Select a vertical area on a chart

[danidin]

I created the following feature using C3 & jQuery:
http://jsfiddle.net/prqwrjtq/2/

You can select an area on the chart. I would like to implement this ability as C3 API. It would accept a callback with start and end points as arguments, so a user can select an area on the chart between two data points and get a response to their selection.

e.g

c3.generate({
  ...
  areaselect: {
    enabled: true,
    onselect: function(a, b) {
      // do something with data points here
    },
    color: #999999 // selector color
  }
})

How would one go about this?

[bsarkadi]

It would be useful for me.

[ghost]

this is actual requirement which I'm having now. Would be great If I get this as C3 Api.
I'm using reactJS for developing application.