---
title: "Javascript Event calendar Resource Filter in Header Example | Mobiscroll"
component: "Event calendar"
framework: "JavaScript"
library_version: "6.1.5"
url: "https://demo.mobiscroll.com/javascript/eventcalendar/resource-filtering-in-header"
---

# Resource Filter in Header - JavaScript Event calendar demo

Filter events by resource in the Javascript event calendar using a segmented control in the header — switch people or resources without a filter panel. Plain JavaScript API.

- [Live demo](https://demo.mobiscroll.com/javascript/eventcalendar/resource-filtering-in-header)
- [View code on GitHub](https://github.com/acidb/mobiscroll-demos-javascript/tree/main/src/demos/eventcalendar/calendar-view/resource-filtering-in-header)
- This demo in other frameworks: [jQuery](https://demo.mobiscroll.com/jquery/eventcalendar/resource-filtering-in-header.md), [Angular](https://demo.mobiscroll.com/angular/eventcalendar/resource-filtering-in-header.md), [React](https://demo.mobiscroll.com/react/eventcalendar/resource-filtering-in-header.md), [Vue](https://demo.mobiscroll.com/vue/eventcalendar/resource-filtering-in-header.md)

## Description

The calendar view doesn't have built in resource listing, however we can easily solve that inside the header using the segmented component. The header of the agenda is a canvas and an opportunity for customization. You can add custom components and enable new interaction in context.

Such an example would be a custom filter block created with the help of a segmented control and placed between the standard UI components, which are:

- **Navigation component** - `<div mbsc-calendar-nav></div>`. Use the `.md-header-filter-controls` CSS class for custom overrides.
- **Today button** - `<button mbsc-calendar-today></button>`. Use the `.md-header-filter-today` CSS class for custom overrides.
- **Previous month button** - `<button mbsc-calendar-prev></button>`. Use the `.md-header-filter-prev` CSS class for custom overrides.
- **Next month button** - `<button mbsc-calendar-next></button>`. Use the `.md-header-filter-next` CSS class for custom overrides.

For changing the order the controls are laid out, you only need to set up the `renderHeader`.

**Overriding the order for specific themes**

For a custom order on a theme to theme basis, you will need to use a little CSS. [Flex layout](https://css-tricks.com/snippets/css/a-guide-to-flexbox/) makes reordering easy. It's just a matter of setting the order in CSS. For material use the `.mbsc-material`, for windows the `.mbsc-windows` prefix and for iOS it is `.mbsc-ios` class. Eg.:

```
.mbsc-material .mds-header-filter-prev { order: 1; }
            .mbsc-material .mds-header-filter-next { order: 2; }
            .mbsc-material .mds-header-filter { order: 3; }
            .mbsc-material .mds-header-filter-today { order: 4; }
```

**Want to style and reorder the header?** [Take a look at the previous example →](https://demo.mobiscroll.com/javascript/eventcalendar/customizing-header)

## What this demo shows

- A desktop month view event calendar with resource-based event filtering shown in the custom header.
- **Header layout** The current month and year are shown on the left, a segmented resource filter is centered in the header, and blue month navigation arrows with a `Today` button between them on the right.
- **Resource filter** The segmented control contains three selectable options: `Barry`, `Hortense`, and `Carl`, each with an avatar shown before the name.
- **Resource filtering** Selecting a resource from the segmented control, updates the month view to show that person's events, making it possible to show or hide events by resource from the header.
- **Color coding** `Barry`'s option and events use green, `Hortense` uses blue, and `Carl` uses pink, so the active filter and the visible events stay visually aligned.
- **Event labels** Days with events display event labels directly in the month cells, with label colors reflecting the associated resource.
- **Overflow handling** The number of visible event labels depends on the available height in each day cell. Additional events are collapsed behind an `X more` link.
- **Popover** Clicking the `X more` link opens a popover that shows the hidden events for that day.
- **Event interaction** Hovering over or selecting an event label highlights it and shows resize handles on both sides, indicating that the event can be resized by clicking and dragging.
- **Day cell states** Hovering a day cell highlights the day number with a gray background, while clicking the empty part of the cell selects the day and highlights the day number with a blue background.
- **Gesture navigation** The month view can also be changed by clicking and dragging the calendar left or right.

## Best for

- **Resource-specific month planning** Viewing one person's month schedule at a time without leaving the calendar view.
- **Team calendars with simple filtering** Switching between a small set of people or resources from a compact header control.
- **Color-coded resource views** Making it easy to distinguish which events belong to which resource.
- **Operational dashboards** Internal scheduling tools where users need quick filtering and fast month-to-month navigation.
- **Custom calendar toolbars** Cases where the standard header needs extra controls without moving filtering outside the calendar.

## API used in this demo

- [`theme`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-theme) - option
- [`themeVariant`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-themeVariant) - option
- [`clickToCreate`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-clickToCreate) - option
- [`dragToCreate`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-dragToCreate) - option
- [`dragToMove`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-dragToMove) - option
- [`dragToResize`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-dragToResize) - option
- [`view`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-view) - option
- [`labels`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-labels) - option
- [`resources`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-resources) - option
- [`renderHeader`](https://mobiscroll.com/docs/javascript/eventcalendar/api#renderer-renderHeader) - renderer
- [`setEvents`](https://mobiscroll.com/docs/javascript/eventcalendar/api#method-setEvents) - method

