I have the following for tooltip set in my chart:
tooltip: {
crosshairs: true,
formatter: function () {
return '<b>' + Highcharts.dateFormat('%m/%d/%Y %l:%M:%S %p', this.x) + '</b><br/>' +
this.series.name + ': ' + Highcharts.numberFormat(this.y, 2) + metricUnit;
}
However, when viewed within IE9, everything appears on the same line. As if the <br/> is being ignored. Other browsers including IOS shows the tooltip correctly. Anything I can try?