echarts 曲线图自定义提示框

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>曲线图</title><!-- 引入 ECharts 库 --><script src="https://cdn.jsdelivr.net/npm/echarts@5.3.0/dist/echarts.min.js"></script><style>/* 设置图表容器的大小 */#main {width: 800px;height: 600px;margin: 0 auto;}</style>
</head><body><!-- 图表容器 --><div id="main"></div><script>// 你的 JavaScript 函数function updateChart () {var chartDom = document.getElementById('main')var myChart = echarts.init(chartDom)// 示例数据var jsonData = [{ time: '2024-01-01', name: 'Series1', kongshen: 100, yongshuiliang: 50, leijifangshuiliang: 200, wendu: 25, shuiya: 1.5, CH4: 10 },{ time: '2024-01-02', name: 'Series2', kongshen: 120, yongshuiliang: 55, leijifangshuiliang: 220, wendu: 26, shuiya: 1.6, CH4: 12 },{ time: '2024-01-03', name: 'Series3', kongshen: 130, yongshuiliang: 60, leijifangshuiliang: 240, wendu: 27, shuiya: 1.7, CH4: 14 }]var timeData = []var series = []var kongshenData = []var yongshuiliangData = []var leijifangshuiliangData = []var wenduData = []var shuiyaData = []var CH4Data = []for (var i = 0; i < jsonData.length; i++) {var item = jsonData[i]timeData.push(item.time)kongshenData.push(item.kongshen)yongshuiliangData.push(item.yongshuiliang)leijifangshuiliangData.push(item.leijifangshuiliang)wenduData.push(item.wendu)shuiyaData.push(item.shuiya)CH4Data.push(item.CH4)series.push({name: item.name,type: 'line',stack: 'Total',data: [item.kongshen, item.yongshuiliang, item.leijifangshuiliang, item.wendu, item.shuiya, item.CH4],lineStyle: {width: 4, // 设置折线宽度为4（加粗）}})}var option = {title: {// text: '名称'},tooltip: {trigger: 'axis',formatter: function (params) {var html = '';params.forEach(function (param) {var name = param.seriesName;var value = param.value;var unit = '';var color = param.color;switch (name) {case '孔深':unit = 'm';break;case '涌水量':unit = 'm³/h';break;case '水温':unit = '℃';break;case '水压':unit = 'MPa';break;case '累计放水量':unit = 'm³';break;case 'CH4':unit = '%';break;default:break;}html += '<span style="color:' + color + '">&#x25cf;</span> ' + name + ': ' + value + ' ' + unit + '<br>';});return html;
}},legend: {data: ['孔深', '涌水量', '累计放水量', '水压', '水温', 'CH4'],textStyle: {color: 'blue' // 设置图例文字颜色为白色},formatter: function (name) {if (name == '孔深') {return name + '(m)'} else if (name == '涌水量') {return name + '(m³/h)'} else if (name == '水温') {return name + '(℃)'} else if (name == '水压') {return name + '(MPa)'} else if (name == '累计放水量') {return name + '(m³)'} else {return name + '(%)'}}},grid: {left: '3%',right: '4%',bottom: '3%',containLabel: true},toolbox: {feature: {saveAsImage: {}}},xAxis: {type: 'category',boundaryGap: false,data: timeData},yAxis: [{type: 'value'}],series: [{name: '孔深',type: 'line',stack: 'Total',data: kongshenData,lineStyle: {normal: {width: 4, // 设置折线宽度为4（加粗）}}},{name: '涌水量',type: 'line',stack: 'Total',data: yongshuiliangData,lineStyle: {normal: {width: 4, // 设置折线宽度为4（加粗）}}},{name: '累计放水量',type: 'line',stack: 'Total',data: leijifangshuiliangData,lineStyle: {normal: {width: 4, // 设置折线宽度为4（加粗）}}},{name: '水压',type: 'line',data: shuiyaData,lineStyle: {normal: {width: 4, // 设置折线宽度为4（加粗）}}},{name: '水温',type: 'line',data: wenduData,lineStyle: {normal: {width: 4, // 设置折线宽度为4（加粗）}}},{name: 'CH4',type: 'line',data: CH4Data,lineStyle: {normal: {width: 4, // 设置折线宽度为4（加粗）}}}]}option && myChart.setOption(option)}// 在页面加载完毕后执行函数window.onload = function () {// 调用你的函数updateChart()};</script>
</body></html>

主要代码就是

  formatter: function (params) {var html = ''params.forEach(function (param) {var name = param.seriesNamevar value = param.valuevar unit = ''var color = param.colorswitch (name) {case '孔深':unit = 'm'breakcase '涌水量':unit = 'm³/h'breakcase '水温':unit = '℃'breakcase '水压':unit = 'MPa'breakcase '累计放水量':unit = 'm³'breakcase 'CH4':unit = '%'breakdefault:break}html += '<span style="color:' + color + '">&#x25cf;</span> ' + name + ': ' + value + ' ' + unit + '<br>'})return html}

效果如下