Tooltip and Legend don't have formatter option

[9teen90nine]

Hi!
I was building a quick demo and found out that the tooltip and legend don't have any options for formatting. For my stacked bar chart, legend is empty, for example. It would be great if tooltip and legend had a formatting option like axes do.

[QingWei-Li]

You can customize the tooltip demo.

I would consider adding a format option to legend.

[9teen90nine]

@QingWei-Li I know, but you have to create a full custom tooltip for that. All I need for my demo is to format time series data from timestamps (needed to plot the chart correctly) to something more human-readable. I've created a date formatter which I pass to x-axis, and it would be great if I could just use the same formatter for tooltip or legend. Here's my demo: https://codesandbox.io/s/cubejs-vue-demo-9r5xl