the Angular 23-compatible peer range, updates the build and test baseline to Angular 22.1, ignores prototype-mutation keys in settings/template contexts, and makes headless limitSelection match the visual component. It keeps <angular-multiselect> as the documented selector and <angular2-multiselect> as a compatibility alias.

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { AngularMultiSelectModule } from '@stackline/angular-multiselect-dropdown';

@NgModule({
  imports: [
    BrowserModule,
    FormsModule,
    AngularMultiSelectModule
  ]
})
export class AppModule {}

"styles": [
  "node_modules/@stackline/angular-multiselect-dropdown/themes/default.theme.css"
]

dropdownList = [
  { id: 1, itemName: 'Brazil' },
  { id: 2, itemName: 'Canada' },
  { id: 3, itemName: 'Portugal' },
  { id: 4, itemName: 'United States' },
  { id: 5, itemName: 'Argentina' },
  { id: 6, itemName: 'Germany' },
  { id: 7, itemName: 'Japan' },
  { id: 8, itemName: 'South Africa' }
];

selectedItems = [{ id: 2, itemName: 'Canada' }];

dropdownSettings = {
  singleSelection: false,
  text: 'Classic basic',
  selectAllText: 'Select all',
  unSelectAllText: 'Clear all',
  enableSearchFilter: true,
  searchPlaceholderText: 'Search',
  badgeShowLimit: 4,
  maxHeight: 260,
  showCheckbox: true,
  noDataLabel: 'No data',
  skin: 'classic',
  tagToBody: false
};

<angular-multiselect
  [data]="dropdownList"
  [(ngModel)]="selectedItems"
  [settings]="dropdownSettings"
  (onSelect)="onItemSelect($event)"
  (onDeSelect)="onItemDeSelect($event)"
  (onSelectAll)="onSelectAll($event)"
  (onDeSelectAll)="onDeSelectAll($event)">
</angular-multiselect>

See the security policy for supported release lines and private vulnerability reporting.

Keep framework peers and application dependencies patched. Dependency audits cover known advisories; they do not establish that an application is secure.

Option identifier normalization trims adversarial runs in linear time while preserving the existing identifier and selection contract.

The editable StackBlitz entry is one Angular 22 playground with isolated lazy routes. Official links use stackblitz.com/github against the maintained GitHub repository, so they stay tied to the latest pushed source instead of creating stale forked copies for every example. Each example has its own folder, Angular module, data object, and URL.

The package also ships a full custom starter theme in both formats:

• node_modules/@stackline/angular-multiselect-dropdown/themes/custom.theme.scss
• node_modules/@stackline/angular-multiselect-dropdown/themes/custom.theme.css

Use the scss file when you want to take over the component styles completely and keep the theme in your app source:

"styles": [
  "src/styles.scss",
  "src/styles/multiselect-dropdown.theme.scss"
]

Start src/styles/multiselect-dropdown.theme.scss from the package file above and edit the selectors and tokens freely.

Use the css file when you want a plain compiled starter that can be copied and adjusted without a Sass pipeline.

The Angular 22 release was tested in a real Angular 22.1.3 application with @stackline/angular-multiselect-dropdown@22.1.4. The docs use the same example pattern from the clean test app, including the accessibility-focused keyboard, focus, and ARIA behavior, responsive dropdown width handling, opaque menu surfaces, and dialog-safe positioning carried forward from the Angular 21.2.x line.

Switch between skins through the settings object:

settings = {
  text: 'Classic basic',
  skin: 'classic'
};

materialSettings = {
  text: 'Material basic',
  skin: 'material'
};

settings.theme is still accepted as a legacy alias for older code, but new Angular usage should configure only settings.skin.

The same twelve scenarios are validated for both classic and material:

The Angular line follows the same combobox contract validated in the React 19.1.x work, but exposed through Angular settings:

dropdownSettings = {
  text: 'Keyboard-tested countries',
  enableSearchFilter: true,
  searchAutofocus: false,
  keyboard: {
    space: true,
    spaceOptionAction: 'toggle',
    tab: true,
    arrows: true,
    escape: true,
    backspaceRemovesLastWhenSearchEmpty: false,
    deleteRemovesFocusedBadge: true
  }
};

Default behavior:

• Space on the trigger opens or closes the dropdown.
• Space on an option toggles that option and keeps focus on it.
• Search inputs type a normal space.
• Tab moves focus and never selects an option.
• Escape closes the list without clearing selected values.
• Empty-search Backspace does not remove selected values by default.
• Focused badge/remove buttons can remove intentionally with Backspace/Delete.
• Options expose matching aria-selected and aria-checked values.

