JSFiddle - React, Tailwind, and code Playground

HTML

<iframe src="http://www.irs.gov/pub/irs-pdf/fw4.pdf" name="myPdfFrame" id="myPdfFrame"></iframe>

CSS

html {
	height: 100%;
}
body {
	margin: 0;
	padding: 0;
	height: 100%;
}
iframe {
    padding: 0;
    margin: 0;
    width: 99%;
    height: 98%;
}

JavaScript

window.frames.myPdfFrame.print();