Regular expression for password validation?

Question

I need regex for a password that has:

I need it for HTML pattern attribute.

I tried this:

"^[a-zA-Z0-9]*$"

but it accepts only a, for example. also this:

"[A-Za-z0-9]"

accepts one character

Try doing 3 different regex's, one for each instance: number, uppercase letter, lowercase letter — ganders, Mar 14 '17 at 16:01
This has been asked many times on SO. Just use the search function! — Fallenhero, Mar 14 '17 at 16:06
You can see same question and answer from [this link](http://stackoverflow.com/questions/19605150/regex-for-password-must-be-contain-at-least-8-characters-least-1-number-and-bot?answertab=oldest#tab-top) — Hakan Altınbaş, Mar 14 '17 at 16:09
There is even an example on w3schools on the page for validations using the pattern attribute. `(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,}`, change `{8,}` to `+` if you don't care about length - https://www.w3schools.com/tags/att_input_pattern.asp — rvalvik, Mar 14 '17 at 16:11

Sahil Gulati · Accepted Answer · 2017-03-14T16:56:11.497

1

Regex: /^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])[a-zA-Z0-9]+$/gm

Regex: /^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])[a-zA-Z0-9]{10}$/gm

edited Mar 14 '17 at 16:56

answered Mar 14 '17 at 16:22

Sahil Gulati

And where can I specify the length for the whole password, please? – mshwf Mar 14 '17 at 16:45
Adding a new regex in which you can specify length as well. – Sahil Gulati Mar 14 '17 at 16:51
Added new expression in which you can specify any length you want. In the above example i have used length `10`. You can change it according to your requirement. – Sahil Gulati Mar 14 '17 at 16:57

1 Answers1