---
title: "Angular Timeline Multi-Select & Bulk Event Actions Example | Mobiscroll"
component: "Timeline"
framework: "Angular"
library_version: "6.1.5"
url: "https://demo.mobiscroll.com/angular/timeline/event-bulk-actions-edit-delete-update"
---

# Multi-Select & Bulk Event Actions - Angular Timeline demo

Select multiple events on a Angular Timeline by keyboard shortcut or button, then apply bulk delete or update — a side panel tracks the selection.

- [Live demo](https://demo.mobiscroll.com/angular/timeline/event-bulk-actions-edit-delete-update)
- [View code on GitHub](https://github.com/acidb/mobiscroll-demos-angular/tree/main/src/demos/eventcalendar/timeline/event-bulk-actions-edit-delete-update)
- This demo in other frameworks: [JavaScript](https://demo.mobiscroll.com/javascript/timeline/event-bulk-actions-edit-delete-update.md), [jQuery](https://demo.mobiscroll.com/jquery/timeline/event-bulk-actions-edit-delete-update.md), [React](https://demo.mobiscroll.com/react/timeline/event-bulk-actions-edit-delete-update.md), [Vue](https://demo.mobiscroll.com/vue/timeline/event-bulk-actions-edit-delete-update.md)

## Description

Multiple event selection can be turned on with the [`selectMultipleEvents`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-selectMultipleEvents) option. Selecting multiple events can be done through user interaction with `CTRL`/`SHIFT`/`CMD` + click or programmatically eg. click of a button or 'select all' checkbox.

Bulk operations like delete, update can be applied the selected events. Things like deleting with the `backspace` or `delete` buttons work out of the box but custom actions can be also applied. The selection can be easily retrieved and updated with the [`selectedEvents`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-selectedEvents) option and the [`onSelectedEventsChange`](https://mobiscroll.com/docs/angular/eventcalendar/api#event-onSelectedEventsChange) event.

Custom actions can be performed with external buttons or with context menu activated on right-click.

## What this demo shows

- A desktop weekly timeline where days are arranged horizontally and resources are listed as rows on the left.
- **Header navigation** The month and year label opens date navigation, while the previous and next arrows move between weeks, and the Today button returns to the current date.
- **Week view** The strip below the header shows the selected week from Sunday to Saturday, with the current date highlighted.
- **Time grid** The timeline displays hourly columns from 12 AM to 12 PM.
- **Resources** Multiple resources are shown as separate timeline rows.
- **Current time** A vertical blue line with a time label marks the current time.
- **Hover behavior** Hovering over the time grid shows a time indicator that follows the cursor in 15-minute increments.
- **Bulk action panel** A side panel next to the timeline contains `Select all from view`, `Reset selection`, and `Update selected` actions.
- **Select all from view** Clicking this action selects all events currently visible, highlights their titles in the week view, and shows a bottom-centered toast message: `All events selected from the view`.
- **Reset selection** Clicking this action clears the current selection and shows a bottom-centered toast message: `Selection cleared`.
- **Update selected** Clicking this action changes the color of all selected events to orange and shows a bottom-centered toast message: `All selected event's color changed to orange`.
- **Currently selected** The side panel includes a `Currently selected` section that is empty by default and lists the titles of all selected events when one or more events are selected.
- **Multi-selection** Users can select multiple events with `CTRL`/`SHIFT`/`CMD` + click.
- **Context menu** Right-clicking an event opens a small popup with `Update` and `Delete` actions for that event.
- **Event cards** Events appear as colored cards with a colored stripe on the left, the event title in bold, and the exact start and end time displayed below the title.
- **Variable event height** Timeline events grow to fit their custom event content instead of forcing every event into the same fixed height.
- **Resource row height** Resource rows adjust dynamically based on the height of the events they contain.
- **Date positioning** Events are positioned by their assigned resource and exact date range.
- **Event interaction** Events highlight on hover and show drag and resize handles for repositioning or changing duration.
- **Event selection** Clicking an event selects and highlights it.
- **Event creation** New events can be created by double-clicking the timeline or by clicking and dragging across a time range.
- **Scrolling** The timeline supports horizontal and vertical scrolling for navigating through time and resources.

