Implementing the Syncfusion Angular MultiSelect Dropdown

The MultiSelect Dropdown (

ejs-multiselect

) allows users to select one or more values from a predefined list. It supports four visual modes (Default/Box/Delimiter/CheckBox), rich filtering, templates, grouping, remote data, virtualization, and full Angular form integration.

Component Overview

Mode	Behavior	Use When
`Default`	Selected items shown as chips in input	Standard multi-select
`Box`	Same as Default, explicit box display	Visual clarity needed
`Delimiter`	Selected items as comma-separated text	Space-constrained layouts
`CheckBox`	Popup shows checkboxes per item	Bulk selection workflows

Navigation Guide

Getting Started

📄 Read: references/getting-started.md

Installation and package setup (
```
ng add
```
)
CSS imports and theme configuration
Basic
```
<ejs-multiselect>
```
in standalone Angular component
Popup height/width configuration
Angular version notes (standalone default in Angular 19+)

Data Binding & Value Binding

📄 Read: references/data-binding.md

Local arrays (strings, numbers, objects)
```
fields
```
mapping:
```
text
```
,
```
value
```
,
```
groupBy
```
,
```
iconCss
```
,
```
disabled
```
Remote data with DataManager (OData, Web API)
Pre-selecting values programmatically
Object binding with
```
allowObjectBinding
```

Selection Modes, Chips & Item Control

📄 Read: references/selection-modes.md

```
mode
```
property: Default / Box / Delimiter / CheckBox

CheckBox mode:

CheckBoxSelection

showSelectAll

maximumSelectionLength

Chip customization via
```
tagging
```
event
Custom values with
```
allowCustomValue
```
Disabling specific items:
```
fields.disabled
```
,
```
disableItem()
```
```
addTagOnBlur
```
and
```
changeOnBlur
```
behaviors

Filtering

📄 Read: references/filtering.md

Enabling
```
allowFiltering
```
+
```
filtering
```
event +
```
updateData()
```
```
filterType
```
:
```
startsWith
```
,
```
contains
```
,
```
endsWith
```
Minimum character threshold before query fires
Remote filtering with DataManager
Case-insensitive matching

Templates

📄 Read: references/templates.md

```
itemTemplate
```
— custom list item rendering with
```
ng-template
```
```
valueTemplate
```
— customize chip/selected value display
```
groupTemplate
```
— custom group header content
```
headerTemplate
```
/
```
footerTemplate
```
— popup top/bottom
```
noRecordsTemplate
```
/
```
actionFailureTemplate
```

Grouping & Cascading

📄 Read: references/grouping-and-items.md

```
fields.groupBy
```
— organize items into categories
Fixed vs inline group headers
```
enableGroupCheckBox
```
for group-level Select All
Cascading MultiSelect: parent
```
change
```
event → filter child data
Country → State → City cascade pattern

Form Integration

📄 Read: references/form-support.md

Template-driven forms:
```
FormsModule
```
,
```
ngModel
```
, two-way binding
Reactive forms:
```
ReactiveFormsModule
```
,
```
FormGroup
```
,
```
FormControl
```
```
formControlName
```
usage and validation
Required field and custom validator patterns

Advanced Features

📄 Read: references/advanced-features.md

Virtualization for large datasets (
```
enableVirtualization
```
)
Popup resize (
```
allowResize
```
, resize events)
Icons in list items (
```
iconCss
```
field)
Localization (
```
L10n.load()
```
, locale key overrides)
Accessibility: WAI-ARIA, keyboard navigation, WCAG 2.2
RTL support

API Reference

📄 Read: references/api.md

Complete list of all properties with types and defaults
All public methods with signatures, parameters, and return types
All events with argument types and usage examples
Module injection notes (
```
CheckBoxSelectionService
```
)

Quick Start

bash

ng add @syncfusion/ej2-angular-dropdowns

typescript

// app.component.ts — Standalone Angular 19+
import { Component } from '@angular/core';
import { MultiSelectModule } from '@syncfusion/ej2-angular-dropdowns';

