Salesforce JavaScript Developer Practice Exam

The 'data-*' attribute in HTML is specifically designed to store custom data that is private to the page or application. This allows developers to embed additional data attributes within HTML elements without violating standard HTML rules.

These attributes can be accessed using JavaScript to enhance interactivity and functionality on the page. For example, if you have a list of items and you want to store specific data related to each item, you can use the 'data-*' attributes to keep that data associated with the respective HTML elements. This method promotes a cleaner and more maintainable code structure, as it separates the concerns of data storage and presentation.

By using these custom data attributes, developers can create dynamic web applications that can respond to user interactions by retrieving data stored in the element itself, thereby enhancing the overall user experience.