柱状图-渐变echarts 柱状配置项内容和展示

      option = {
    backgroundColor: 'blue',
    grid: {
        left: '4%',
        right: '4%',
        top: '5%',
        bottom: '3%'
    },
    xAxis: {
        type: 'category',
        axisLabel: {
            formatter: '{value}',
            color: '#65F5FD',
            fontSize: 14
        },
        axisLine: {
            lineStyle: {
                color: 'rgba(255,255,255,0)'
                // color:'65F5FD'
            }
        },
        splitLine: {
            lineStyle: {
                type: 'dashed',
                color: '#385B71'
            }
        },
        data: ['1', '2', '3']
    },
    yAxis: {
        type: 'value',
        splitLine: {
            show: true,
            lineStyle: {
                color: '#DBDBDB',
            }
        },
        axisLine: {
            show: true,
            lineStyle: {
                color: '#DBDBDB',
            }
        },
        axisTick: {
            show: false
        },
        axisLabel: {
            show: false
        }
    },
    series: [{
        type: 'bar',
        barWidth: '20%',
        itemStyle: {
            color: new echarts.graphic.LinearGradient(
                0, 0, 0, 1,
                [{
                        offset: 0,
                        color: '#8EFED4'
                    },
                    {
                        offset: 1,
                        color: '#306ADD'
                    }
                ]
            )
        },
        data: [20, 30, 40]
    }]
};
myChart.setOption(option, true);