To check in the HTML inspector of the Developer Tool.
At this moment the style.float and style.cssFloat syntax do exactly the same in at least
Firefox, Chrome, Opera and IE-11 on a Windows-7 desktop.
In order to get the computed value of a float, only the css-syntax of the property is permitted: float (and
not cssFloat or css-float).
The keyword 'float' (floating point variable) was a reserved keyword in older javascript versions, but not more in the modern versions.
See for instance this answer
on stackoverflow.com. I guess it has to do with the distinction between 32-bit floating point numbers
(Float32Array) and 64-bit floating point numbers
(Float64Array).
