detect screen size html code example

Example 1: get window resolution javascript

var clientWidth = document.documentElement.clientWidth;
 $("h2").text(clientWidth);

Example 2: java script find screen size of device

// Size of browser viewport.
$(window).height();
$(window).width();

// Size of HTML document (same as pageHeight/pageWidth in screenshot).
$(document).height();
$(document).width();