## Best for

- **Bulk schedule updates** Selecting several events and applying the same change, such as updating the color or status of multiple scheduled items at once.
- **Resource planning workflows** Managing schedules where events are grouped by resource and users need to act on several assignments in the same timeline view.
- **Operational cleanup** Reviewing a week of visible events and clearing, updating, or deleting selected items without editing each event individually.
- **Multi-event review** Tracking the current selection in a side panel so users can confirm which events will be affected before running a bulk action.
- **Context-specific actions** Giving users quick access to update and delete actions from a right-click menu while still supporting toolbar-style bulk actions.

## API used in this demo

- [`theme`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-theme) - option
- [`themeVariant`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-themeVariant) - option
- [`firstDay`](https://mobiscroll.com/docs/angular/eventcalendar/api#localization-firstDay) - option
- [`clickToCreate`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-clickToCreate) - option
- [`dragToCreate`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-dragToCreate) - option
- [`dragToMove`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-dragToMove) - option
- [`dragToResize`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-dragToResize) - option
- [`eventDelete`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-eventDelete) - option
- [`selectMultipleEvents`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-selectMultipleEvents) - option
- [`view`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-view) - option
- [`resources`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-resources) - option
- [`onEventUpdate`](https://mobiscroll.com/docs/angular/eventcalendar/api#event-onEventUpdate) - event
- [`onEventDelete`](https://mobiscroll.com/docs/angular/eventcalendar/api#event-onEventDelete) - event
- [`onPageLoading`](https://mobiscroll.com/docs/angular/eventcalendar/api#event-onPageLoading) - event
- [`onSelectedEventsChange`](https://mobiscroll.com/docs/angular/eventcalendar/api#event-onSelectedEventsChange) - event
- [`onEventRightClick`](https://mobiscroll.com/docs/angular/eventcalendar/api#event-onEventRightClick) - event
- [`touchUi`](https://mobiscroll.com/docs/angular/select/api#opt-touchUi) - option
- [`display`](https://mobiscroll.com/docs/angular/select/api#opt-display) - option
- [`buttons`](https://mobiscroll.com/docs/angular/select/api#opt-buttons) - option
- [`data`](https://mobiscroll.com/docs/angular/select/api#opt-data) - option
- [`onChange`](https://mobiscroll.com/docs/angular/select/api#event-onChange) - event
- [`onClose`](https://mobiscroll.com/docs/angular/select/api#event-onClose) - event
- [`getEvents`](https://mobiscroll.com/docs/angular/eventcalendar/api#method-getEvents) - method
- [`selectedEvents`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-selectedEvents) - option
- [`data`](https://mobiscroll.com/docs/angular/eventcalendar/api#opt-data) - option
- [`anchor`](https://mobiscroll.com/docs/angular/select/api#opt-anchor) - option

