How can I tell of a HTML attribute exists or not, using Javascript

Question

I'm trying to convert to HTML5, but to preserve the site experience for those that don't have all the HTML5 features, I would use a workaround. For example, how can I check if the HTML5 attribute contentEditable exists, so that if it doesn't, I can just create a textarea instead.

Thaks!

Lekensteyn · Accepted Answer · 2010-11-03 20:10:00Z

1

The following snippet checks if the 'contentEditable' property exists.

if('contentEditable' in element){
   // contentEditable is available
}
else{
   // create textarea
}

answered Nov 3, 2010 at 20:10

Lekensteyn

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3 Comments

Chiggins Over a year ago

pastebin.com/aZauL5K7 I have that code, but in IE6, it doesn't display any messages

Chiggins Over a year ago

Yes, positive. var edit_region = document.getElementById('edit_region'); where <div id="edit_region"></div>

Lekensteyn Over a year ago

You said, it doesn't display any messages. Not even an error message? Where did you test for it's existence?

Bill the Lizard · Accepted Answer · 2011-10-05 18:33:56Z

1

This can help: http://diveintohtml5.ep.io/detect.html

edited Oct 5, 2011 at 18:33

Bill the Lizard

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answered Nov 3, 2010 at 20:09

Davis Peixoto

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1 Comment

Bill the Lizard Over a year ago

While this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference.

Bill the Lizard · Accepted Answer · 2011-10-05 18:34:40Z

0

According to HTML5 Peeks, Pokes and Pointers:

"isContentEditable" in document.createElement("a")

You can replace the document.createElement("a") with any element, really, so if you already have an element you're working with, use that.

edited Oct 5, 2011 at 18:34

Bill the Lizard

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answered Nov 3, 2010 at 20:11

Brian Campbell

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