javascript how to get the total scrollable height code example

Example 1: get current scroll height javascript

document.documentElement.scrollTop || document.body.scrollTop

Example 2: javascript get body height

var body = document.body,
    html = document.documentElement;

var height = Math.max( body.scrollHeight, body.offsetHeight, 
                       html.clientHeight, html.scrollHeight, html.offsetHeight );

Example 3: get current scroll height javascript

document.documentElement.scrollTop = document.body.scrollTop = 1000;