Ngx-nestable-ukguyx NPM

ngx-nestable

Nestable list for Angular4 and beyond. This is a Angular adaptation of Jquery Nestable library. Demo

Features

Drag and Drop
Sorting
Events (drag, drop, over, out) // TODO
Nesting
Touch support // TODO

Instalation

npm i ngx-nestable --save

Implementation

app.module.ts

import { NestableModule } from 'ngx-nestable';

@NgModule({
  imports: [NestableModule],
  bootstrap: [AppComponent]
})
export class AppModule {}

app.component.ts

  public options = {
    fixedDepth: true
  } as NestableSettings;
  public list = [
    { 'id': 1 },
    {
      'expanded': true,
      'id': 2, 'children': [
        { 'id': 3 },
        { 'id': 4 },
        {
          'expanded': false,
          'id': 5, 'children': [
            { 'id': 6 },
            { 'id': 7 },
            { 'id': 8 }
          ]
        },
        { 'id': 9 },
        { 'id': 10 }
      ]
    },
    { 'id': 11 }
  ];

app.html

  <ngx-nestable [(list)]="list" [options]="options" [template]="itemTemplate">
  </ngx-nestable>
  
  <ng-template #itemTemplate let-row>
    <button mat-icon-button [ngxNestableDragHandle]="row">
      <mat-icon>drag_handle</mat-icon>
    </button>
    
    <button mat-icon-button *ngIf="row.item.children && row.item.children.length; else empty_item" [ngxNestableExpandCollapse]="row">
      <mat-icon>{{row.item.$$expanded ? 'keyboard_arrow_down' : 'keyboard_arrow_right'}}
      </mat-icon>
    </button>
    
    <div>Item: {{row.item.id}}</div>
  </ng-template>

  <ng-template #empty_item>
    <span style="width: 40px"></span>
  </ng-template>

API

Inputs

Name	Type	Default	Descirption
list	Array		Items which will be displayed in tree
template	TemplateRef		HTML template for tree item. Inside this template you can place directives (ngxNestableDragHandle and ngxNestableExpandCollapse). That will describe the custom look and position of these elements. Otherwise, the default functions are applied.

options

Name	Type	Default	Descirption
fixedDepth	boolean	false	Constaint items to keep their initial depth
maxDepth	number	5	Maximum nested depth
threshold	number	20	Distance in px after which horizontal movement (nesting) is applied. Also gives padding to the tree.
disableDrag	boolean	false	Disable/enable drag event
template	TemplateRef		HTML template for tree item. Inside this template you can place directives (ngxNestableDragHandle and ngxNestableExpandCollapse). That will describe the custom look and position of these elements, otherwise the default functions are applied.
childrenPropertyName	string	'items'	Children property name.

Outputs

Name	Type	Descirption
drag	void	Emits event when item drag is started
drop	void	Emits event when item is dropped
disclosure	void	Emits event when item expand/collapse state is changed