Highlight the date when drag to change the start and end date

[xinyan999]

Thanks for sharing this amazing library. I use this library in my project, how to make it when drag to change the task start or end date, it will highlight the start or end date at top?
Can the project item display multi color in one bar? For example, as showing in the screenshot, the high priority has several tasks, assuming each task bar has different color, can project bar represent each task in different color based on the precent of the duration days taken in the whole project? Any idea that could help me to achieve this?
Thank you.