echarts

y轴百分比 在yAxis中加上 formatter: ‘{value} %’

yAxis: {
                type: 'value',
                axisLabel: {
                    show: true,
                    interval: 'auto',
                    formatter: '{value} %'//纵坐标百分比
                }
            },

数据百分比 在option 中加上

 tooltip: {
                trigger: 'axis',
                formatter: '{b0}<br/>{a0}: {c0}%<br />{a1}: {c1}%<br />{a2}: {c2}%<br />{a3}: {c3}%<br />{a4}: {c4}%'//展示百分比  五条折线
            },

代码

<div id="main" style="width: 90%; height: 600px;margin:20px auto;"></div>

 var myChart = echarts.init(document.getElementById('main'),'dark');//dark设置背景色  默认白色
        myChart.clear();//清除


    var formatter = '{b0}';//展示百分比
    var j = 0;
    for(var k = 0; k < 5; k ++){//折线数不确定  假设有五条
        formatter += '<br/>{a'+j+'}: {c'+j+'}%';
        j ++;
    }

        option = {
            title: {
                text: '折线图堆叠'
            },
            tooltip: {
                trigger: 'axis',
                formatter: formatter //展示百分比
            //    //'{b0}<br/>{a0}: {c0}%<br />{a1}: {c1}%<br />{a2}: {c2}%<br />{a3}: {c3}%<br />{a4}: {c4}%'  五条折线
            },
            legend: {
                data: ['邮件营销', '联盟广告', '视频广告', '直接访问', '搜索引擎']
            },
            grid: {
                left: '3%',
                right: '4%',
                bottom: '3%',
                containLabel: true
            },
            toolbox: {
                feature: {
                    saveAsImage: {}
                }
            },
            xAxis: {
                type: 'category',
                boundaryGap: false,
                data: ['周一', '周二', '周三', '周四', '周五', '周六', '周日']
            },
            yAxis: {
                type: 'value',
                axisLabel: {
                    show: true,
                    interval: 'auto',
                    formatter: '{value} %'//纵坐标百分比
                }
            },
            series: [
                {
                    name: '邮件营销',
                    type: 'line',
                    stack: '总量',
                    data: [120, 132, 101, 134, 90, 230, 210]
                },
                {
                    name: '联盟广告',
                    type: 'line',
                    stack: '总量',
                    data: [220, 182, 191, 234, 290, 330, 310]
                },
                {
                    name: '视频广告',
                    type: 'line',
                    stack: '总量',
                    data: [150, 232, 201, 154, 190, 330, 410]
                },
                {
                    name: '直接访问',
                    type: 'line',
                    stack: '总量',
                    data: [320, 332, 301, 334, 390, 330, 320]
                },
                {
                    name: '搜索引擎',
                    type: 'line',
                    stack: '总量',
                    data: [820, 932, 901, 934, 1290, 1330, 1320]
                }
            ]
        };

        myChart.setOption(option);