javascript - regular expression to match one dot or three dot validator -


in field want allow 1 dot or 3 dot

for 3 dot regex working

/^[a-za-z]+[.]{3}$/

but try 1 , 3 both not work. try | (or) sign

/^([a-za-z]+[.]{1})|([a-za-z]+[.]{3})$/

thanks in advance

thanks again working want allow below options

means 1 0r 3 dot in word not 2,4,5 dot.

1) m.c.a 2) m.c.a... 3) m...ca.

below regex works above requirement

/^([a-za-z]+(\.|\.\.\.)([a-za-z]+)?)+$/

you simplify or statement 1 group, example

^[a-za-z]+(\.|\.\.\.)$

this match number of characters ending either . or ...


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