I want to perform a heavy request every time i expand a row, then fill child grid with data from the response.
How to keep the rows of child grid expanded when requesting data with detailDataBound callback?
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Thanks for your update.
By default, updating the state variable will refresh the react component. So, we suggest you to bind the childGrid dataSource from the event argument. Find the below code for your reference.
args.childGrid.dataSource = result.entries;
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