Hiding Tool Tip for Date Picker Widget

Technical Support
1

Which product are you using?
PDF.js Express Plus

PDF.js Express Version
8.4

Detailed description of issue
How to hide tool tip for DatePickerWidget.?
image

No matter what I do, I can’t seem to stop DatePickerWidget showing ‘undefined’ for tooltip. I can change it, but after opening calendar it just reverts again.

So change of plans is to hide the tooltip if possible. How to accomplish this?

3 
    el.onmouseover = () => {
        el.title = '';
    };