We can get the regex as per our need from the google or AI. we can assign the condition and functionality according to our need. For example
Syntax:
let creditCard = paymentRec.getValue({
fieldId: ‘custrecord_jj_credit_card’
});
let regex = /^[0-9]{13,20}$/;
if (!regex.test(creditCard)) {
alert(‘Credit card numbers must contain between 13 and 20 digits.’);
if (creditCard.length < 13) {
alert(‘Credit card number must contain between 13 and 20 digits.’);
} else if (creditCard.length > 20) {
alert(‘Credit card number is not valid. Please check that all digits were entered correctly.’);
}
}