JSFiddle - React, Tailwind, and code Playground

HTML

<iframe id="frame" style="width: 250px; border: solid 1px red;" ></iframe>

JavaScript

var elFrame = $('#frame')[0];
$(elFrame.contentWindow).resize(function() {
$(window).trigger('zoom');
});

$(window).on('zoom', function() {
alert('zoom  :' + window.devicePixelRatio*100 + '%');
});