dataattributes

dataattributes are a feature of HTML5 that allows developers to store custom data private to the page or application. This custom data is stored in attributes prefixed with data. For example, data-user-id="123" would be a valid data attribute.

The purpose of dataattributes is to allow the embedding of additional information into any HTML element without resorting to non-standard, proprietary extensions to markup. These attributes are accessible via JavaScript and can be used to customize the behavior of the page or application. They are particularly useful for storing data that is not directly visible to the user but is needed for the functionality of the page.

When you access dataattributes in JavaScript, they are available through the dataset property of the DOM element. For instance, if you have an element with data-user-id="123", you can access this value using element.dataset.userId. The hyphenated attribute name is converted to camelCase in JavaScript.

Dataattributes should not be used for any presentation-related information, as this is the role of CSS. They are intended for storing data that is used by the application's logic. While search engines can read dataattributes, they are not typically used for SEO purposes. Using dataattributes is a clean and semantic way to attach custom data to HTML elements, making code more organized and maintainable.