## Code

### Component

```ts
import { CommonModule } from '@angular/common';
import { HttpClient } from '@angular/common/http';
import { Component, OnInit, ViewChild } from '@angular/core';
import { FormsModule } from '@angular/forms';
import {
  formatDate,
  MbscCalendarEvent,
  MbscEventcalendar,
  MbscEventcalendarOptions,
  MbscModule,
  MbscSelect,
  MbscSelectOptions,
  Notifications,
  setOptions,
} from '@mobiscroll/angular';

setOptions({
  theme: 'ios',
  themeVariant: 'light'
});

@Component({
  selector: 'app-root', 
  templateUrl: './app.component.html',
  providers: [Notifications],
  standalone: true,
  imports: [CommonModule, FormsModule, MbscModule],
})
export class AppComponent implements OnInit {
  constructor(
    private http: HttpClient,
    private notify: Notifications,
  ) {}

  @ViewChild('calendar', { static: false })
  calendar!: MbscEventcalendar;

  @ViewChild('menu', { static: false })
  menu!: MbscSelect;

  myEvents: MbscCalendarEvent[] = [];

  mySelectedEvents: MbscCalendarEvent[] = [];
  eventTitles: string[] = [];
  selectValue: string | null = null;
  firstDay!: Date;
  lastDay!: Date;
  menuAnchor!: HTMLElement;
  confirmOpen = false;

  getSelectedEventTitles(events: MbscCalendarEvent[]) {
    let titles: string[] = [];
    for (const event of events) {
      titles = [...titles, event.title!];
    }
    return titles;
  }

  refreshSelectedEvents(events: MbscCalendarEvent[]) {
    this.mySelectedEvents = events;
    this.eventTitles = this.getSelectedEventTitles(events);
  }

  updateSelectedEvents() {
    const events = this.mySelectedEvents;
    let eventsToUpdate = [...this.myEvents];
    for (const event of events) {
      if (event.recurring) {
        const origEvent = event.original!;
        const exc = (origEvent.recurringException as string[]) || [];
        const newEvent = event;

        newEvent.recurring = undefined;
        newEvent.color = 'orange';
        newEvent.id += '_' + formatDate('YYYY-MM-DD', new Date(event.start as string));
        eventsToUpdate = [...eventsToUpdate, newEvent];

        origEvent.recurringException = [...exc, event.start];

        // Update the event in the list
        const index = eventsToUpdate.findIndex((x) => x.id === origEvent['id']);
        eventsToUpdate.splice(index, 1, origEvent);
      } else {
        const newEv = event;
        newEv.color = 'orange';
        const index = eventsToUpdate.findIndex((x) => x.id === newEv.id);
        eventsToUpdate.splice(index, 1, newEv);
      }
    }

    this.myEvents = eventsToUpdate;
    this.refreshSelectedEvents([]);

    this.notify.toast({
      message: "All selected event's color changed to orange",
    });
  }

  deleteSelectedEvents() {
    this.confirmOpen = true;
    this.notify.confirm({
      title: 'Are you sure you want to delete the following events?',
      message: this.getSelectedEventTitles(this.mySelectedEvents).join(','),
      okText: 'Delete',
      callback: (result) => {
        if (result) {
          let eventsToUpdate = [...this.myEvents];

          for (const event of this.mySelectedEvents) {
            if (event.recurring) {
              const origEvent = event.original!;
              const exc = (origEvent.recurringException as string[]) || [];
              origEvent.recurringException = [...exc, event.start];

              // Update the event in the list
              const index = eventsToUpdate.findIndex((x) => x.id === origEvent['id']);
              eventsToUpdate.splice(index, 1, origEvent);
            } else {
              eventsToUpdate = eventsToUpdate.filter((ev) => ev.id !== event.id);
            }
          }

          this.myEvents = eventsToUpdate;
          this.refreshSelectedEvents([]);

          this.notify.toast({
            message: 'Deleted',
          });
        }
        this.confirmOpen = false;
      },
    });
  }

  calendarOptions: MbscEventcalendarOptions = {
    clickToCreate: true,
    dragToCreate: true,
    dragToMove: true,
    dragToResize: true,
    eventDelete: true,
    selectMultipleEvents: true,
    view: {
      timeline: {
        type: 'week',
      },
    },
    resources: [
      {
        id: 1,
        name: 'Ryan',
        color: '#fdf500',
      },
      {
        id: 2,
        name: 'Kate',
        color: '#ff4600',
      },
      {
        id: 3,
        name: 'John',
        color: '#ff0101',
      },
      {
        id: 4,
        name: 'Mark',
        color: '#239a21',
      },
      {
        id: 5,
        name: 'Sharon',
        color: '#8f1ed6',
      },
      {
        id: 6,
        name: 'Ashley',
        color: '#01adff',
      },
    ],
    onEventUpdate: (args) => {
      if (args.isDelete) {
        if (!this.confirmOpen) {
          this.deleteSelectedEvents();
        }
        return false;
      }
      return true;
    },
    onEventDelete: () => {
      if (!this.confirmOpen) {
        this.deleteSelectedEvents();
      }
      return false;
    },
    onPageLoading: (args) => {
      setTimeout(() => {
        this.firstDay = args.firstDay;
        this.lastDay = args.lastDay;
      });
    },
    onSelectedEventsChange: (args) => {
      this.refreshSelectedEvents(args.events);
    },
    onEventRightClick: (args) => {
      args.domEvent.preventDefault();
      this.menuAnchor = args.domEvent.target;
      setTimeout(() => {
        this.menu.open();
      });
    },
  };

  menuOptions: MbscSelectOptions = {
    touchUi: false,
    display: 'anchored',
    buttons: [],
    data: [
      { value: 'update', text: 'Update' },
      { value: 'delete', text: 'Delete' },
    ],
    onChange: (args) => {
      if (args.value === 'update') {
        this.updateSelectedEvents();
      } else if (args.value === 'delete') {
        this.deleteSelectedEvents();
      }
    },
    onClose: () => {
      setTimeout(() => {
        // Clear selection
        this.selectValue = null;
      });
    },
  };

  selectAllEvents() {
    this.refreshSelectedEvents(this.calendar.getEvents(this.firstDay, this.lastDay));
    this.notify.toast({
      message: 'All events selected from view',
    });
  }

  resetSelection() {
    this.refreshSelectedEvents([]);
    this.notify.toast({
      message: 'Selection cleared',
    });
  }

  onKeyDown(ev: any) {
    if (!this.confirmOpen && (ev.keyCode === 8 || ev.keyCode === 46)) {
      this.deleteSelectedEvents();
    }
  }

  ngOnInit(): void {
    this.http.jsonp<MbscCalendarEvent[]>('https://trial.mobiscroll.com/timeline-events/', 'callback').subscribe((resp) => {
      this.myEvents = resp;
    });
  }
}
```

