If you scroll to the end of this article you'll see this list of names:

• Wowana
• Oomvy
• Exza
• Gozer
• Hentra
• Molisa
• Gizic
• Yaberi
• Anea
• Dymi
• Gibbal

Each of these list items contain an image and the link. The image associated with each li is hidden with CSS. I have been trying to setup some jQuery to so that the image shows when the link is rolled over.

Here is the code:

<li><img class="previewImage" src=".png" width="200" height="151" /><a href="names/gibbal">Gibbal</a></li>

And the simple jQuery I apply in the console to test:

$('.previewImage').show();

And the error:

TypeError: Cannot read property 'show' of null

What am I overlooking? This is driving me crazy and imagine it's something very simple.

If you scroll to the end of this article you'll see this list of names:

• Wowana
• Oomvy
• Exza
• Gozer
• Hentra
• Molisa
• Gizic
• Yaberi
• Anea
• Dymi
• Gibbal

Each of these list items contain an image and the link. The image associated with each li is hidden with CSS. I have been trying to setup some jQuery to so that the image shows when the link is rolled over.

Here is the code:

<li><img class="previewImage" src="http://www.brandroot./images/brands/gibbal.png" width="200" height="151" /><a href="names/gibbal">Gibbal</a></li>

And the simple jQuery I apply in the console to test:

$('.previewImage').show();

And the error:

TypeError: Cannot read property 'show' of null

What am I overlooking? This is driving me crazy and imagine it's something very simple.

• javascript
• jquery

Share Improve this question Follow asked Jun 13, 2014 at 0:52 Michael RaderMichael Rader 5,96788 gold badges3737 silver badges4444 bronze badges 1

• You have multiple libraries loaded. $ is not jQuery, it's some other library (mooTools, maybe?). – Barmar Commented Jun 13, 2014 at 0:56

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1 Answer 1

Sorted by: Reset to default 4

For some reason, doing

jQuery('.previewImage')

worked, whereas

$('.previewImage')

is null. This might be caused by another library using the $ shortcut (prototype perhaps?). Long story short: use the first Syntax instead of $