Why canvas doesn't work with jQuery selector?

Question

I have made simple example of using canvas and then I saw that my code doesn\'t work when I use jQuery selector.

Examples:

Javascript

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Answer 1

This code...

var canvas = $('#myCanvas');
var ctx = canvas.getContext('2d');

Needs to be...

var canvas = $('#myCanvas');
var ctx = canvas[0].getContext('2d');