[whatwg] alternatives/grouping in pattern attributes in Web Forms

mqmq87 at web.de mqmq87 at web.de
Fri Apr 14 10:51:57 PDT 2006

This text in section 2.6 doesn't seem to consider alternatives and grouping:

| Thus, using the ^ character anywhere other than at the start of the pattern,
| or the $ character anywhere other than at the end of the pattern, prevents
| the pattern from matching anything (unless the characters are escaped or
| part of a range).

This is wrong (and what means "range"? should this read "CharacterClass"?).
In pattern="[0-9]+$|^0[xX][0-9a-fA-F]+" they would be even required to prevent
matching "123xyz", "abc0x0" or similar values, unless the whole string is
enclosed in parentheses.

More intuitive would be an implicit enclosure of the attribute value between
"^(?:" and ")$" instead of plain ^ and $ to construct the actual regular


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