Clarification note about JS usage for canvas.
Clarification note about JS usage for canvas.
macmillanpublishers/HTMLBook,gitenberg-dev/HTMLBook,wastemobile/HTMLBook,gitenberg-dev/HTMLBook,gitenberg-dev/HTMLBook,macmillanpublishers/HTMLBook,oreillymedia/HTMLBook,mushroomgithub/HTMLBook,mushroomgithub/HTMLBook,oreillymedia/HTMLBook,mushroomgithub/HTMLBook,macmillanpublishers/HTMLBook,wastemobile/HTMLBook,oreillymedia/HTMLBook