According to html5.org, the \"number\" input type\'s \"value attribute, if specified and not empty, must have a value that is a valid floating point number.\"
Yet it
Based on this answer
Meaning :
Char code :
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Backspace
dot
&& is AND , || is OR operator.
&&
AND
||
OR
if you try float with comma :
Supported Chromium and Firefox (Linux X64)(other browsers I does not exist.)