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In this video tutorial, we will be implementing form States to conditionally show form fields using a boolean field. We will use an already created module and implement hook form alter to implement the states logic. We have a Drupal instance installed with a content type called article and a body field. We will create a boolean field called "width body" that will be hidden by default and shown when checked. Our goal is to have the body field shown or hidden based on the boolean field. When creating a new article, we will see the "width body" field next to the body field for easy access.
