how to find screen size using javascript code example

Example 1: get the size of the screen javascript

window.screen.height;
window.screen.width;

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();

Example 3: js detect screen size change

window.onresize = function(){
console.log("resize");
}

Example 4: js know size of screen displayed

var win = window,
    doc = document,
    docElem = doc.documentElement,
    body = doc.getElementsByTagName('body')[0],
    x = win.innerWidth || docElem.clientWidth || body.clientWidth,
    y = win.innerHeight|| docElem.clientHeight|| body.clientHeight;
alert(x + ' × ' + y);