## Code

### JS

```js
mobiscroll.setOptions({
  theme: 'ios',
  themeVariant: 'light'
});

var myEvents = [];

var myResources = [
  {
    id: 1,
    name: 'Barry',
    color: '#328e39',
    img: 'https://img.mobiscroll.com/demos/m1.png',
  },
  {
    id: 2,
    name: 'Hortense',
    color: '#00aabb',
    img: 'https://img.mobiscroll.com/demos/f1.png',
  },
  {
    id: 3,
    name: 'Carl',
    color: '#ea72c0',
    img: 'https://img.mobiscroll.com/demos/m2.png',
  },
];

var selectedResources = { 1: true };

var calendar = mobiscroll.eventcalendar('#demo-header-filter', {
  clickToCreate: false,
  dragToCreate: false,
  dragToMove: true,
  dragToResize: true,
  view: {
    calendar: { labels: true },
  },
  resources: myResources,
  renderHeader: function () {
    var header = '<div mbsc-calendar-nav class="mds-header-filter-nav"></div>' + '<div class="mds-header-filter mbsc-flex-1-0">';

    myResources.forEach(function (res) {
      header +=
        '<label class="mds-header-filter-' +
        res.id +
        '">' +
        '<img class="mds-header-filter-img" src="' +
        res.img +
        '"/>' +
        '<span class="mds-header-filter-name">' +
        res.name +
        '</span>' +
        '<input type="checkbox" mbsc-segmented name="resource" class="mds-header-filter-input" value="' +
        res.id +
        '" ' +
        (res.id === 1 ? 'checked' : '') +
        '>' +
        '</label>';
    });

    header +=
      '</div>' +
      '<button mbsc-calendar-prev class="mds-header-filter-prev"></button>' +
      '<button mbsc-calendar-today class="mds-header-filter-today"></button>' +
      '<button mbsc-calendar-next class="mds-header-filter-next"></button>';
    return header;
  },
});

mobiscroll.getJson(
  'https://trial.mobiscroll.com/filter-resource-events/',
  function (events) {
    myEvents = events;
    var filteredEvents = myEvents.filter(function (e) {
      return selectedResources[e.resource];
    });
    calendar.setEvents(filteredEvents);
  },
  'jsonp',
);

document.querySelectorAll('.mds-header-filter-input').forEach(function (target) {
  target.addEventListener('change', function () {
    selectedResources[target.value] = target.checked;
    var resource = myResources.find(function (r) {
      return r.id === +target.value;
    });
    var filteredEvents = myEvents.filter(function (e) {
      return selectedResources[e.resource];
    });

    calendar.setEvents(filteredEvents);

    mobiscroll.toast({
      message: (target.checked ? 'Showing ' : 'Hiding ') + (resource ? resource.name : '') + ' events',
    });
  });
});
```

### HTML

```html
<div id="demo-header-filter"></div>
```

### CSS

```css
.mds-header-filter-nav {
  width: 180px;
}

.mds-header-filter-img {
  width: 25px;
}

.mds-header-filter-name {
  margin-left: 10px;
}

.mds-header-filter .mbsc-segmented {
  max-width: 400px;
  margin: 0 auto;
}

.mds-header-filter .mbsc-segmented-button.mbsc-selected {
  color: #fff;
}

.mds-header-filter-1 .mbsc-button.mbsc-selected.mbsc-material,
.mds-header-filter-1 .mbsc-button.mbsc-selected.mbsc-windows,
.mds-header-filter-1 .mbsc-segmented-selectbox-inner {
  background: #328e39;
}

.mds-header-filter-2 .mbsc-button.mbsc-selected.mbsc-material,
.mds-header-filter-2 .mbsc-button.mbsc-selected.mbsc-windows,
.mds-header-filter-2 .mbsc-segmented-selectbox-inner {
  background: #00aabb;
}

.mds-header-filter-3 .mbsc-button.mbsc-selected.mbsc-material,
.mds-header-filter-3 .mbsc-button.mbsc-selected.mbsc-windows,
.mds-header-filter-3 .mbsc-segmented-selectbox-inner {
  background: #ea72c0;
}

.mbsc-material .mds-header-filter-prev {
  order: 1;
}

.mbsc-material .mds-header-filter-next {
  order: 2;
}

.mbsc-material .mds-header-filter {
  order: 3;
}

.mbsc-material .mds-header-filter-today {
  order: 4;
}
```

## Implementation notes

- Set `view: { calendar: { labels: true } }`. Enable `dragToMove: true` and `dragToResize: true` to allow moving and resizing events.
- Define a `resources` array where each entry has `id`, `name`, `color`, and `img` fields. Pass the array to the calendar via the `resources` option.
- Build the custom header with a `SegmentedGroup` set to `select="multiple"`. Render one `Segmented` per resource, each containing the resource's avatar image and name. Initialize the selected state to the first resource's id. Use `renderHeader` to inject the custom header (Angular: `headerTemplate`; Vue: use the `header` slot). Arrange the header elements as: navigation nav → segmented filter block → prev button → today button → next button.
- On `SegmentedGroup` change, filter the full events array to only those whose `resource` property matches a selected id, update the calendar's `data`, and show a `Toast` with `'Showing [name] events'` or `'Hiding [name] events'`. JS/jQuery: call `calendar.setEvents(filteredEvents)` instead of updating reactive data. Angular: use the `Notifications` service to show the toast.
- Load events from a remote endpoint using `getJson` and initialize the calendar with the subset filtered to the initially selected resource. JS/jQuery: call `calendar.setEvents(filteredEvents)` in the callback.

## 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-javascript.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 javascript
   ```

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

   ```
   npm install
   ```

6. Run the project:

   ```
   npm run dev
   ```

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

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