Stacking items on the same series

What problem does this feature solve?

Currently it’s possible to stack items using multiple series:

const series = [
  {type: 'bar', data: [10], stack: '2020'},
  {type: 'bar', data: [15], stack: '2020'}
]

However, if I only need one series with multiple items but want to show those items stacked it’s not possible. I need to create multiple series with just one item in each to accomplish that.

What does the proposed API look like?

It’d be great if I could do something like this:

const series = [ {type: ‘bar’, data: [10, 15], stack: true} ]

[Ovilia]

It should be 4 series (LONDON, MANCHESTER, NY, SEATTLE) and the previous two should be set with stack: 'uk'. xAxis should be with type 'category' and with data ['2020', '2021'].

[Ovilia]

Sorry, we do not have consulting servives. But you are welcomed to send emails to [e-mail] for such questions.