echarts在tooltip中换行操作

echarts在tooltip中换行操作就是操作html标签

tooltip: {
  trigger: 'axis',
  formatter: function (params) {
    let paramsEquity = params[0];
    var date = new Date(paramsEquity.name);
    let paramsBalance = params[1]
    return '<span style="float:left;">' + date.getFullYear() + '/' + (date.getMonth() + 1) + '/' + date.getDate() + '</span></br>' + '<span style="float:left;">净值: ' + paramsEquity.value[1] + '</span></br>' + '<span style="float:left;">余额: ' + paramsBalance.value[1] + '</span';
  },
  axisPointer: {
    animation: false
  }
},