---
components:
    - rx.recharts.FunnelChart
    - rx.recharts.Funnel
---

# Funnel Chart

```python exec
import reflex as rx
from pcweb.templates.docpage import docdemo, docgraphing
import random

data = [
  {
    "value": 100,
    "name": "Sent",
    "fill": "#8884d8"
  },
  {
    "value": 80,
    "name": "Viewed",
    "fill": "#83a6ed"
  },
  {
    "value": 50,
    "name": "Clicked",
    "fill": "#8dd1e1"
  },
  {
    "value": 40,
    "name": "Add to Cart",
    "fill": "#82ca9d"
  },
  {
    "value": 26,
    "name": "Purchased",
    "fill": "#a4de6c"
  }
]

funnel_chart_state = """class FunnelState(rx.State):
    data=data

    def randomize_data(self):
        self.data[0]["value"] = 100
        for i in range(len(self.data)-1):
            self.data[i+1]["value"] = self.data[i]["value"] - random.randint(0, 20)
"""
exec(funnel_chart_state)

funnel_chart_example = """rx.recharts.funnel_chart(
                rx.recharts.funnel(
                    rx.recharts.label_list(position="right", data_key="name", fill="#000", stroke="none"),
                    rx.recharts.label_list(position="right", data_key="name", fill="#000", stroke="none"),
                    data_key="value",
                    data=data
                ),
                rx.recharts.graphing_tooltip(), 
                width=730, 
                height=250)"""

funnel_chart_example_with_state = """rx.recharts.funnel_chart(
                rx.recharts.funnel(
                    rx.recharts.label_list(position="right", data_key="name", fill="#000", stroke="none"),
                    data_key="value",
                    data=FunnelState.data,
                    on_click=FunnelState.randomize_data,
                ),
                rx.recharts.graphing_tooltip(), 
                width=1000, 
                height=250)"""

```

A funnel chart is a graphical representation used to visualize how data moves through a process. In a funnel chart, the dependent variable’s value diminishes in the subsequent stages of the process. It can be used to demonstrate the flow of users through for example a business or sales process.

```python eval
docgraphing(
  funnel_chart_example, 
  comp = eval(funnel_chart_example),
  data =  "data=" + str(data)
)
```

Here is an example of a funnel chart with a `State`. Here we have defined a function `randomize_data`, which randomly changes the data when the graph is clicked on using `on_click=FunnelState.randomize_data`.

```python eval
docdemo(funnel_chart_example_with_state,
        state=funnel_chart_state,
        comp=eval(funnel_chart_example_with_state),
        context=True,
)
```