Regular Expression for Email validation
if you want to put this for optional field then we have to allow null/empty values as well
So the above expression becomes
^ begin of the string
$ is end of String
| is OR
Regular Expression for Alphanumeric character and also '_' (UnderScore) is allowed
[a-z A-Z 0-9 _]
Regular Expression for Number validation(Only Numbers are allowed not Decimals like 1.5)
[0-9]{1,10}|null
| -> OR
null -> the input text allows null values as well
Attribute validation
We can perform attribute validation using <af:validateRegExp> component
For Ex, If input text is allowed to have only alphanumeric then put following <af:validateRegExp> within af:inputText component
<af:validateRegExp messageDetailNoMatch="Only alphanumeric, '_'(Underscore) and '-'(Hyphen) characters are allowed" pattern="[a-z A-Z 0-9]*"/>
