Firefox 4 does not validate REGEX in "pattern" attribute of INPUT (type = text) when diacritic characters are includes (Chrome does).

Question

Using HTML5 and Firefox 4.0.1, following code :
<form>
<input type="text" name="my_input"
pattern="^[A-Z]([a-zA-Zçéèâêîôûäëïöü-]{1,47}|.)" />
</form>
fails to validate input like "François" or "André" but "Francois" ou "André" is accepted. The problèm occurs with string including any diacritic character.
(The REGEX validates using "Expresso" Regular Expression Editor.)

Answer 1

See https://developer.mozilla.org/en/HTML/element/input
<blockquote>pattern HTML5:
A regular expression that the control's value is checked against. The pattern must match the <u>entire</u> value, not just some subset. Use the title attribute to describe the pattern to help the user. This attribute applies when the value of the type attribute is text, search, tel, url or email; otherwise it is ignored.</blockquote>
<pre><nowiki>pattern="^[A-Z]([a-zA-Zçéèâêîôûäëïöü-]{1,47}|.)$"</nowiki></pre>