Anybody idea for funnel by bar chart

[charian]

What problem does this feature solve?

Please help for made funnel chart. I'm making a funnel report using a bar chart.

As you can see in the code, I'm making it without big problems. But I want to represent the converted area, but I can't think of a way. Help me with any ideas.

What does the proposed API look like?

option = {
    tooltip : {
        trigger: 'item',
        axisPointer : {            // 坐标轴指示器，坐标轴触发有效
            type : 'shadow'        // 默认为直线，可选为：'line' | 'shadow'
        }
    },
    legend: {
        data:['converted','dropoff'],
        bottom: 0
    },
    itemStyle: {},
    barWidth: '100px',
    label: {
        show: true
    },
    grid: {
        left: '3%',
        right: '4%',
        bottom: '7%',
        containLabel: true
    },
    xAxis : [
        {
            type : 'category',
            data : ['step1','step2','step3','step4','step5']
        }
    ],
    yAxis : [
        {
            type : 'value',
            data: ['20%', '40%', '60%', '80%', '100%'],
            offset: 10
        }
    ],
    series : [
        {
            name:'converted',
            type:'bar',
            stack: 'funnel',
            data:[220, 132, 101, 72, 10],
            itemStyle: {
                color: '#229AE8',
            },
            label: {
                position: 'insideTop'
            },
            z: 1
        },
        {
            name:'dropoff',
            type:'bar',
            stack: 'funnel',
            data:[0, 88,31, 29, 62],
            itemStyle: {
                color: '#C2E7FF'
            },
            label: {
                show: false,
                position: 'top',
                color: '#229AE8'
            },
            z: 1,
            markPoint : {
                silent: true,
                data : [
                    {
                        value : 0, 
                        xAxis: 0, 
                        yAxis: 220,

                    },
                    {
                        value : 88, 
                        xAxis: 1, 
                        yAxis: 220

                    },
                    {
                        value : 31, 
                        xAxis: 2, 
                        yAxis: 132

                    },
                    {
                        value : 29, 
                        xAxis: 3, 
                        yAxis: 101

                    },
                    {
                        value : 62, 
                        xAxis: 4, 
                        yAxis: 72

                    }
                ]
            }
        }

    ]
};

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