Number formatting in Highcharts with Custom Tooltips

Highcharts is a fantastic library for drawing interactive charts on your website. I've been using it extensively over the past year or two. There are loads of extensibility points, if you don't like the default behaviour or need to change it slightly to fit your requirements, then it's more than likely Highcharts has you covered. Highcharts provides some very sane defaults, however the more you use it and want to push its boundaries the more »

Adding Multiline text to Highcharts

In this post I'm going to detail how to add multiline text (and centre it) in Highcharts. Note: You could do this in pure html - however I'm going to be doing it using the Highcharts renderer (it uses SVG) as I need the text in the SVG. As it will be sent to the server and rendered into a PNG by an SVG-to-Bitmap library (see that post here) If you want to skip ahead »

Using JavaScript to get CSS properties

On a work project using Highcharts, we needed the colours of each series to be “configurable”. Unfortunately on first glance, Highcharts doesn’t supportgetting colours from CSSout of the box. Instead we need write some code to allow us to use JavaScript to get CSS properties, specifically the colour propertyand then give those colours to Highcharts to apply to a series. When creating a chart using Highcharts, we can set the colour »