Angular 2/4/6/8 Multiselect Dropdown

Angular 2 multiselect dropdown component for web applications. Easy to integrate and use.

Important Notice !!

From v3.0.0 onwards, you need to include default.theme.css file to get the basic styling of the dropdown. Refer to themes and theming section below

Documentation | Demos / Examples.

Table of Contents

1. Getting Started

2. Installation

3. Usage

4 Theming

5. Templates

6. Template Driven Forms support

7. Reactive Forms support

8. Settings configuration

9. Callbacks and events

10. Lazy lodaing - handle large data lists

11. Group By feature

12. Search filter for both plain list and grouped list

13. Custom Search / Search API

Getting Started

Installation

• The Mutiselect Dropdown package is published on the npm Registry.

• Install the package : npm install angular2-multiselect-dropdown

• Once installed import AngularMultiSelectModule from the installed package into your module as follows:

Usage

Import AngularMultiSelectModule into NgModule in app.module.ts. Angular's FormsModule is also required.

import { AngularMultiSelectModule } from 'angular2-multiselect-dropdown';
import { FormsModule } from '@angular/forms';

@NgModule({
  // ...
  imports: [
    AngularMultiSelectModule,
    FormsModule
  ]
  // ...
})

Declare the component data variables and options in your component where you want to consume the dropdown component.

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

export class AppComponent implements OnInit {
    dropdownList = [];
    selectedItems = [];
    dropdownSettings = {};
    ngOnInit(){
        this.dropdownList = [
                              {"id":1,"itemName":"India"},
                              {"id":2,"itemName":"Singapore"},
                              {"id":3,"itemName":"Australia"},
                              {"id":4,"itemName":"Canada"},
                              {"id":5,"itemName":"South Korea"},
                              {"id":6,"itemName":"Germany"},
                              {"id":7,"itemName":"France"},
                              {"id":8,"itemName":"Russia"},
                              {"id":9,"itemName":"Italy"},
                              {"id":10,"itemName":"Sweden"}
                            ];
        this.selectedItems = [
                                {"id":2,"itemName":"Singapore"},
                                {"id":3,"itemName":"Australia"},
                                {"id":4,"itemName":"Canada"},
                                {"id":5,"itemName":"South Korea"}
                            ];
        this.dropdownSettings = { 
                                  singleSelection: false, 
                                  text:"Select Countries",
                                  selectAllText:'Select All',
                                  unSelectAllText:'UnSelect All',
                                  enableSearchFilter: true,
                                  classes:"myclass custom-class"
                                };            
    }
    onItemSelect(item:any){
        console.log(item);
        console.log(this.selectedItems);
    }
    OnItemDeSelect(item:any){
        console.log(item);
        console.log(this.selectedItems);
    }
    onSelectAll(items: any){
        console.log(items);
    }
    onDeSelectAll(items: any){
        console.log(items);
    }
}

Add the following component tag in you template

<angular2-multiselect [data]="dropdownList" [(ngModel)]="selectedItems" 
    [settings]="dropdownSettings" 
    (onSelect)="onItemSelect($event)" 
    (onDeSelect)="OnItemDeSelect($event)"
    (onSelectAll)="onSelectAll($event)"
    (onDeSelectAll)="onDeSelectAll($event)"></angular2-multiselect>

Themes and Theming

• From v3.0.0 onwards, you need to include default.theme.css file to get the basic styling of the dropdown.
• The component package has a themes folder in node_modules at angular2-multiselect-dropdown\themes\default.theme.css
• Include the default.theme.css in angular-cli.json (for versions below angular 6) and angular.json (for version 6 or more).
• Refer this file on how to add the css file to your angular project.

