I have an HTML tag with input type: number. I would like to set a pattern that allows only specific format input: 3 digits and 1 decimal value, for example:
123.1 -> is valid
123.12 -> not valid
123 -> not valid
Only the first format is valid, everything else is not valid. Also the dot '.' should be interchangeable with the coma ','.
123,1 -> is also valid
CodePudding user response：
You could use
^\d{3}[\.,]\d$
| Regex | explanation |
|---|---|
^ |
start of string |
\d{3} |
exactly 3 digits |
[\.,] |
either a decimal point or comma |
\d |
a single digit |
$ |
end of the string |
CodePudding user response：
You can use this regex:
/^\d{3}[,\.]{1}\d/g
CodePudding user response：
I think this could suit you. Basically, I make sure that there is nothing before the first 3 digits. Then, I check that the number is followed by either a dot or a comma plus a single digit with nothing else after it.
^\d{3}(\.\d$|,\d$)