<angular-multiselect
  [data]="dropdownList"
  [(ngModel)]="selectedItems"
  [settings]="dropdownSettings">
  <c-item>
    <ng-template
      let-item="item"
      let-label="label"
      let-selected="selected"
      let-ariaChecked="ariaChecked">
      <span [attr.data-aria-checked]="ariaChecked">
        {{ label }}
        <strong *ngIf="selected">Selected</strong>
      </span>
    </ng-template>
  </c-item>
</angular-multiselect>

<angular2-multiselect> remains available only as a legacy compatibility alias for applications migrating from the old outdated plugin. New code and all current examples should use <angular-multiselect>.

Use AngularMultiselectState when you want Stackline selection, filtering, item identity, object preservation, and ARIA state while owning all HTML yourself.

import {
  AngularMultiselectState,
  defineAngularMultiselectSettings
} from '@stackline/angular-multiselect-dropdown';

interface CountryOption {
  id: number;
  itemName: string;
  region: string;
}

state = new AngularMultiselectState<CountryOption>({
  data: countries,
  selectedItems: [countries[0]],
  settings: defineAngularMultiselectSettings<CountryOption>({
    primaryKey: 'id',
    labelKey: 'itemName',
    searchBy: ['itemName', 'region'],
    ariaLabel: 'Headless country picker'
  }),
  onChange: (items) => {
    selectedItems = items;
  }
});

The docs include a Headless + ARIA route that binds the returned trigger, listbox, and option state into fully custom Angular HTML.

<form #form="ngForm">
  <angular-multiselect
    [data]="skills"
    [(ngModel)]="selectedSkills"
    [settings]="settings"
    name="skills"
    required>
  </angular-multiselect>
</form>

<form [formGroup]="userForm">
  <angular-multiselect
    [data]="skills"
    [settings]="settings"
    formControlName="skills">
  </angular-multiselect>
</form>

Enable lazy loading through the settings object and respond to the scroll event from your container logic:

settings = {
  text: 'Select Items',
  enableSearchFilter: true,
  lazyLoading: true,
  labelKey: 'name',
  primaryKey: 'id'
};

The versioned docs include working examples for lazy loading, remote data, grouping, templating, and forms usage.

For sticky cards, constrained containers, or dashboard layouts, keep tagToBody: false so the dropdown panel stays anchored to the field and does not jump across the page.

Use tagToBody: true when the dropdown is inside Angular Material dialogs, modals, drawers, or containers that set overflow: hidden or overflow: auto.

settings = {
  text: 'Select countries',
  enableSearchFilter: true,
  skin: 'material',
  tagToBody: true
};

In the current 22.1.x line, tagToBody: true renders the open panel outside clipping containers, keeps it aligned to the original trigger, keeps the menu surface opaque, recalculates position on scroll and resize, and cleans it up on close or destroy. appendToBody: true is also accepted as an alias for teams that prefer that name.

The classic output contract is preserved:

• (onSelect)
• (onDeSelect)
• (onSelectAll)
• (onDeSelectAll)
• (onAddFilterNewItem)

Use Node 24.20.0 and npm 11.19.0 for reproducible release artifacts.

npm ci
npm run docs:sync

npm run check builds the library and checks its public package contents and existing behavior. The existing npm run test:ci command runs application and library tests in headless Chrome.

• Run npm ci, npm run check, and the applicable browser or consumer checks.
• Review npm audit and npm audit --omit=dev separately.
• Review the packed README, declarations, exports, license, and compatibility metadata.
• Publish through the GitHub Actions workflow using the tested artifact's SHA-512 digest.
• Verify the exact npm tarball, version, and GitHub provenance after publication; never replace a published version.

MIT

• Pradeep Terli.
• Copyright (c) 2016 Cuppa Labs.
• Stackline maintenance: Alexandro Paixao Marques and Stackline contributors.

Original copyright, license notices and contributor acknowledgements remain part of this distribution. Stackline maintenance does not replace authorship of the original work.

• Stackline website
• GitHub projects
• npm packages
• Reddit community — r/Stackline
• Maintainer LinkedIn

Use this repository's issue tracker for reproducible bugs and feature requests. Join r/Stackline for examples, usage questions and release discussions.