Many Thanks Polina.
I don't understand what mean 'You may change your property types from "number" to "integer".'.
The bar chart was popolated by one infotable with the following fields
The Bar Chart does not contain the property XAxisFormat.
Could I change the type of DateInfo from datetime to String ...
I'll try it.
First and most important - what kind of widget do you use? LabelChart with ChartType Bar or ProportionalChart? This is most important information if you'd like to get your answer.
After you bind your source service returning InfoTable, you have possibility to configure the format of Y axis in the YAxisFormat property.
Ah, so it's a custom widget from Marketplace, no one of the OOTB ones. That's an important information.
From what I researched: There's no possibility to remove decimals. Even if you pass an Integer instead of a Number property, it's parsed to have decimals.
But you can easily have a shorter date - just pass a date as a formatted string. It works.
Hope it helps.