How to accept minimum length and maximum length of a string from the user

[Pratiksha Lang1]

How to accept minimum length and maximum length of a string from the user

I have written a OnChange Catalog client script for the same. This script works fine if I want to accept length 10, In this I also want to accept it if length is 4. I want it to accept both length 10 and 4, if it is not 10 or 4 then it should throw an error.

function onChange(control, oldValue, newValue, isLoading) {
if (isLoading || newValue == '') {
return;
}var letterNumber = /^[0-9a-zA-Z]+$/;

if(!(newValue.match(letterNumber)) || newValue.toString().length>10 || newValue.toString().length<10)
{
alert('It accepts only 10 digits or character');
g_form.setValue('vehicle_registration_no', '');

}

[Sai Kumar B]

@Pratiksha Lang1 

Try the following code

function onChange(control, oldValue, newValue, isLoading) {
if (isLoading || newValue == '') {
return;
}

var letterNumber = /^[0-9a-zA-Z]+$/;


if( !(newValue.match(letterNumber)) && ( newValue.toString().length !=10 || newValue.toString().length != 4) ) //An alert is displayed if any of the following conditions fail: first, check the regex; second, either value must be in maximum or minimum length.
{
alert('It accepts only 10 digits or characters);
g_form.clearValue('vehicle_registration_no');
}

[Pratiksha Lang1]

This is not working, it is accepting any length 

[Sai Kumar B]

@Pratiksha Lang1 

Try this using regex

var regexcheck=/^[A-Za-z0-9]*$/.test(newValue);
var minLengthCheck = /^[a-zA-Z]{4}$/.test(newValue); //Regex to check minimum length
var mxLengthCheck = /^[a-zA-Z]{10}$/.test(newValue); //Regex to check maximum length

if(regexcheck && (minLengthCheck  || mxLengthCheck )){
//do nothing
}else{
alert("error msg");
g_form.clearValue('vehicle_registration_no');
}

[Sohail Khilji]

Hi Pratiksha,

See if this helps,

if(g_form.getValue('field_name').length==4 || g_form.getValue('field_name').length==10){
g_form.addInfoMessage('valid value');
} else {
g_form.addInfoMessage('invalid value');
}

Thanks,

SK