The dataset API attaches and accesses custom data on elements, using either the dataset property of HTMLElement or attributes prefixed with data-.

Learning resources on MDN

• HTMLElement: dataset property

Browser support (view on caniuse.com)

• Chrome 7 Released on 2010-10-19
• Chrome Android 18 Released on 2012-06-27
• Edge 12 Released on 2015-07-29
• Firefox 6 Released on 2011-08-16
• Firefox for Android 6 Released on 2011-08-16
• Safari 5.1 Released on 2011-07-20
• Safari on iOS 5 Released on 2011-10-12

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