No warning when htmlwidget uses head #162
Description
This code:
Line 9 in 6a050b7
looks as though a warning should be issued when an htmlwidget object attempts to put code in the HTML header. That's what rgl currently does, and it just fails to display with no warning.
I've modified rgl (currently in the devel version 1.0.15) to put the shader code elsewhere as a workaround. In case some other htmlwidget uses the header it would make debugging easier if the warning showed up.