Cell Hover Highlight

Highlight the resource row and date column on cell hover to improve usability by clearly showing where the user is interacting.

This is achieved using the onCellHoverIn and onCellHoverOut lifecycle events. These track the hovered cell and update the resources with a custom cssClass, which highlights the resource row. A popup is also shown on hover, displaying relevant information about the cell like the date and resource name.

The column highlight is applied using the renderCell, renderSidebar, renderTimelineDay, and renderDayFooter callbacks, where conditional markup is returned to highlight the vertical column.

This makes it easy to implement custom hover interactions that match your design and UX goals.

Download and try example

Demo

Loading the live demo

Preview in full screen

Add row and column hover highlighting to a resource timeline — highlight the active resource row and date column on hover.

Code

View code on GitHub 
mobiscroll.setOptions({
  locale:  ,
  theme: ' ',
  themeVariant: ' '
});

var myEvents = [
  {
    start: '2026-10-02T00:00',
    end: '2026-10-05T00:00',
    title: 'Event 1',
    resource: 1,
  },
  {
    start: '2026-10-10T09:00',
    end: '2026-10-15T15:00',
    title: 'Event 2',
    resource: 3,
  },
  {
    start: '2026-10-12T00:00',
    end: '2026-10-14T00:00',
    title: 'Event 3',
    resource: 4,
  },
  {
    start: '2026-10-15T07:00',
    end: '2026-10-20T12:00',
    title: 'Event 4',
    resource: 5,
  },
  {
    start: '2026-10-03T00:00',
    end: '2026-10-10T00:00',
    title: 'Event 5',
    resource: 6,
  },
  {
    start: '2026-10-10T08:00',
    end: '2026-10-11T20:00',
    title: 'Event 6',
    resource: 7,
  },
  {
    start: '2026-10-22T00:00',
    end: '2026-10-28T00:00',
    title: 'Event 7',
    resource: 7,
  },
  {
    start: '2026-10-08T00:00',
    end: '2026-10-13T00:00',
    title: 'Event 8',
    resource: 15,
  },
  {
    start: '2026-10-25T00:00',
    end: '2026-10-27T00:00',
    title: 'Event 9',
    resource: 10,
  },
  {
    start: '2026-10-20T00:00',
    end: '2026-10-23T00:00',
    title: 'Event 10',
    resource: 12,
  },
];

var myResources = [
  { id: 1, name: 'Resource A', color: '#e20000' },
  { id: 2, name: 'Resource B', color: '#76e083' },
  { id: 3, name: 'Resource C', color: '#4981d6' },
  { id: 4, name: 'Resource D', color: '#e25dd2' },
  { id: 5, name: 'Resource E', color: '#1dab2f' },
  { id: 6, name: 'Resource F', color: '#d6d145' },
  { id: 7, name: 'Resource G', color: '#34c8e0' },
  { id: 8, name: 'Resource H', color: '#9dde46' },
  { id: 9, name: 'Resource I', color: '#166f6f' },
  { id: 10, name: 'Resource J', color: '#f7961e' },
  { id: 11, name: 'Resource K', color: '#34c8e0' },
  { id: 12, name: 'Resource L', color: '#af0000' },
  { id: 13, name: 'Resource M', color: '#446f1c' },
  { id: 14, name: 'Resource N', color: '#073138' },
  { id: 15, name: 'Resource O', color: '#4caf00' },
];

var formatDate = mobiscroll.formatDate;
var hoverDateTime;

var calendar = mobiscroll.eventcalendar('#demo-highlight-hover', {
  cssClass: 'mds-highlight-hover',
  data: myEvents,
  resources: myResources,
  view: {
    timeline: {
      type: 'month',
      resolutionHorizontal: 'day',
    },
  },
  onCellHoverIn: function (args) {
    document.querySelector('.mds-highlight-tooltip-name').textContent = args.resource.name;
    document.querySelector('.mds-highlight-tooltip-date').textContent = formatDate('MMM DD, YYYY', args.date);

    tooltip.setOptions({ anchor: args.domEvent.target });
    tooltip.open();

    hoverDateTime = args.date;

    myResources.forEach(function (r) {
      r.cssClass = r.id === args.resource.id ? 'mds-highlight-row-hover' : '';
    });
    calendar.setOptions({ resources: myResources.slice() });
  },

  onCellHoverOut: function () {
    tooltip.close();
    myResources.forEach(function (r) {
      r.cssClass = '';
    });
    hoverDateTime = null;
    setTimeout(function () {
      calendar.setOptions({ resources: myResources.slice() });
    });
  },
  renderCell: function (args) {
    return hoverDateTime && args.date.getTime() === hoverDateTime.getTime() ? '<div class="mds-highlight-col-hover"></div>' : '';
  },
  renderTimelineDay: function (args) {
    var isHover = hoverDateTime && args.date.getTime() === hoverDateTime.getTime();
    var hoverClass = isHover ? ' mds-highlight-col-hover' : '';
    return '<div class="mds-highlight-day-content ' + hoverClass + '">' + formatDate('D DDD', args.date) + '</div>';
  },
  renderDayFooter: function (args) {
    var isHover = hoverDateTime && args.date.getTime() === hoverDateTime.getTime();
    var hoverClass = isHover ? ' mds-highlight-col-hover' : '';
    return '<div class="mds-highlight-day-content ' + hoverClass + '">' + formatDate('D DDD', args.date) + '</div>';
  },
  renderSidebar: function (resource) {
    return '<div>' + resource.name + ' Sidebar</div>';
  },
});

var tooltip = mobiscroll.popup('#demo-highlight-cell-popup', {
  display: 'anchored',
  showOverlay: false,
  scrollLock: false,
  focusOnClose: false,
  closeOnScroll: true,
});

Duplicate Session

You have signed in on a different machine. To keep everything in sync, you have been signed out of this session.

If you need to invite team members, manage seats and accounts you can do it from the licenses page.

Duplicate Session

We noticed you are logged in on a different machine and have closed your old session.

If you need to invite team members, manage seats and accounts you can do it from the licenses page.