The following is the formatter I am using.
Tooltip tooltip = new Tooltip();
tooltip.setxDateFormat("MMM dd, YYYY");
tooltip.setFormatter("function() { var d = new Date(this.x);" + "return " + "'<b>'+this.series.name +'</b><br/>"
+ "<strong>Value :</strong> '+ this.y +'<br/>" + "<strong>Start Date :</strong> '+ this.x; " + "}");
chartConfig.setTooltip(tooltip);
How to:
1) Round of value with two decimal places
2) Using Date Format like Nov 30, 2016
Kindly assist.
Vaadin Charts uses Highcharts on the client side, which means that you can use Highcharts JS APIs for formatting, the following calls should work:
Highcharts.numberFormat(this.y, 2)
Highcharts.dateFormat('%b %d %Y', new Date(this.x))