After changing the tsconfig.json file to 'target: ES6' our code successfully compiles and runs without errors in the browser.
However, the chart control and the grid control does not display the data from the datasource anymore.
We had a look at the HTML code and the rows for the grid control are created but the data is missing. During debugging we ensured that the read function of our data source delivers the data.
The controls are displayed with the given config. Additionally the specified column names are also not displayed. These also use kendo templates for inserting data.