The Memory (aka Concentration) Game
examples of programmer-defined functions and programmer-defined objects
how to draw polygons on the canvas using moveTo and lineTo along with Math trig methods
guidance on how to use a form to show information to players
a method for drawing text with a specified font on the canvas
instructions about how to draw images on the canvas
using setTimeout to force a pause
employing Date objects to compute elapsed time
The applications demonstrated ways to represent information to implement two versions of a familiar game. The next chapter will temporarily depart from the use of canvas to demonstrate dynamic creation and positioning of HTML elements. It also will feature the use of HTML5’s video element.
KeywordsElapse Time Image File Event Handling Draw Method Photo Version
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