html5 - How to get a canvas element with JQuery? -

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i've read: canvas - use []

var canvas = $("#canvas1")[0]; var x = canvas.getcontext("2d"); x.fillrect(50, 40, 55, 55);  /*var d = $("#div1"); d.css("background-color", "blue");*/

why can element, e. g. <div> id, if want canvas, must use [0]? not work without.


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