ECharts特效-折线图上一个光点来回移动

参考地址：https://www.makeapie.com/editor.html?c=xxxcG6NGk0

效果图打开上面的网址就可以看到。

核心代码如下，该效果实现的难点是数据的封装，还有eval函数的使用。代码直接拷贝过去肯定用不了，需要修改，这里主要记录数据的封装过程。

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];
var data_x=[01/04,01/05,01/06,01/07,01/08,01/09,01/10,01/11,01/12,01/13]
var y_evt_2=[12,3,0,0,0,0,0,6,3,0]
var y_evt_3=[4,1,0,0,0,0,0,1,1,0]
var y_evt_4=[8,2,0,0,0,0,0,4,2,0]
var y_evt_5=[0,0,0,0,0,0,0,0,0,0]
var data = [],eachData=[];
for (let i = 0; i <data_x.length ; i++) {
    let tempArr1=[];
    tempArr1[0]=data_x[i]
    tempArr1[1]=y_evt_2[i]
    tempArr1[2]=y_evt_3[i]
    tempArr1[3]=y_evt_4[i]
    tempArr1[4]=y_evt_5[i]
    eachData.push(tempArr1);
}
data=[];
for (let k = 1; k < 5; k++) { //一共四条线，需要四组数据
    let tempArr2 = [];
    for (let j = 0; j < data_x.length; j++) {
        let tempArr3 = [];
        tempArr3[0] = '"' + eachData[j][0] + '"';
        tempArr3[1] = eachData[j][k];
        tempArr2[j] = "["+tempArr3+"]";
    }
    data.push("{coords:[" + tempArr2 + "]}");
}
data=evil("("+"["+data+"]"+")");

option = {
    backgroundColor: '#0e2147',
    grid: {
        left: '5%',
        top: '5%',
        bottom: '5%',
        right: '5%',
    },
    legend: {
        type: "scroll",
        data: "来电量",
        itemWidth: 18,
        itemHeight: 12,
        textStyle: {
            color: "#00ffff",
            fontSize: 14
        },
    },
    yAxis: [{
        type: 'value',
        position: 'left',
        nameTextStyle: {
            color: '#00FFFF'
        },
        splitLine: {
            lineStyle: {
                type: 'dashed',
                color: 'rgba(135,140,147,0.8)'
            }
        },
        axisLine: {
            show: false
        },
        axisTick: {
            show: false
        },
        axisLabel: {
            formatter: '{value}',
            color: '#fff',
            fontSize: 14
        }
    }, ],
    xAxis: [{
        type: 'category',
        axisTick: {
            show: false
        },
        axisLine: {
            show: false,
            lineStyle: {
                color: '#0696f9',
            }
        },
        axisLabel: {
            inside: false,
            textStyle: {
                color: '#fff', // x轴颜色
                fontWeight: 'normal',
                fontSize: '14',
                lineHeight: 22
            }

        },
        data: XName,
    }, ],
    series: [{
        symbolSize: 150,
        symbol: img[2],
        name: '小灯光',
        type: "line",
        data: data1,
        itemStyle: {
            normal: {
                borderWidth: 5,
                color: '#0696f9',
            }
        }
    },
             {
                 name: '滑行的光点',
                 type: 'lines',
                 coordinateSystem: 'cartesian2d',
                 symbolSize: 30,
                 polyline: true,
                 effect: {
                     show: true,
                     trailLength: 0,
                     symbol: "arrow",
                     period: 10, //光点滑动速度
                     symbolSize: 150,
                     symbol: img[0]
                 },
                 lineStyle: {
                     normal: {
                          1,
                         opacity: 0.6,
                         curveness: 0.2
                     }
                 },
                 data: data
             }
            ],
};

//计算表达式的值,等价于eval函数，防止有些网站禁用eval
function evil(fn) {
    var Fn = Function;  //一个变量指向Function，防止有些前端编译工具报错
    return new Fn('return ' + fn)();
}