Custom tooltips were introduced as an in-app update in version 10.42

You can add tooltips to DayBack by creating an On Hover event action for any calendar source (any FileMaker table). Event actions can call URLs, FileMaker Scripts, or JavaScript, and to create a simple tooltip you'll use a JavaScript function called dbk_tooltip like this:


Add that to the $$sc_EventActions variable in the FileMaker script "Load Source Settings at Startup...". Here is what setting that variable looks like:

Then run the "Upon Opening" script to save your changes and you'll see a tooltip like this:

Customizing Your Tooltips

The tooltip will show anything returned by the JavaScript passed into dbk.tooltip so you can get very creative here. Below you'll find some tips for customizing the display. Please contact us if you'd like help making something special.

Adding More Fields

Add more fields to the tooltip by separating them with a "+" sign. You can also add HTML to make things more readable. Here's the event title followed by the resource on a new line:

"javascript:dbk.tooltip(event.title + '<br />' + event.resource);"

The "event dot" notation is how you'll specify any fields you've made available to DayBack: these are the "under the hood" names for your fields, not the names used in your FileMaker solution. You'll see a list of all these under the hood names here: Event Actions / Referencing Fields.

Formatting Dates and Times

Tooltips have access to the momentjs library and you'll use that to format dates and times. For example, the event start time is event.start, but you'll want to display it like this

event.start.format('h:mm a')

This may seem tedious, but moment's date and time formatting is really wonderful. Try this one:




All the supported formatting options are here:

Styling Tooltips

Tooltips are styled with CSS. If you haven't played with DayBack's CSS before, you can learn more about it here, including how to call different CSS for different calendars, different views, and even different users.

The most basic styling involves just customizing the CSS class already assigned to the tooltips by default. This class is tooltip-custom and you can do things like this to make the text of the tooltip a different font size:

.tooltip-custom {
font-size: 16px;

To change the background color of the tooltip you need to address it AND the little triangle that comes with it:

.tooltip-custom .tooltip-inner {
background: red;
} .tooltip-arrow {
border-top-color: red;
.tooltip-custom.bottom .tooltip-arrow {
border-bottom-color: red;
.tooltip-custom.left .tooltip-arrow {
border-left-color: red;
.tooltip-custom.right .tooltip-arrow {
border-right-color: red;

Going further, you can add your own CSS classes within the tooltip to style individual fields or elements differently. Here we've set up the tooltip so we can style the field labels differently than the field contents:

"javascript:dbk.tooltip('<span class=" & Quote("tooltiplable") & ">Status: </span>'+ event.status + '<br />' + '<span class=" & Quote("tooltiplable") & ">Resource: </span>' + event.resource);"

And the CSS would be something like:

.tooltip-custom .tooltiplable {
color: #CCCCCC;

Using Different Tooltips on Each View

Tooltips are defined per-source, so you can easily have different tooltip content for each of your different FileMaker tables. But you may also want to show slightly different content on different views/tabs in DayBack.

To do so, you'll create If() statements in your Javascript for each view you're interested in. The example below shows a simpler tooltip on Month and Day views, where you can already see the whole event title, and then adds the title back on all other views:

"javascript:if (seedcodeCalendar.get('view').name == 'month' || seedcodeCalendar.get('view').name == 'basicDay' ) { dbk.tooltip('Status: '+ event.status + '<br />' + 'Resource: ' + event.resource); } else { dbk.tooltip('Status: '+ event.status + '<br />' + 'Resource: ' + event.resource + '<br />' + event.title) ; }"

As shown above, you can get the current view name with:

The view names are listed below; "basic" views are the ones without the time scale on the left side.

You may also want to change the tooltip if the calendar's columns are below a certain width. You can do that by using this to find the width:


Note that longer, in-line JS like the example above can be hard to read, and you can't have linebreaks (or smart quotes!) in these actions when you use the "javascript:..." notation. For longer JS you may want to export your JS as a file and then use the "file:..." notation when describing your action. Exporting a file is described here under "Enabling Event Actions": Event Actions.

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