you may have put zeroclipboard.swf in the wrong place.
check the copy button in the browser. if it new ZeroClipboard($('.btn-copy'))worked fine, you'll see something like this.
<object id="global-zeroclipboard-flash-bridge"
name="global-zeroclipboard-flash-bridge"
type="application/x-shockwave-flash"
data="http://localhost:3000/client/lib/ZeroClipboard.swf?noCache=1432275841705"
height="100%" width="100%">.........</object>
ZeroClipboard.swf. /client/lib/ZeroClipboard.swf - ZeroClipboard.min.js /client/lib - swf .
, .swf / meteor , . , ZeroClipboard, , .swf / . /client - .
, (new ZeroClipboard($('.btn-copy')))? id selector (#) , .