JavaScript/jQuery List - Item Deletion

To allow the user to delete items from the List, set the allowItemDeleting property to true. The mode in which the user deletes items depends on the value of the itemDeleteMode property. There are several modes that are enumerated in the code below. To spot the difference between them and choose the most suitable one, refer to the example that completes the property's description in the API reference.

$(function() {
    $("#listContainer").dxList({
        // ...
        allowItemDeleting: true,
        itemDeleteMode: "toggle" // or "static" | "slideButton" | "slideItem" | "swipe" | "context"
    });
});

<dx-list ...
    [allowItemDeleting]="true"
    itemDeleteMode="toggle"> <!-- or "static" | "slideButton" | "slideItem" | "swipe" | "context" -->
</dx-list>

import { DxListModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxListModule
    ],
    // ...
})

View Demo

See Also

• List - Data Binding | Deletion in Custom Sources
• List - Localization

You can delete List items programmatically in the following ways.

• By index
  Pass the index to the deleteItem(itemIndex) method. If the List is grouped, this method should be given an object with the indexes of the group and the item to be deleted.

  jQuery

  JavaScript

  const list = $("#listContainer").dxList("instance");
  // Deletes the item with index 1 
  list.deleteItem(1);
  // Deletes the item with index 0 from the group with index 2
  list.deleteItem({ group: 2, item: 0 });

  Angular

  TypeScript

  import { ..., ViewChild } from "@angular/core";
  import { DxListModule, DxListComponent } from "devextreme-angular";
  // ...
  export class AppComponent {
      @ViewChild(DxListComponent, { static: false }) list: DxListComponent;
      // Prior to Angular 8
      // @ViewChild(DxListComponent) list: DxListComponent;
      deleteItem (index) {
          this.list.instance.deleteItem(index);
      }
      deleteItemFromGroup (itemIndex, groupIndex) {
          // Deletes the item with itemIndex from the group with groupIndex
          this.list.instance.deleteItem({ group: groupIndex, item: itemIndex });
      }
  }
  @NgModule({
      imports: [
          // ...
          DxListModule
      ],
      // ...
  })

• By DOM node
  Pass the DOM node to the deleteItem(itemElement) method.

  jQuery

  JavaScript

  const list = $("#listContainer").dxList("instance");
  // Finds all List items
  const itemNodes = $("#listContainer").find(".dx-list-item");
  // Makes the first item the last
  list.deleteItem(itemNodes[itemNodes.length-1]);

  Angular

  TypeScript

  import { ..., ViewChild } from "@angular/core";
  import { DxListModule, DxListComponent } from "devextreme-angular";
  // ...
  export class AppComponent {
      @ViewChild(DxListComponent, { static: false }) list: DxListComponent;
      // Prior to Angular 8
      // @ViewChild(DxListComponent) list: DxListComponent;
      deleteLastItem () {
          // Finds all List items
          let itemNodes = document.getElementsByClassName("dx-list-item");
          // Deletes the last item
          this.list.instance.deleteItem(itemNodes[itemNodes.length-1]);
      }
  }
  @NgModule({
      imports: [
          // ...
          DxListModule
      ],
      // ...
  })

See Also

• Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
• List Demos
• List API Reference

To execute certain commands before or after an item is deleted from the List, handle the itemDeleting or itemDeleted event. If the functions that handle these events are not going to be changed during the lifetime of the UI component, assign them to the onEventName property when you configure the UI component.

$(function () {
    $("#listContainer").dxList({
        // ...
        onItemDeleting: function(e) {
            const itemData = e.itemData;
            const itemDomNode = e.itemElement;
            const itemIndex = e.itemIndex;
            // Handler of the "itemDeleting" event
        },
        onItemDeleted: function(e) {
            const itemData = e.itemData;
            const itemDomNode = e.itemElement;
            const itemIndex = e.itemIndex;
            // Handler of the "itemDeleted" event
        },
    });
});

<dx-list ...
    (onItemDeleting)="onItemDeleting($event)"
    (onItemDeleted)="onItemDeleted($event)">
</dx-list>

import { DxListModule } from "devextreme-angular";
// ...
export class AppComponent {
    onItemDeleting (e) {
        let itemData = e.itemData;
        let itemDomNode = e.itemElement;
        let itemIndex = e.itemIndex;
        // Handler of the "itemDeleting" event
    }
    onItemDeleted (e) {
        let itemData = e.itemData;
        let itemDomNode = e.itemElement;
        let itemIndex = e.itemIndex;
        // Handler of the "itemDeleted" event
    }
}
@NgModule({
    imports: [
        // ...
        DxListModule
    ],
    // ...
})

If you are going to change the event handlers at runtime, or if you need to attach several handlers to a single event, subscribe to the events using the on(eventName, eventHandler) method. This approach is more typical of jQuery.

const itemDeletingEventHandler1 = function(e) {
    // First handler of the "itemDeleting" event
};

const itemDeletingEventHandler2 = function(e) {
    // Second handler of the "itemDeleting" event
};

$("#listContainer").dxList("instance")
    .on("itemDeleting", itemDeletingEventHandler1)
    .on("itemDeleting", itemDeletingEventHandler2);

See Also

• Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
• List Demos
• List API Reference