The property for which to retrieve the value.
The value for the specified property name.
The value for the specified property name.
The property for which to check for the existence of a value.
The property to remove from the data set.
Removes the property from the dataset object.
Removes the property from the dataset object. Used to update the dataset object when data-* attribute has been removed from the element.
DOMStringMap
https://developer.mozilla.org/en-US/docs/Web/API/DOMStringMap