echarts双y轴折线图 图例样式设置

drawenergyline(){
            this.energyline = echarts.init(document.getElementById('energyline'));
            this.energyline.setOption({
                color:['#22D5FF','#FFD836'],
                tooltip: {
                    trigger: "axis",
                    axisPointer: {
                    type: 'shadow'
                    },
                    // formatter: '{a0}: {c0}%<br />{a1}: {c1}%',
                    backgroundColor:'#2A3036',
                    borderColor:'#2A3036',
                    textStyle:{
                    color:'#fff',
                    }
                },
                legend: {
                    data: ['用电量', '用气量'],
                    // 图例样式 
                    icon: 'rect',
                    itemWidth: 14,
                    itemHeight: 3,
                    textStyle:{
                        fontSize: 14,//字体大小
                        color: '#ffffff'//字体颜色
                    },
                },
                grid: {
                    top:30,
                    right:'10%',
                    bottom:'10%',
                    left:'10%'
                    // containLabel: true
                },
                xAxis: {
                    data: ['11-24', '11-25', '11-26', '11-27', '11-28'],
                    axisLine: {
                        show: false, //隐藏X轴轴线
                    },
                    axisTick: {
                        show: false //隐藏X轴刻度
                    },
                    axisLabel: {
                        show: true,
                        margin: 14,
                        fontSize: 14,
                        textStyle: {
                            color: "#fff" //X轴文字颜色
                        }
                    },
                },
                yAxis : [
                    {
                        type : 'value',
                        name : '用电量（kw.h）',
                        nameTextStyle: {
                            color: "#fff",
                            nameLocation: "start",
                        },
                        axisLabel : {
                            // formatter: '{value}',
                            textStyle:{
                                color:'#fff',
                                fontSize: 12,
                            }
                        },
                        axisLine:{
                            show:false,
                        },
                        axisTick:{
                            show:false,
                        },
                        splitLine:{
                            show:false,
                            lineStyle:{
                                color:'#D4D4D8'
                            }
                        }
                    },
                    {
                        type : 'value',
                        name : '用气量（m3）',
                        nameTextStyle: {
                            color: "#fff",
                            nameLocation: "start",
                        },
                        axisLabel : {
                        formatter: '{value} ',
                            textStyle:{
                                color:'#fff',
                                fontSize: 12,
                            }
                        },
                        axisLine:{
                            show:false
                        },
                        axisTick:{
                            show:false,
                        },
                        splitLine:{
                            show:true,
                            lineStyle:{
                                color:'#11366e'
                            }
                        }
                    }
                ],
                series: [
                    {
                        name:'用电量',
                        type:'line',
                        // symbol:'circle',
                        // symbolSize: 5,
                        yAxisIndex: 0,
                        smooth: true, //是否平滑
                        itemStyle: {
                            normal: {
                                color:'#22D5FF',
                                lineStyle: {
                                    color: "#22D5FF",
                                    width:1
                                },
                                areaStyle: {
                                    color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                                    { offset: 0, color: "#22D5FF" },
                                    { offset: 1, color: "#151855" }
                                    ])
                                },
                            }
                        },
                        data:[15, 23, 65, 6, 45, 23, 56]
                    },
                    {
                        name:'用气量',
                        type:'line',
                        // symbol:'circle',
                        // symbolSize: 5,
                        yAxisIndex: 1,
                        smooth: true, //是否平滑
                        itemStyle: {
                            normal: {
                                color:'#FFD836',
                                lineStyle: {
                                    color: "#FFD836",
                                    width:1
                                },
                                areaStyle: {
                                    color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                                    { offset: 0, color: "#FFD836" },
                                    { offset: 1, color: "#151855" }
                                    ])
                                },
                            }
                        },
                    data:[50, 65, 40, 50, 60, 70, 80]
                    },
                ]
            },true)
        },