Overview

A multiselect dropdown component for angular applications. Developed in Angular 2, its easy to install and integrate.

Features

• Dropdown with multiselect.
• Filter list.
• Checkboxes.
• Check all feature.
• Single selection mode.
• Highly configurable.

Getting Started

To get started with using the multiselect dropdown component, follow the below steps. It’s easy to integrate and just a matter of minutes.

IMPORTANT !!

From v3.0.0 onwards you need to include default.themes.css file or create your theme and add it. Refer to theme section below

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

import { AngularMultiSelectModule } from 'angular2-multiselect-dropdown';

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

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>

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;"></label>
            <img [src]="item.image" style="width: 30px; border: 1px solid #efefef;margin-right: 20px;" />
            <label>Capital - </label>
          </ng-template>
  </c-item>    
</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

Using with Template Driven Forms

Include the dropdown tag in the form html as follows

<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>

Initiatie the formModel as below:

formModel = {
        name: null,
        email: '',
        skills: []
};

Using with Reactive Forms

Incluse the dropdwon in reactive form way as below

<form [formGroup]="userForm" novalidate>
        <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>
        <div class="form-group">
            <label for="name">Name</label>
            <input class="form-control" formControlName="name">
        </div>
        <div class="form-group">
            <label for="name">Email Address</label>
            <input class="form-control" formControlName="email">
        </div>
        <button (click)="submitForm()" [disabled]="!userForm.valid" class="btn btn-success btn-block">Submit</button>
</form>

Initiate the form using formGroup module as below:

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

Configuration 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)”
• 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)”

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/

License

MIT License.