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Time: 18:42 - Sep 16, 2006     Asked by: jgivoni      Status: Answered      Points: 25   

How do I limit the number of characters in a textarea?

Which is the easiest way to limit the number of characters allowed to type in a textarea input field?

My textarea input field looks like this:

<textarea name="body" id="textareatest" style="width: 300px; height: 75px">Type text here. (limit 150 characters)</textarea>

Is there an html attribute that will do it, or do I use javascript?

Thanks,
Jakob

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There is no html attribute for that, you'll have to use javascript to do it.
You could have a function that would be called on each keypress and then deleting the character pressed if the maximum length was reached.

Expert:

dustPuppy

Date:

Sep 16, 2006

Time:

19:55

 

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Ok, thanks.

Something like this?:
<textarea onkeyup="if (this.value.length > 150) this.value = this.value.substring(0, 150)">

Jakob

Expert:

jgivoni

Date:

Sep 16, 2006

Time:

20:23

 

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yes, I believe that should work

Expert:

dustPuppy

Date:

Sep 16, 2006

Time:

20:29

 

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It works, though you can cheat it by copy/pasting some content to the field.
(Of course you'll have to use the right-click menu and NOT the CTRL + V shortcut...)

Add the onchange attribute with the same functionality to avoid this exploit.

Expert:

jgivoni

Date:

Sep 16, 2006

Time:

20:33

 

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Question Answered

This question has been answered, and points have been rewarded to the following experts:

dustPuppy: 10
jgivoni: 15

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