You can create your own theme from now on. You can have a look at example scss theming file at Default theme

Template - For custom html of menu item

<angular2-multiselect [data]="dropdownList" [(ngModel)]="selectedItems" [settings]="dropdownSettings">
  <c-item>
          <ng-template let-item="item">
            <label style="color: #333;min-width: 150px;">{{item.itemName}}</label>
            <img [src]="item.image" style="width: 30px; border: 1px solid #efefef;margin-right: 20px;" />
            <label>Capital - {{item.capital}}</label>
          </ng-template>
  </c-item>    
</angular2-multiselect>

Template - For custom html of Selected item - badge

<angular2-multiselect [data]="dropdownList" [(ngModel)]="selectedItems" [settings]="dropdownSettings">
  <c-badge>
           <ng-template let-item="item">
            <label style="margin: 0px;">{{item.itemName}}</label>
            <img [src]="item.image" style="width: 16px; margin-right: 5px;" />
           </ng-template>
  </c-badge>  
</angular2-multiselect>

Template Driven Forms support

<form (ngSubmit)="onSubmit()" #loginForm="ngForm" style="border: 1px solid #ccc; padding: 10px;">
        <div class="form-group">
            <label for="name">Skills</label>
            <angular2-multiselect [data]="itemList" [(ngModel)]="formModel.skills" 
                                  [settings]="settings" 
                                  (onSelect)="onItemSelect($event)"
                                  (onDeSelect)="OnItemDeSelect($event)" 
                                  (onSelectAll)="onSelectAll($event)" 
                                  (onDeSelectAll)="onDeSelectAll($event)" name="skills">
            </angular2-multiselect>
        </div>
</form>

formModel = {
        name: '',
        email: '[email protected]',
        skills: [{ "id": 1, "itemName": "Angular" }]
    };

Reactive Forms support

<form [formGroup]="userForm" novalidate style="border: 1px solid #ccc; padding: 10px;">
        <div class="form-group">
            <label for="name">Skills</label>
           <angular2-multiselect [data]="itemList" [(ngModel)]="selectedItems" 
                                  [settings]="settings" 
                                  (onSelect)="onItemSelect($event)"
                                  (onDeSelect)="OnItemDeSelect($event)" 
                                  (onSelectAll)="onSelectAll($event)" 
                                  (onDeSelectAll)="onDeSelectAll($event)" formControlName="skills">
            </angular2-multiselect>
        </div>
</form>

userForm: FormGroup;
this.userForm = this.fb.group({
            name: '',
            email: ['', Validators.required],
            skills: [[], Validators.required]
        });

Settings

The following list of settings are supported by the component. Configure the settings to meet your requirement.

Events

• onSelect - Return the selected item on selection. Example : (onSelect)="onItemSelect($event)"
• onDeSelect - Return the un-selected item on un-selecting. Example : (onDeSelect)="OnItemDeSelect($event)"
• onSelectAll - Return the list of all selected items. Example : (onSelectAll)="onSelectAll($event)"
• onDeSelectAll - Returns an empty array. Example : (onDeSelectAll)="onDeSelectAll($event)"
• onGroupSelect - Returns the selected group items as an array. Example: (onGroupSelect)="onGroupSelect($event)"
• onGroupDeSelect - Returns the sun-elected group items as an array. Example: (onGroupDeSelect)="onGroupDeSelect($event)"
• onOpen - Callback method fired after the dropdown opens Example : (onOpen)="onOpen($event)"
• onClose - Callback method, fired when the dropdown is closed Example : (onClose)="onClose($event)"
• onScrollToEnd - Callback event fired when the dropdown list is scrolled to the end. Usually used with virtual scrolling, to load data on scroll. Example : (onScrollToEnd)="fetchMore($event)"
• onAddFilterNewItem - Callback event fired when you click the Add button which will appear when addNewItemOnFilter setting is enabled. Example : (onAddFilterNewItem)="onAddItem($event)"
• onFilterSelectAll - Callback event fired when the list is filtered and all filtered items are selected with select all filtered items checkbox. Example : (onFilterSelectAll)="onFilterSelectAll($event)"
• onFilterDeSelectAll - Callback event fired when the list is filtered and all filtered items are de-selected with de-select all filtered items checkbox. Example : (onFilterDeSelectAll)="onFilterDeSelectAll($event)"

Run locally

• Clone the repository or downlod the .zip,.tar files.
• Run npm install
• Run ng serve for a dev server
• Navigate to http://localhost:4200/ The app will automatically reload if you change any of the source files.

License

MIT License.