Learn how to use JavaScript to check and manipulate HTML form elements, and how to provide feedback to the user based on the validation results.

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Of all the hats JavaScript can wear, its form-processing features are among the most sought and used. Learn how to use JavaScript for form processing, validation, and more.

Learn how to use regular expressions, or regex, for form validation in web applications. Discover the benefits, challenges, and resources of using regex.

You can create a release to package software, along with release notes and links to binary files, for other people to use. Learn more about releases in our docs ...