rect 底部echarts 配置项内容和展示

      option = {
    graphic: {
        elements: [{
            type: 'group',
            left: 0,
            top: 0,
            width: '100%',
            height: '100%',
            children: [{
                type: 'rect',
                left: 100,
                bottom: 20,
                shape: {
                    width: 200,
                    height: 50
                },
                style: {
                    fill: 'red'
                }
            }]
        }]
    }
}