regex to validate in javascript

Question

So I'm trying to validate an email address with the following rules: 1 to 64 characters (lowercase, uppercase, digits or .) plus @ plus another 1 to 64 characters (lowercase, uppercase, digits or .)

I tried with this

function validate(str) {
      const regex = /([a-zA-Z0-9\.]){1,64}$@([a-zA-Z0-9\.]){1,64}$/;
      return regex.test(str);
    }

but it's not working. Any idea why?

Try without that $ planted in the middle

musefan
– musefan

2017-01-06 10:27:49 +00:00
Commented Jan 6, 2017 at 10:27 — musefan
– musefan, Commented Jan 6, 2017 at 10:27
check this regex101.com/r/lFccVe/2

prasanth
– prasanth

2017-01-06 10:30:36 +00:00
Commented Jan 6, 2017 at 10:30 — prasanth
– prasanth, Commented Jan 6, 2017 at 10:30

Wiktor Stribiżew · Accepted Answer · 2017-01-06 10:28:32Z

2

You inserted the end of string anchor before the @ symbol and did not use the start of string anchor ^. Also, remove the redundant capturing groups.

Use

regex = /^[a-zA-Z0-9.]{1,64}@[a-zA-Z0-9.]{1,64}$/
         ^                 ^^

answered Jan 6, 2017 at 10:28

Wiktor Stribiżew

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2 Comments

D. Kovács Over a year ago

To this question wouldn't a link to emailregex.com be the appropriate answer? ;)

Wiktor Stribiżew Over a year ago

@D.Kovács: No, because the requirements are different.

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