Highcharts Demo

author(s): Torstein Hønsi

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/series-label.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>

<div id="container"></div>

CSS

#container {
	min-width: 310px;
	max-width: 800px;
	height: 400px;
	margin: 0 auto
}

JavaScript

Highcharts.chart('container', {
   tooltip: {
  formatter: function() {
  console.log(this);
    return 'The real value is <b>'+ this.key+ '</b>';
  }
},

    series: [{
        name: 'a',
        data: [{name:10,y:20},20,{name:'-10',y:0},10,0,10,0,15]
    }]

});