@Component({
  standalone: true,
  imports: [MultiSelectModule],
  selector: 'app-root',
  template: `
    <ejs-multiselect
      [dataSource]="skills"
      [fields]="fields"
      placeholder="Select skills"
      [(value)]="selectedSkills"
      (change)="onChange($event)">
    </ejs-multiselect>
  `
})
export class AppComponent {
  public skills = [
    { id: 1, name: 'Angular' },
    { id: 2, name: 'React' },
    { id: 3, name: 'TypeScript' },
    { id: 4, name: 'Node.js' },
  ];
  public fields = { text: 'name', value: 'id' };
  public selectedSkills: number[] = [1, 3]; // pre-select Angular & TypeScript

  onChange(args: any): void {
    console.log('Selected IDs:', args.value);
  }
}

css

/* styles.css */
@import '@syncfusion/ej2-base/styles/material3.css';
@import '@syncfusion/ej2-buttons/styles/material3.css';
@import '@syncfusion/ej2-inputs/styles/material3.css';
@import '@syncfusion/ej2-lists/styles/material3.css';
@import '@syncfusion/ej2-popups/styles/material3.css';
@import '@syncfusion/ej2-dropdowns/styles/material3.css';
@import '@syncfusion/ej2-angular-dropdowns/styles/material3.css';

Common Patterns

Checkbox Mode with Select All

typescript

import { MultiSelectModule, CheckBoxSelectionService } from '@syncfusion/ej2-angular-dropdowns';

@Component({
  standalone: true,
  imports: [MultiSelectModule],
  providers: [CheckBoxSelectionService],
  template: `
    <ejs-multiselect
      [dataSource]="items"
      mode="CheckBox"
      [showSelectAll]="true"
      selectAllText="Select All"
      unSelectAllText="Unselect All"
      [maximumSelectionLength]="5">
    </ejs-multiselect>
  `
})

Filtering with Remote Data

typescript

template: `
  <ejs-multiselect
    [dataSource]="data"
    [allowFiltering]="true"
    filterType="contains"
    (filtering)="onFilter($event)">
  </ejs-multiselect>
`

onFilter(args: FilteringEventArgs): void {
  const query = new Query().where('name', 'contains', args.text, true);
  args.updateData(this.data, query);
}

Reactive Form Integration

typescript

import { ReactiveFormsModule, FormControl } from '@angular/forms';

// In component:
public skillsControl = new FormControl([1, 3]); // pre-selected IDs

// In template:
// <ejs-multiselect [formControl]="skillsControl" [dataSource]="skills" [fields]="fields">
// </ejs-multiselect>

Key Props

Property	Type	Purpose
`dataSource`	`any[] \| DataManager`	Items to display
`fields`	`FieldSettingsModel`	Maps `text` , `value` , `groupBy` , `disabled` , `iconCss`
`value`	`any[]`	Currently selected values (use `[(value)]` for two-way)
`mode`	`string`	`Default` , `Box` , `Delimiter` , `CheckBox`
`allowFiltering`	`boolean`	Enables search within the dropdown
`filterType`	`string`	`startsWith` , `contains` , `endsWith`
`showSelectAll`	`boolean`	Shows Select All in CheckBox mode
`maximumSelectionLength`	`number`	Caps the number of selectable items
`allowCustomValue`	`boolean`	Lets users add values not in the list
`enableVirtualization`	`boolean`	Optimizes rendering for large lists
`popupHeight` / `popupWidth`	`string`	Constrains popup dimensions
`allowResize`	`boolean`	Lets users drag-resize the popup
`placeholder`	`string`	Input hint text

syncfusion-angular-multi-select

NPX Install

Tags

SKILL.md Content

Implementing the Syncfusion Angular MultiSelect Dropdown

Component Overview

Navigation Guide

Getting Started

Data Binding & Value Binding

Selection Modes, Chips & Item Control

Filtering

Templates

Grouping & Cascading

Form Integration

Advanced Features

API Reference

Quick Start

Common Patterns

Checkbox Mode with Select All

Filtering with Remote Data

Reactive Form Integration

Key Props