javascript - How can I access the canvas element without an id? -


using casperjs, i'm trying testing on canvas, grabbing , using canvas.todataurl();. however, canvas not have id, code looks this:

<div id= 'derp' ...> <canvas ...> </canvas> </div>

can still canvas using 

var canvas = document.getelementbyid(????);

or there better way of grabbing canvas?

you can use css selectors:

document.queryselector('#derp canvas')

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