Question

The textarea’s rows attribute does not match the number of lines in Firefox. For instance:

<textarea rows=4 cols=40>
1
2
3
4
this line is visible in FF
</textarea>

Example: http://jsfiddle.net/Z7zXs/6/

How can I fix this issue? The textarea should only display 4 lines (instead of 5) for rows=4.

Answer 1

Firefox always adds an extra line after the textfield. If you want it to have a constant height, use CSS, e.g.:

textarea {
    height: 5em;
}

http://jsfiddle.net/Z7zXs/7/

EDIT:
You can also use the @-moz-document url-prefix CSS extension to target only the Firefox browser. Example

@-moz-document url-prefix() {
    textarea {
        height: 5em;
    }
}