Is there a way to join this 3 separated regex in one?

Question

This checks if one or more numbers are present in the string, if one ore more letters are in the string, and if the length is higher than 5.

is there a way to join them in a single regex?

var aliascheck = $('#alias').val();

if (!/\d/.test(aliascheck) || !/[a-z]+/.test(aliascheck) || (aliascheck.length < 5)){ 
    alert('you need to enter at least a letter, a number...);
}

[`^(?=[^\d\r\n]*\d)(?=[^a-zA-Z\r\n]*[a-zA-Z])(?=.{5}).*$`](https://regex101.com/r/oUI2HY/1) — Gurmanjot Singh, Apr 18 '19 at 04:51

score 1 · Accepted Answer · answered Apr 18 '19 at 05:01

You can use this

^(?=.*\d)(?=.*[a-z])(?=.{5,}).*$

^ - Start of string
(?=.*\d) - condition for atleast one digit
(?=.*\[a-z]) - condition for atleast one letter
(?=.{5,}) - condition for length 5 or greater
.* - Match anything except new line
$ - End of string

let testFunc = (str) => /^(?=.*\d)(?=.*[a-z])(?=.{5,}).*$/i.test(str)

console.log(testFunc('12345'))
console.log(testFunc('1'))
console.log(testFunc('1Abcf'))

score 0 · Answer 2 · answered Apr 18 '19 at 05:00

0

You can try this

 /(?=[^\d])|(?=[^a-z]+)|(?=.{5})/g.test()

answered Apr 18 '19 at 05:00

Shubham Shendage

124
4

score 0 · Answer 3 · answered Apr 18 '19 at 05:11

I will use next regular expression that uses positive lookaheads:

/^(?=.*[a-zA-Z])(?=.*[0-9])(?=.{5,})/

Example:

$("#testBtn").click(function()
{
    var aliascheck = $('#alias').val();

    if (!/^(?=.*[a-zA-Z])(?=.*[0-9])(?=.{5,})/.test(aliascheck))
    { 
        console.log("Test failed");
    }
    else
    {
        console.log("Test success");
    }    
});

.as-console {background-color:black !important; color:lime;}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input id="alias" type="text" placeholder="Insert Alias">
<button id="testBtn">Test</button>

Is there a way to join this 3 separated regex in one?

3 Answers3