Created with Fable REPL

fable-repl.fs

module Recharts

open Fable.Core.JsInterop
open Fable.Recharts
open Fable.Recharts.Props
open Fable.React
open Elmish
open Elmish.React
module R = Fable.React.Standard
module P = Fable.React.Props
module H = Fable.React.Helpers

type PieData =
    { name: string
      value: int }

let pieData = [|
    { name= "Group A"; value= 400 }
    { name= "Group B"; value= 300 }
    { name= "Group C"; value= 300 }
    { name= "Group D"; value= 200 }
|]

type Model =
    { Data: PieData array
      ActiveIndex: int }

type Msg =
    | Refresh
    | SetActiveIndex of int

let init () =
    { Data = pieData
      ActiveIndex = 0 },
    Cmd.none

// UPDATE

let rnd =
    let random = System.Random()
    fun min max -> random.Next(min, max)

let randomizePieData (data: PieData) =
    { data with value = rnd 200 800 }

let update (msg:Msg) (model:Model) =
    match msg with
    | Refresh ->
        { model with Data =  pieData |> Array.map randomizePieData }, Cmd.none
    | SetActiveIndex index ->
        { model with ActiveIndex = index }, Cmd.none

// VIEW (rendered with React)

type ActiveShapeProps =
    { cy: float
      cx: float
      midAngle: float
      innerRadius: float
      outerRadius: float
      startAngle: float
      endAngle: float
      fill: string
      payload: obj
      percent: float
      value: float }

type Pie =
    | ActiveIndex of int
    | ActiveShape of (ActiveShapeProps -> ReactElement)
    | OnMouseEnter of (obj -> int -> unit)
    interface P.IProp

let renderActiveShape (props: ActiveShapeProps) =
    let radian = System.Math.PI / 180.
    let sin = sin (-radian * props.midAngle)
    let cos = cos (-radian * props.midAngle)
    let sx = props.cx + (props.outerRadius + 10.) * cos
    let sy = props.cy + (props.outerRadius + 10.) * sin
    let mx = props.cx + (props.outerRadius + 30.) * cos
    let my = props.cy + (props.outerRadius + 30.) * sin
    let ex = mx + (if cos >= 0. then 1. else -1.) * 22.
    let ey = my
    let textAnchor = if cos >= 0. then "start" else "end"
    R.g [] [
        text [
            P.X props.cx
            P.Y props.cy
            P.Dy 8.
            Text.TextAnchor "middle"
            P.Fill props.fill
        ] [
            H.str props.payload?name
        ]
        sector [
            Polar.Cx props.cx
            Polar.Cy props.cy
            Polar.InnerRadius props.innerRadius
            Polar.OuterRadius props.outerRadius
            Polar.StartAngle props.startAngle
            Polar.EndAngle props.endAngle
            P.Fill props.fill
        ]
        sector [
            Polar.Cx props.cx
            Polar.Cy props.cy
            Polar.StartAngle props.startAngle
            Polar.EndAngle props.endAngle
            Polar.InnerRadius (props.outerRadius + 6.)
            Polar.OuterRadius (props.outerRadius + 10.)
            P.Fill props.fill
        ]
        R.path [
            P.D (sprintf "M%f,%fL%f,%fL%f,%f" sx sy mx my ex ey)
            P.Stroke props.fill
            P.Fill "none"
        ] []
        R.circle [
            Polar.Cx ex
            Polar.Cy ey
            P.R 2.
            P.Fill props.fill
            P.Stroke "none"
        ] []
        text [
            P.X (ex + (if cos >= 0. then 1. else -1.) * 12.)
            P.Y ey
            Text.TextAnchor textAnchor
            P.Fill "#333"
        ] [
            H.str (sprintf "PV %.0f" props.value)
        ]
        text [
            P.X (ex + (if cos >= 0. then 1. else -1.) * 12.)
            P.Y ey
            P.Dy 18.
            Text.TextAnchor textAnchor
            P.Fill "#999"
        ] [
            H.str (sprintf "(Rate %.2f%%)" props.percent)
        ]
    ]

let view model dispatch =
    R.div [] [
        R.h1 [] [
            H.str "Sample with Recharts and Elmish"
        ]
        R.p [] [
            H.str "Ported from: http://recharts.org/en-US/examples/CustomActiveShapePieChart"
        ]
        R.button [
            P.OnClick (fun _ -> dispatch Refresh)
        ] [ H.str "Refresh" ]
        pieChart [
            Chart.Width 800.
            Chart.Height 400.
        ] [
            pie [
                Polar.DataKey "value"
                Pie.ActiveIndex model.ActiveIndex
                Pie.ActiveShape renderActiveShape
                Polar.Data model.Data
                //Polar.AnimationBegin 10.
                //Polar.AnimationDuration 500.
                Polar.Cx 300.
                Polar.Cy 200.
                Polar.InnerRadius 60.
                Polar.OuterRadius 80.
                P.Fill "#8884d8"
                Pie.OnMouseEnter (fun _ index ->
                    dispatch (SetActiveIndex (int index)))
            ] []
        ]
    ]

// App
Program.mkProgram init update view
|> Program.withConsoleTrace
|> Program.withReact "elmish-app"
|> Program.run

fable-repl.html

<!doctype html>
<html>
<head>
  <title>Fable + Recharts</title>
  <meta http-equiv='Content-Type' content='text/html; charset=utf-8'>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <script src="__HOST__/libs/react.production.min.js"></script>
  <script src="__HOST__/libs/react-dom.production.min.js"></script>
  <script crossorigin src="https://unpkg.com/prop-types@15.7.2/prop-types.min.js"></script>
  <script crossorigin src="https://unpkg.com/recharts@1.8.5/umd/Recharts.min.js"></script>
</head>
<body>
  <div id="elmish-app"></div>
  <script src="bundle.js"></script>
</body>
</html>