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Editorial Team
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Asked: 2026-05-18T06:36:40+00:00

I’m trying to run the following code on a website to set up the

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I’m trying to run the following code on a website to set up the height of elements in a webpage:

document.querySelector("#body").style.height = window.innerHeight - document.querySelector("#footer").offsetHeight;

It’s part of a function, and all the other parts of the function appear to be working properly, but this section does not work.

A similar command however, written with jQuery, does work:

$("#body").css({ "height" : window.innerHeight - document.querySelector("#footer").offsetHeight });

But I’d rather not have to call on the jQuery library for something as small as this.

Any suggestions as for what I’m doing wrong?

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1 Answer

  1. Editorial Team

    try to append ‘px’ at the end of the computed value.

    (window.innerHeight - document.querySelector("#footer").offsetHeight) + 'px'
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