echarts中的一些配置

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下面配置渐变色的地方，new echarts.graphic.LinearGradient中的echarts为自己定义的echarts对象（var echarts = require("echarts/lib/echarts");）option: {         // 提示         tooltip: {           trigger: "axis",           // 设置tooltip的样式           formatter: function(datas) {             var res = datas[0].name + "<br/>",               val;             for (var i = 0, length = datas.length; i < length; i++) {               val = datas[i].value / 100 + "%";//百分比               // datas[i].marker是文字前面的icon               res += datas[i].marker +" "+ datas[i].seriesName + "：" + val + "<br/>";             }             return res;           }         },         //color跟legent对应，颜色就是icon的颜色         color: ["#4472C5", "#ED7C30"],         legend: {           icon: "circle",//y圆形           data: ["策略收益", "沪深300"],           left: "4%",           itemHeight: 9, //改变圆圈大小           textStyle: {             fontSize: 14,             color: "#B6B9BE",             rich: {               b: { color: "red" }             }           }         },         // 具体上下左右的距离         grid: {           top: "20%",           left: "0%",           right: "8%",           bottom: "6%",           containLabel: true         },         // 下载按钮         toolbox: {           // feature: {           //     saveAsImage: {}           // }         },         // x轴配置         xAxis: [           {             type: "category",             axisLabel: {               //  interval: 0,  //控制坐标轴刻度标签的显示间隔.设置成 0 强制显示所有标签。设置为 1，隔一个标签显示一个标签。设置为2，间隔2个标签。以此类推               rotate: 0, //倾斜度 -90 至 90 默认为0               textStyle: {                 fontWeight: "", //加粗                 color: "#ACACAC" //黑色               },               // 只显示首位两个数据               margin: 10,               interval: 100000,               showMinLabel: true,               showMaxLabel: true             },             // axisLine坐标轴轴线相关设置:             axisLine: {               show: false, // 不显示x轴               symbol: [{ default: "none" }], // 可以是字符串，表示两端使用同样的箭头；或者长度为 2 的字符串数组，分别表示两端的箭头。默认不显示箭头，即 'none'。两端都显示箭头可以设置为 'arrow'，只在末端显示箭头可以设置为 ['none', 'arrow']。               // axisLine坐标轴轴线样式设置               lineStyle: {                 color: "#333", // 坐标轴轴线颜色设置                 width: 1 // 坐标轴线线宽。               }             },             boundaryGap: false, //是否从零刻度开始             data: [               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190601",               "20190701"             ],             axisTick: { show: false, length: 0 }           }         ],         yAxis: [           {             type: "value",             axisTick: { show: false },             axisLine: { show: false },             axisLabel: {               //  interval: 0,  //控制坐标轴刻度标签的显示间隔.设置成 0 强制显示所有标签。设置为 1，隔一个标签显示一个标签。设置为2，间隔2个标签。以此类推               rotate: 0, //倾斜度 -90 至 90 默认为0               textStyle: {                 fontWeight: "", //加粗                 color: "#ACACAC" //黑色               },               formatter: "{value}%"             },             splitLine: {               show: true,               lineStyle: { type: "solid", color: ["#E7E7E7"], width: 1 }             }           }         ],         series: [           {             name: "策略收益",             type: "line",             // stack刪除后y軸数据才能让对应             // stack: "总量",             showSymbol: false,             hoverAnimation: false,             // 使用圆滑曲线             smooth: true,             yAxisIndex: 0,             itemStyle: {               normal: {                 // label: {                 //         show: true,                 //         position: 'top',                 //         formatter: '{b}\n{c}%',                 //     },                 lineStyle: {                   color: "#F99037"                 }               }             },             // 背景区域渐变色             areaStyle: {               normal: {                 color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [                   {                     //折线图颜色渐变                     offset: 0,                     color: "#FEE9D7"                   },                   {                     offset: 1,                     color: "#FFFBF8"                   }                 ])               }             },             data: [               "-50",               "152",               "120",               "152",               "192",               "179",               "146",               "158",               "150",               "126",               "179",               "204",               "186",               "177",               "192",               "182",               "162",               "178",               "240",               "209",               "187",               "164",               "192",               "182",               "152",               "92"             ]           },           {             name: "沪深300",             type: "line",             // stack: "总量",             showSymbol: false,             hoverAnimation: false,             smooth: true,             yAxisIndex: 0,             itemStyle: {               normal: {                 lineStyle: {                   color: "#3979BB"                 }               }             },             areaStyle: {               normal: {                 color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [                   {                     //折线图颜色渐变                     offset: 0,                     color: "#FEE9D7"                   },                   {                     offset: 1,                     color: "#FFFBF8"                   }                 ])               }             },             data: [               "92",               "72",               "120",               "92",               "60",               "89",               "82",               "68",               "98",               "86",               "79",               "84",               "76",               "87",               "62",               "72",               "82",               "98",               "86",               "79",               "87",               "74",               "82",               "62",               "82",               "62"             ]           }         ]       }     };