### Template

```html
<mbsc-page class="md-bulk-operations" (keydown)="onKeyDown($event)">
  <div class="mbsc-grid mbsc-no-padding">
    <div class="mbsc-row">
      <div class="mbsc-col-sm-9 mbsc-push-sm-3 md-bulk-operations-border">
        <mbsc-eventcalendar
          #calendar
          [(selectedEvents)]="mySelectedEvents"
          [data]="myEvents"
          [options]="calendarOptions"
        ></mbsc-eventcalendar>
        <mbsc-select style="display: none" #menu [(ngModel)]="selectValue" [anchor]="menuAnchor" [options]="menuOptions"> </mbsc-select>
      </div>
      <div class="mbsc-col-sm-3 mbsc-pull-sm-9">
        <div class="mbsc-form-group">
          <div class="mbsc-button-group-block">
            <mbsc-button (click)="selectAllEvents()">Select all from view</mbsc-button>
            <mbsc-button (click)="resetSelection()">Reset selection</mbsc-button>
            <mbsc-button (click)="updateSelectedEvents()">Update selected</mbsc-button>
          </div>
        </div>
        <div class="mbsc-form-group-title">Currently selected</div>
        <div class="mbsc-padding md-selected-event-list">
          <ul>
            <li *ngFor="let title of eventTitles;">{{title}}</li>
          </ul>
        </div>
      </div>
    </div>
  </div>
</mbsc-page>
```

### CSS

```css
.md-bulk-operations-border {
  border-left: 1px solid #ccc;
}

.md-selected-event-list {
  height: 500px;
  overflow: auto;
  padding-top: 0;
  padding-bottom: 0;
}
```

