the 'Java Script Bar Chart' shows a strange behavior: Bars are only shown at Mouse Over. Im using KNIME 3.2 on Windows 10 Prof.
Yoe can reproduce it as follows: Create a WF with 'Table Creator'-> 'Java Script Bar Chart', where the 'Table Creator' creates a Table having one column with values: 'a','a','a','b'b'.
Executing the 'Java Scripr Bar Chart' node ends with a view showing NO bars - but some other chart information. Moving the mouse over the empty area (where you would expect the graphic) , shows the bars.