How do you migrate a continuous diverging scheme to V3?

[joewdavies]

Trying to migrate this:

      //style
      new ShapeColorSizeStyle({
          colorCol: 'd2011_2021',
          color: (v, r, s) => {
              const stre = sPow
              let t = 0.5
              if (s.min < 0 && v < 0) {
                  t -= stre(v / s.min, streC) / 2
              } else {
                  t += stre(v / s.max, streC) / 2
              }
              //t = 1 - t
              return interpolateRdBu(t)
          },
      }),


    //legend
        new ColorLegend({
            title: 'Change in number of inhabitants',
            ticks: 4,
            width: 290,
            colorRamp: interpolateRdBu,
            invert: false,
            fun: (t, r, s) => {
                const streI = sPowInverse
                if (t < 0.5) return s.min * streI(1 - 2 * t, streC)
                if (t > 0.5) return s.max * streI(2 * t - 1, streC)
                return 0
            },
        })

To V3 and I cant do it for the life of me!

How should it look in V3?

[jgaffuri]

I added a new example in the doc, see:
https://eurostat.github.io/gridviz/docs/reference#color-legend
https://eurostat.github.io/gridviz/examples/legends/colorLegendDiverging.html
https://github.com/eurostat/gridviz/blob/master/examples/legends/colorLegendDiverging.html