Credit card forms are among these components, which every internet business might need to implement at the same point or another, and they can frequently be a pain point for both programmers and consumers.

That is having said; it is vital that all these forms are made to be intuitive and user-friendly since they would be the entry point for paying users might be a shame when a business lost a possible client to some badly-designed payment type, even when they did everything else perfect.

The objective of this article is to describe how to execute your super-awesome credit card type, full of bug-free identification, and formatting. If you are just here for your code, feel free to scroll to the very bottom to look at the last implementation.

How many elements should have a credit card form?

A credit card form needs to be easy, brief, and straightforward. Here are the four input field each credit card form must possess:

Charge card owner title
Card number
Secret code (also Called CVV/CVC/CID)
Expiration Date

Besides that our form is going to have a heading, a submit button, and images to get popular credit card vendors.

How to validate a credit card with JavaScript?

Here’s an example of a Visa credit card validation.

<form name="form1" action="#">
<ul>
<li><input type='text' name='text1'/></li>
<li>&nbsp;</li>
<li class="submit"><input type="submit" name="submit" value="Submit" onclick="cardnumber(document.form1.text1)"/></li>
<li>&nbsp;</li>
</ul>
</form>

function cardnumber(inputtxt)
{
var cardno = /^(?:4[0-9]{12}(?:[0-9]{3})?)$/;
if(inputtxt.value.match(cardno))
{
return true;
}
else
{
alert("Not a valid Visa credit card number!");
return false;
}
}

You can apply this code sample for the validation of other types of cards: American Express, MasterCard, or any card you want to validate.

The code always depends on your validation needs. This small example can serve as a start to use credit card validation in JavaScript in the right way.