Archive for the ‘form validation’ Category

Basic jQuery Form Validation Example (2mins)

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This popular article was updated on 18th August, 2016 to correct some minor errors and reflect the current version of the library. This tutorial shows you how to set up a basic form validation with jQuery, demonstrated by a registration form. We’...

Regular Expressions in JavaScript

Even if Perl looks like spaghetti to you and you feel that no mere mortal is equipped to manage a Unix system, the fact that JavaScript includes support for Perl-style regular expressions is good news... trust us! Continue reading %Regular Expressions ...

Drupal 8 Entity Validation and Typed Data Demonstration

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In the previous article of this series we’ve started our dive into the Entity Validation and Typed Data APIs. We’ve seen how DataType plugins interact with data definitions and how various constraints can be added to the latter at multiple levels a...

A Closer Look at Angular’s ngMessages Module

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This article was peer reviewed by Marc Towler and Stephan Max. Thanks to all of SitePoint’s peer reviewers for making SitePoint content the best it can be! Because of its ability to help developers craft better user experiences when building forms, t...

How to Build a File Upload Form with Express and Dropzone.js

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This article was peer reviewed by Panayiotis Velisarakos, Taulant Spahiu and Nilson Jacques. Thanks to all of SitePoint’s peer reviewers for making SitePoint content the best it can be! Let’s face it, nobody likes forms. Developers don’t like bui...

Easy Form Validation in AngularJS with ngMessages

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Last fall, the ngMessages module was rolled out with the release of Angular 1.3. This added enhanced support for displaying messages to the user — typically error messages from form validation. Before the release of ngMessages, developers were forced...