HTML attributes: overview of the most common tools

In addition to the HTML attributes mentioned above, there are own attributes that can only be evaluated via script or used with CSS. It is thus possible to provide information that is not intended to be presented visually. These HTML attributes always start with data-. You can set them with setAttribute and read them with getAttribute. Search engines also do not evaluate these HTML attributes. Only lowercase letters, numbers, dash, period, and colon are allowed for data attributes.