how to know full height of windows using javascript code example

Example 1: how to get the height of window in javascript

//get screen height of the device by using
window.innerHeight
//get screen width of the device by using
window.innerWidth

Example 2: get window height javascript

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = 
"Screen width is " + screen.width;
</script>