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Calling javascript synchronously by Enver Haase, 1 month ago
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Vaadin Forum1. Vaadin Flow - Java

vaadin-grid for data sources of unknown size ?

Catalin Stavaru
7 years ago Feb 27, 2016 5:56pm

Hello,

I am developing a new application with Polymer and found the vaadim-grid element to be quite powerful and (almost) what I need for this project.

However, my data source for the grid cannot provide the total number of records, providing this value will be too computationally expensive. 

I did find some other components on the Internet that can work in such manner, but they leave too much work to the developer.

If I don't set the data source size to the vaadim-grid element, the data source callback is called 

Can the vaadim-grid element work with a data source of unknown size ? 

Thanks !
 

Catalin Stavaru
7 years ago Feb 28, 2016 12:21am

Ok, so I found a (somewhat recent) closed grid issue that added just the support needed for infinite scrolling, thanks to the author for this. It's here:

https://github.com/vaadin/vaadin-grid/issues/265

However, after some scrolling down (and additional data loading), when trying to scroll back to the top of the grid, I get some exceptions thrown from the vaadin-grid javascript: "There is a gap between Class$.. and Class$..". Happens in both Chrome and Edge. Any idea what happens ? Thanks !