HTML5 Canvas + Javascriptで図形を描く- 千葉商科大 Web動画表現. 4,008 views. Share; Like; Download

So, let's look at the doyellow JavaScript function and see how to make yellow rectangles appear by using the canvas. The first step is going to be that rather than drawing in the canvas, we're going to have to access the context of the canvas. That's a new concept for canvases, that the graphics are actually displayed in the canvas's context.

// Get Image Data Object. 10. Microsoft Edge, Safari, Chrome och Firefox är standard för HTML5 som Avancerade CSS- och JavaScript-användare: Canvas utgåvor kan  Your browser does not support the HTML5 canvas tag. 8