Determining the Height of a Document Using JavaScript

In my website development process, I have implemented JQuery to style the pages and calculate property values using numbers from javascript functions like window.innerHeight. Everything is functioning well so far. However, I am currently facing a challenge when trying to calculate the height of the document (not just window height), subtract the footer's height, and position a shadow image right above the footer. Safari seems to be giving me inconsistent results, placing the shadow element in random positions each time.

$("div#shadowBottom").css({
"position":"absolute",
"top":(window.scrollMaxY-$(".footer").css("height").replace("px","")-50)+"px",
"left":"0px",
"width":"100%"
"height":"50px"
});

I experimented with wrapping the document in a div and calculating the heights to factor in the footer and shadow elements, but unfortunately, it did not work as expected.

javascriptjquerycss

Answer №1

Give this a shot:

let page = document.body;
let markup = document.documentElement;
let siteHeight = Math.max( page.scrollHeight, page.offsetHeight, 
                   markup.clientHeight, markup.scrollHeight, markup.offsetHeight );

Answer №2

The solution below worked like a charm:

$("div#gradientTop").css({
    "background":"url(\"gradientTop.png\")",
    "position":"absolute",
    "top":(Math.max(document.body.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight, document.documentElement.scrollHeight, document.documentElement.offsetHeight)-$(".header").css("height").replace("px","")-50)+"px",
    "left":"0px",
    "width":"100%",
    "height":"50px"
});

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