A spotlight on the AJAX connector functions

A continuation of yesterday's spotlight on the Google Sheets connector and this one focuses on the ajax functionality that RGraph comes with. There are two separate sets of ajax functions - one for svg and one for canvas.

They do anything from fetching a single number to fetching and parsing a json file. There's also a general ajax fetch function so you can get hold of any page you wish to.

When using RGraph you're not limited to the ajax functions that come with RGraph - you can quite happily use your own (or the jquery ajax functions for example).