Confirmation form is useful in cases where we do some action that needs confirmation from the user. Drupal provides a function called confirm_form() that provides a confirmation form.
In order to add a new jQuery or multiple javaScript/CSS to the Drupal site, it is better to use hook_library rather than using drupal_add_css/drupal_add_js multiple times. It is helpful if we are using the javaScript/CSS in multiple pages.
In the cases of multi-stage form it is necessary to add a Back button to the forms to navigate to the previous forms. By limiting the validation errors for a submit button, we can skip the form validation for that submit button.
Organic Group Module in Drupal allows to create and manage different groups. While creating a content, we can add that content to a group. The og_group() function allows to add a content to a group.
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Multiple database access in a site can create overheads. There is a chance of this being adversely affecting the site performance if the size of the website is considerably large.
Consider a function that returns the details of a new product. And if we call this function in different regions of a page, the query will be executed for each function call. ie, multiple database requests are made for the same result.
Forms can be considered as an integral part of websites. Forms can be included to a Drupal website using Form API. Form API is so extendable that we can customize almost all of the form API elements. In this article I will be explaining 'how to increase the "coolness" of your form elements by adding "spinner" style.