柱状图头上带点装饰echarts pictorialBar配置项内容和展示

      // xdata
let xData = ['松山湖','南城','东城','莞城','万江','大朗','大岭山','茶山','道滘', '厚街']
// ydata
let yData = [2900, 2700, 2500, 2300, 2100, 1900, 1700, 1500, 1300, 1100]
// pictorialData
let pictorialData = []
yData.map(v => { pictorialData.push({ value: v, symbolPosition: 'end' }) })


option = {
    backgroundColor:'rgba(0,0,0,.5)',
    tooltip: { trigger: 'axis', axisPointer: { type: 'shadow' } },
    xAxis: [{ 
        type: 'category', 
        data: xData, 
        axisTick: { alignWithLabel: true }, 
        axisLabel: { rotate: 30, textStyle: { fontSize: '90%', color: "#fff" } }, 
        axisLine: { show: false },
        axisTick: false
    }],
    yAxis:[{ 
        type: 'value', 
        name:'单位', 
        nameTextStyle: { color: '#fff', fontSize: '90%', padding: [0, 0, 0, -45]},
        splitLine: { lineStyle: { color: 'rgba(255,255,255, .1)'}}, 
        axisLabel: { textStyle: { fontSize: '90%', color: "#fff" }}, 
        axisLine: { show: false },
        axisTick: false
    }],
    series:[{
        type: 'pictorialBar',
        symbol: 'rect',
        symbolSize: [40, 3],
        symbolOffset: [0, 0],
        itemStyle: {
            color:'#4afefc',
        },
        tooltip: { show: false },
        data: pictorialData
    },{ 
        type: 'bar', 
        barWidth: 40, 
        data: yData, 
        itemStyle: {
            color: params => {
                return new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
                    offset: 0,
                    color: 'rgba(74,254,252,.6)'
                }, {
                    offset: 1,
                    color: 'rgba(74,254,252,0)'
                }])
            }
        },
        
    }]
};