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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: grid template rows
Date: Mon, 19 Aug 2019 15:19:24 +0200
Organization: PointedEars Software (PES)
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Andrew Poulos wrote:

> With this HTML
> 
> <div id="container" style="grid-template-rows: 63px 42px 1fr 32px;">
> 
> console.log(container.style.gridTemplateRows);
> 
> gives "64px 32px 1fr 32px;"

Probably not.  The delimiting semicolon is not supposed to be part of the 
property value.
 
> But with this
> 
> #container {
>    grid-template-rows: 64px 32px 1fr 32px;
> }
> 
> <div id="container">
> 
> let con = document.getElementById('container');
> console.log( window.getComputedStyle(con,
> null).getPropertyValue("grid-template-rows") );
> 
> gives "64px 32px 497px 32px;"

Probably not.  Same reason as above.
 
> That is, the third value is a pixel value instead of 1fr.

I cannot reproduce that in navigator.userAgent === "Mozilla/5.0 (X11; Linux 
x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.75 
Safari/537.36".
 
> How can I get the actual value as set in the CSS and not the pixel values?

The only other way I know that might work in your case is to read the 
stylesheet directly.
 
> I need to manipulate the value for grid-template-rows and the moment I
> get the value, any fr unit is lost and the layout breaks.

You can store the current “fr” value elsewhere.

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