Regex for email localpart

Asked Jun 23 '20 at 22:15

Active Jun 23 '20 at 22:44

Viewed 37 times

I am using html pattern for email localpart for validation before @

Using the below regex

^[a-zA-Z0-9_!#$%&'*+/=?`{|}~^-]+(?:\.[a-zA-Z0-9_!#$%&'*+/=?`{|}~^-]+)*$

Now i know that local part should be 64 characters. Kindly help where to put the length so that combine length of this local part should be less than 64 characters

edited Jun 23 '20 at 22:44

Wiktor Stribiżew

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asked Jun 23 '20 at 22:15

IOT Account

Use match and string .length – user120242 Jun 23 '20 at 22:21
Can you give me example – IOT Account Jun 23 '20 at 22:26
```"abcabc".match(/^[a-zA-Z0-9_!#$%&'*+/=?`{|}~^-]+(?:\.[a-zA-Z0-9_!#$%&'*+/=?`{|}~^-]+)*$/)[0].length < 64``` – user120242 Jun 23 '20 at 22:28
After the first `^`, add `(?=[^@]{1,64}@)` – Wiktor Stribiżew Jun 23 '20 at 22:46
@WiktorStribiżew I don't want to check domain only before domain as i am selecting domain from dropdown – IOT Account Jun 23 '20 at 23:23
@WiktorStribiżew Your answer needs little bit change and the below works for me ^(?=[^@]{1,64}$) – IOT Account Jun 23 '20 at 23:24

Regex for email localpart

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