/* 本图主要效果：折线图最多显示三条，柱状图随便显示与否 */ /* 移除数组中某个元素 */ Array.prototype.remove = function (val) { var index = this.indexOf(val); if (index > -1) { this.splice(index, 1); } }; var obj = {}; var text_data = [ 'http://www.baidu.com', 'https://www.sogou.com', 'http://www.333.com', 'http://www.444.com', 'http://www.555.com', 'http://www.666.com', 'http://www.777.com', 'http://www.888.com', 'http://www.999.com', '外部链接总计', ]; for (var i = 0; i < text_data.length; i++) { if (i > 2 && i < text_data.length - 1) { obj[text_data[i]] = false; } else { obj[text_data[i]] = true; } } obj[text_data[text_data.length - 1]] = true; myChart ? myChart.clear() : ''; myChart.setOption({ tooltip: { trigger: 'axis', backgroundColor: 'rgba(255,255,255,0.8)', axisPointer: { // 坐标轴指示器，坐标轴触发有效 type: 'shadow', // 默认为直线，可选为：'line' | 'shadow' shadowStyle: { color: 'rgba(150,150,150,0.2)', }, }, textStyle: { color: '#666', fontSize: '14px', }, extraCssText: 'width:220px;height:200px;padding:0;box-shadow: 0 0 3px rgba(0, 0, 0, 0.3);"', formatter: function (params) { var htmlStr = ''; for (var i = 0; i < params.length; i++) { var tem = params[i].name; var val = params[i].value; if (tem.indexOf('/') < 0) { tem > 9 ? (tem = tem + ':00 - ' + tem + ':59') : (tem = '0' + tem + ':00 - ' + '0' + tem + ':59'); } val > 0 ? (val = val) : (val = '--'); htmlStr += '

' + '' + '' + params[i].seriesName + '' + '' + val + '' + '

'; } var res = '

' + tem + '' + $('.table-echarts ul.group li.cur').text() + '' + htmlStr + '

'; return res; }, }, textStyle: { color: 'rgb(120, 122, 125)', }, color: [ '#4fa8f9', '#6ec71e', '#f56e6a', '#fc8b40', '#818af8', '#31c9d7', '#f35e7a', '#ab7aee', '#14d68b', '#cde5ff', ], grid: { top: 30, //越大越靠下，默认60 bottom: 70, }, legend: { bottom: 1, itemGap: 15, itemWidth: 9, itemHeight: 10, textStyle: { padding: [0, 0, 0, 8], }, formatter: function (name) { return name.length > 14 ? name.slice(0, 14) + '...' : name; }, selected: obj, data: text_data, }, xAxis: [ { type: 'category', // boundaryGap: false,//坐标轴两边留白策略 axisTick: { alignWithLabel: true, }, axisLabel: { interval: 2, }, axisLine: { lineStyle: { color: '#ddd', }, }, data: [ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', ], }, ], yAxis: [ { type: 'value', axisLine: { lineStyle: { color: 'transparent', }, }, splitLine: { lineStyle: { color: '#eee', }, }, }, ], series: [ { name: 'http://www.baidu.com', type: 'line', symbol: 'circle', symbolSize: '5', data: [8, 1, 1, 0, 0, 3, 2, 0, 6, 3, 1, 4, 7, 3, 7, 15, 11, 3, 8, 3, 2, 5, 4, 7], }, { name: 'https://www.sogou.com', type: 'line', symbol: 'circle', symbolSize: '5', data: [1, 1, 0, 0, 2, 1, 0, 1, 3, 1, 0, 0, 1, 0, 1, 1, 1, 0, 2, 2, 0, 4, 2, 4], }, { name: 'http://www.333.com', type: 'line', symbol: 'circle', symbolSize: '5', data: [1, 3, 0, 0, 0, 1, 1, 0, 0, 1, 2, 1, 3, 1, 1, 1, 1, 0, 2, 0, 2, 1, 1, 1], }, { name: 'http://www.444.com', type: 'line', symbol: 'circle', symbolSize: '5', data: [0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 2, 3, 0, 0, 0, 3, 1, 0, 2, 0, 1, 0, 0], }, { name: 'http://www.555.com', type: 'line', symbol: 'circle', symbolSize: '5', data: [0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 2, 0, 1, 1, 2, 0], }, { name: 'http://www.666.com', type: 'line', symbol: 'circle', symbolSize: '5', data: [0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 1, 0, 0], }, { name: 'http://www.777.com', type: 'line', symbol: 'circle', symbolSize: '5', data: [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1], }, { name: 'http://www.888.com', type: 'line', symbol: 'circle', symbolSize: '5', data: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0], }, { name: 'http://www.999.com', type: 'line', symbol: 'circle', symbolSize: '5', data: [0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0], }, { name: '外部链接总计', type: 'bar', barWidth: '60%', data: [14, 6, 1, 0, 2, 5, 4, 1, 11, 8, 6, 7, 15, 5, 11, 21, 21, 6, 17, 7, 7, 14, 9, 14], }, ], }); let lengthSelectedArr = ['http://www.baidu.com', 'https://www.sogou.com', 'http://www.333.com']; lengthSelectedArr.reverse(); myChart.on('legendselectchanged', function (params) { if (['外部链接总计'].includes(params.name)) return false; let selected = []; console.log(201, params); if (params.selected[params.name]) { lengthSelectedArr.remove(params.name); lengthSelectedArr.unshift(params.name); if (lengthSelectedArr.length > 3) { lengthSelectedArr.length = 3; } } else { lengthSelectedArr.remove(params.name); } let legend_option = this.getOption(); for (let key in params.selected) { if (!['外部链接总计'].includes(key)) { if (lengthSelectedArr.includes(key)) { legend_option.legend[0].selected[key] = true; } else { legend_option.legend[0].selected[key] = false; } } if (params.selected[key] && !['外部链接总计'].includes(key)) { selected.push(key); } } if (selected.length < 1) { legend_option.legend[0].selected[params.name] = true; lengthSelectedArr.unshift(params.name); } this.setOption(legend_option); }); window.onresize = () => (myChart ? myChart.resize() : ''); /* 参考地址 legend限制显示个数，溢出显示省略号，修改默认样式，tooltip动态高度(2019-08-14) https://www.cnblogs.com/wiliam/p/11351518.html Echarts控制至少选中一个图例(2020-12-11) https://blog.csdn.net/DZY_12/article/details/110957084 官网：事件与行为 https://echarts.apache.org/handbook/zh/concepts/event */

限制lenged个数