JSFiddle - React, Tailwind, and code Playground
HTML
Click me
JavaScript
document.onclick=function() {
var popup = open("about:blank", 'bob');
setTimeout(function() {
// let the popup load (no load event)
popup.document.body.innerHTML = '<p>Hello World</p>';
var elem = $('p', popup.document);
var text;
try {
text = "width = " + elem.width();
} catch (e) {
text = e.toString();
}
popup.close();
alert(text);
}, 100);
}