check screen width js code example

Example 1: javascript screen size

var w = window.innerWidth;
var h = window.innerHeight;

Example 2: get screen width javascript

window.screen.width
//or just
screen.width

Example 3: get the size of the screen javascript

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

Example 4: js know size of screen

alert("Your screen resolution is: " + screen.width + "x" + screen.height)