Attempting to adjust the style.color of a <label> element with JavaScript results in an error

Why does this code work in Firefox but not in IE9?

// turn on the 'image file upload' field and its label
document.getElementById('itemImageId').disabled = false;
document.getElementById('labelForImageUploadID').style.color = "black";

Here is the HTML with the label and the file input:

<label for="itemImageId" style="color: silver" id="labelForImageUploadID">Item image
(select to change the item's current image)</label>
<input type="file" size="100px" id="itemImageId" disabled="disabled"
name="theFileUpload"></input>

** EDIT ** The above label and file upload tags are nested inside the following div -- I added this so you can see how the mouse click is handled. The handleRowClick() function has the above Javascript code that tries to turn the text black:

<div class="itemlistRowContainer" id="topmostDiv_ID" onclick="handleRowClick(this);"
onmouseover="handleMouseOver(this);" onmouseout="handleMouseOut(this);"
ondblclick="handleDblClick(this);">

When the label first appears on the page, its color is correct -- it is silver due to the inline color style.

The Javascript code executes on a mouse click.

In Firefox, the code turns the label text to black, and enables the file upload control.

However in IE9 the label's text stays gray.

Does IE9 not support style.color = "somecolor" to dynamically control colors of the label tag?

I've looked at a few other posts, and the only quirk I found was that if you have enabling/disabling happening dynamically, to make sure the tag is ENABLED in IE9 before you try to change its color.

It's not just this one label tag either -- all the label tags on the page fail to turn black but ONLY in IE9 -- in FF everything works.

Is there a 'gotcha' or a trick I'm missing?

Answer №1

After troubleshooting, I managed to resolve the issue.

The problem initially arose when my label tags were not refreshing in Internet Explorer after changing their text color from silver to black. The code snippet below failed specifically in IE:

// turn on the 'image file upload' label
document.getElementById('labelForImageUploadID').style.color = "black";

SYMPTOMS AND CLUES

Although the above code successfully changed the text color of the label in IE, a manual trigger was needed to reflect this change. This included resizing the browser window or double-clicking within it.

It became evident that the issue lied in IE's reluctance to refresh the label tag post-color alteration.

Several attempts were made to rectify the problem, such as setting 'hasLayout' to true and assigning fixed pixel widths to the elements but proved futile.

HERE IS THE SOLUTION

// THIS DID NOT WORK IN IE BUT WAS FINE IN Firefox:
// document.getElementById('labelForImageUploadID').style.color = "black";

// THIS WORKS IN IE and IN FIREFOX
var imageUploadLabel = document.getElementById('labelForImageUploadID');
imageUploadLabel.style.color = "black";
imageUploadLabel.style.display = "none";
imageUploadLabel.style.display = "inline-block"

Despite finding a functional workaround, I acknowledge the hacky nature of the solution and remain open to more elegant alternatives.

I am also considering if the DOCTYPE specified in my pages is contributing to this issue. Feedback on this matter is welcome.

Answer №2

Everything is working perfectly:

Check it out here

Just a heads up, make sure to consider different browsers like IE that use attachEvent instead of addEventListener().

object.attachEvent(event, callback)

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