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Chapter 6. HTML5 Canvas > Canvas Limitations
6.3. Canvas Limitations
There are a few limitations to using Canvas, some of which come with the low-level territory it occupies:
The lack of data structure for visual elements means that you must create your own objects in JavaScript to update the positions and other attributes of nonstatic graphical items.
Related to the preceding point, you cannot apply events (like mouse clicks) to items drawn within Canvas, as they do not exist as tangible entities; they are just transient drawing operations. You must program such functionality.
You must have a good knowledge of JavaScript to fully exploit Canvas.
