DatasetThe dataset API attaches and accesses custom data on elements, using either the dataset property of HTMLElement or attributes prefixed with data-.widely2015-07-292018-01-29https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributesdatasethttps://developer.mozilla.org/docs/Web/API/DOMStringMapapi.DOMStringMapapi.HTMLElement.datasetapi.MathMLElement.datasetapi.SVGElement.datasethttps://nowyoucanuse.com/features--dataset.html