Being loquacious, I often overflow my alloted time and space.
Terse and Consise.
Hide that unsightly content that is busting at the seams in a fashionable girdle
CSS requirements - make a 'preview' and a 'fullview' class. Preview should limit what is displayed and fullview styles the popup.
View Souce on this page to see CSS and JS Snippet
Multiple demos shows various uses.
Project Source Code on GitHub