Regular expression for ussd code in JavaScript

Question

My text box should only allow valid ussd code

Starts with *

Ends with #

And in the middle only * , # and 0-9 should be allow.

alert(/^([^0-9#*]$/.test(ussd)); trying with this expression but not working.@Rajesh — Sadashiv, Feb 23 '17 at 12:43
I would be inclined to say **"it doesn't exist"** because USSD codes are *unstructured*. Some don't end with a #, some don't start with a *, for example. — Luke Briggs, Feb 23 '17 at 12:48
(By convention, USSD uses MMI codes, but there's nothing that explicitly defines their alphabet or their format. It's like a telnet session.) — Luke Briggs, Feb 23 '17 at 13:09

score 0 · Answer 1 · answered Feb 23 '17 at 12:53

0

You can use the following Regex:

^\*[0-9]+([0-9*#])*#$

The above regex checks for the following:

String that begins with a *.
Followed by at least one instance of digits and optionally * or #.
Ends with a #.

In Java script, you can use this to quickly test it out:

javascript:alert(/^\*[0-9]+([0-9*#])*#$/.test('*06*#'));

Hope this helps!

answered Feb 23 '17 at 12:53

anacron

6,093
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Extra note: Whilst this matches the OPs description of a USSD, it fails for a broad variety of them (e.g. `##004**16#` is a valid USSD). – Luke Briggs Feb 23 '17 at 12:58

score 0 · Answer 2 · answered Feb 23 '17 at 12:54

0

This should work /^\*[0-9\*#]*[0-9]+[0-9\*#]*#$/

ussd = "*123#";
console.log((/^\*[0-9\*#]*[0-9]+[0-9\*#]*#$/).test(ussd));

ussd = "123#";
console.log((/^\*[0-9\*#]*[0-9]+[0-9\*#]*#$/).test(ussd));

answered Feb 23 '17 at 12:54

vatz88

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Sagar V · Answer 3 · 2017-02-23T12:59:16.517

0

Check here it will work for you

Starts with *
Ends with #
can contain *,#, digits
Atleast one number

function validate(elm){
  val = elm.value;
  if(/^\*[\*\#]*\d+[\*\#]*\#$/.test(val)){
    void(0);
  }
  else{
    alert("Enter Valid value");
  }
}

<input type="text" onblur="validate(this);" />

edited Feb 23 '17 at 12:59

answered Feb 23 '17 at 12:54

Sagar V

11,606
7
43
64

score 0 · Accepted Answer · answered Feb 23 '17 at 12:54

You can try following regex:

/^\*[0-9\*#]*[0-9]+[0-9\*#]*#$/

Rules

Starts with *
Can have 0-9, *, #
Must have at least 1 number
Ends with #

function validateUSSD(str){
  var regex = /^\*[0-9\*#]*[0-9]+[0-9\*#]*#$/;
  var valid= regex.test(str);
  console.log(str, valid)
  return valid;
}

function handleClick(){
  var val = document.getElementById("ussdNo").value;
  validateUSSD(val)
}

function samlpeTests(){
  validateUSSD("*12344#");
  validateUSSD("*#");
  validateUSSD("****#");
  validateUSSD("12344#");
  validateUSSD("*12344");
  validateUSSD("****5###");
}

samlpeTests();

<input type="text" id="ussdNo" />
<button onclick="handleClick()">Validate USSD</button>

Regular expression for ussd code in JavaScript

4 Answers4

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