score:0
according to the docs:
value = floating-point number
a string representing a number.
and, if you go further, to the spec for floating point, you'll note you can't have any other characters.
to achieve the desired behaviour you can use the pattern
attribute and specify a regex, e.g.
<input pattern="\d+((\.|,)\d+)?" />
the regex:
\d+((\.|,)\d+)?
allows digits (\d), then an optional part:
either a dot or a comma (.|,) and more digits \d+.
Source: stackoverflow.com
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