TypeError: Argument 1 of Window.getComputedStyle is not an object

[multiformeingegno]

Here's what I get:

jQuery 2.1.1

[erfanimani]

Hmm interesting, I'm getting that as well, but only in IE and Firefox (not in Chrome).

The problem lies in this part:

          var test = $('<div/>').css({
              position: 'absolute',
              'font-size': '14.1px'
            }).appendTo(document.body).get(0),
            computedStyle = window.getComputedStyle( test, null );

It seems test always returns undefined, but Chrome doesn't throw an exception, whereas Firefox and IE do.

I think the issue is that @multiformeingegno and I are including the script in the head of our html, instead of before the body end tag. In our case body doesn't exist yet, and appendTo(document.body) returns undefined!

Let me just try to confirm this..

[erfanimani]

Ok yeah, that was the problem - moving the script to before the body end tag worked. Not sure if you'd classify that as a bug or not! :)

[ghost]

I can confirm this. The plugin is unusable on Firefox/Yosemite.

Here's the fix:

          var computedStyle="";
          try{
          var test = $('<div/>').css({
              position: 'absolute',
              'font-size': '14.1px'
            }).appendTo(document.body).get(0),
            computedStyle = window.getComputedStyle( test, null );
          }catch(e){
            //do nothing
          }
          return computedStyle ? computedStyle.getPropertyValue( 'font-size' ) === '14px' : true;

[zachleat]

The plugin needs to run either on DOMContentLoaded or onload. I’ll probably build this into the plugin eventually so that it handles it transparently.

[fezzik1620]

I can confirm seeing this on Chrome beta 41.0.2272.74. An associate of mine on the same network, loading the same internal page not using the beta release of Chrome is not seeing this behavior.

[ashinzekene]

Window.getComputedStyle does not work when you use document.querySelector. it works when u use getElementById

[muskanbardia1]

how to resolve this error in react?

[muskanbardia1]

Window.getComputedStyle: Argument 1 is not an object.