## Implementation notes

- Use `timeline: { type: 'week' }` - a weekly view.
- Set `selectMultipleEvents: true` to enable Ctrl/Shift/Cmd+click multi-selection.
- Define 6 named resources (Ryan, Kate, John, Mark, Sharon, Ashley) each with `id`, `name`, and `color`.
- Load events asynchronously from `https://trial.mobiscroll.com/timeline-events/` via JSONP; set them on the calendar after load.
- Use a two-column layout: the calendar occupies 9/12 columns (pushed right), the sidebar 3/12 (pulled left). The sidebar contains three action buttons ("Select all from view", "Reset selection", "Update selected") and a scrollable list of currently selected event titles.
- Track `firstDay` and `lastDay` via `onPageLoading` (`args.firstDay` / `args.lastDay`). These are used by "Select all from view".
- `onSelectedEventsChange` → update the current selection and refresh the displayed titles list. React/Angular/Vue: the selection is tracked via the bound `selectedEvents` prop/binding (two-way); this handler just mirrors it into local state for the titles list.
- **"Select all from view"** → call `calendar.getEvents(firstDay, lastDay)` to get the visible events, then update the selection and the titles list. React/Angular/Vue: assign the result to the state/binding feeding the `selectedEvents` prop. JS/jQuery: pass the result to `calendar.setSelectedEvents()`. Shows toast "All events selected from view".
- **"Reset selection"** → clear the selection and the titles list. React/Angular/Vue: set the `selectedEvents` state/binding to `[]`. JS/jQuery: call `calendar.setSelectedEvents([])`. Shows toast "Selection cleared".
- **"Update selected"** → `updateSelectedEvents()`: get the currently selected events - React/Angular/Vue: read them from the bound `selectedEvents` state/binding; JS/jQuery: call `calendar.getSelectedEvents()` - then iterate and change color to orange. For **recurring occurrences**: detach the occurrence - set `recurring = undefined`, assign a new `id` by appending `_` + `formatDate('YYYY-MM-DD', event.start)`, add the occurrence's start to `origEvent.recurringException`. React/Angular/Vue: replace `origEvent` in place and append `newEvent` in the array bound to `data`. JS/jQuery: call `calendar.updateEvent(origEvent)` and `calendar.addEvent(newEvent)`. For **non-recurring**: set `color = 'orange'`. React/Angular/Vue: replace the event in place in the array bound to `data`. JS/jQuery: call `calendar.updateEvent(event)`. After: clear the selection (React/Angular/Vue: set the `selectedEvents` state/binding to `[]`; JS/jQuery: call `calendar.setSelectedEvents([])`), show toast "All selected event's color changed to orange".
- **`deleteSelectedEvents()`** → set `confirmOpen = true`, show a confirm dialog ("Are you sure you want to delete the following events?") with the selected event titles joined as the message and "Delete" as the ok button. On confirm: for **recurring** events, push `event.start` into `origEvent.recurringException` - React/Angular/Vue: replace `origEvent` in place in the array bound to `data`; JS/jQuery: call `calendar.updateEvent(origEvent)`. For **non-recurring**, collect them, then remove them - React/Angular/Vue: filter `eventsToDelete` out of the array bound to `data`; JS/jQuery: call `calendar.removeEvent(eventsToDelete)`. After: clear the selection (React/Angular/Vue: set the `selectedEvents` state/binding to `[]`; JS/jQuery: call `calendar.setSelectedEvents([])`), show toast "Deleted", set `confirmOpen = false`.
- Three entry points trigger `deleteSelectedEvents()`: (1) **`onEventDelete`** - fired by the Delete/Backspace key; use the `confirmOpen` flag to prevent double-triggering, then `return false`; (2) **`onEventUpdate` with `args.isDelete === true`** - fired when Mobiscroll attempts a keyboard delete on a multi-selection; same guard and `return false`; (3) **context menu "Delete" option**.
- **Right-click context menu**: `onEventRightClick` → store `selectedEvent = args.event` as a fallback (used if no events are selected), `args.domEvent.preventDefault()`, set the menu anchor to `args.domEvent.target`, open an anchored `Select` popup (`display: 'anchored'`, `touchUi: false`, no buttons) with two options ("Update" / "Delete"). On selection dispatch to `updateSelectedEvents()` or `deleteSelectedEvents()`; `updateSelectedEvents` / `deleteSelectedEvents` fall back to `[selectedEvent]` when the current selection is empty (React/Angular/Vue: the bound `selectedEvents` state/binding; JS/jQuery: `getSelectedEvents()`). On menu close, clear the selected value.
- **Keyboard delete**: attach a `keydown` listener on the `.md-bulk-operations` container; if Delete or Backspace is pressed and no confirm dialog is open, call `deleteSelectedEvents()`.

## Run it in your project

1. If not signed up yet, or don't own a license, you can [start a free trial](https://mobiscroll.com/starttrial).

2. Clone the repository:

   ```
   git clone https://github.com/acidb/mobiscroll-demos-angular.git
   ```

3. If not installed yet, install the Mobiscroll CLI from NPM:

   ```
   npm install -g @mobiscroll/cli
   ```

4. Config Mobiscroll - open a terminal window in the root directory and run:

   ```
   mobiscroll config angular
   ```

5. Install dependencies - open a terminal window in the root directory and run:

   ```
   npm install
   ```

6. Run the project:

   ```
   ng serve
   ```

On a trial, add `--trial` to the config command: `mobiscroll config angular --trial`.

Running a demo locally requires a Mobiscroll trial or a license; setup is per framework at https://mobiscroll.com/docs/angular/getting-started/installation

## Related demos

- Previous: [Block Past Event Creation](https://demo.mobiscroll.com/angular/timeline/disallow-past-event-creation.md) - Keep past dates read-only on a Angular resource timeline — block creation, moving, and resizing, and show a toast for blocked actions.