How to Integrate ZIP Code Validation JS Into Your Forms

 

zip code validation js

ZIP code validation is the process of verifying that a user-entered zip code matches their geographic location within the United States. It’s important to have this functionality on your website or app because it can help prevent fraud and ensure that products or mail are delivered to the correct address.

A naive regular expression that checks whether a string contains a valid US ZIP code is listed below. It works for both 5 digit and 9 digit (ZIP+4) formats. It can be easily embedded in your form validation scripts.

However, it is worth mentioning that this regular expression only works for US ZIP codes and not for any other countries' postal codes. You would need to create a different regular expression for each country you support or use a more advanced ZIP code extraction method (like the one we have here).

The first version of the US ZIP code system was created by Robert Moon in 1963. It was implemented as a way to streamline postal delivery by introducing a more structured system of five digits that pinpointed addresses down to a few block radius.

Incorrect postal addresses can result in product returns, shipping delays, and increased postage costs. Using a real-time zip code verification tool like Experian can help reduce these issues and improve your direct mail delivery rates.

This Digioh app will validate that a form field is populated with a valid 5-digit US ZIP code and will display an error message to the user if it is not. To use this plugin, simply install it from your profile menu top right, “Custom JS (Apps)”.


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