Method for setting attributes. Sets the attribute value for all elements in
the matched set. If you set an attribute's value to null, you remove that
attribute. You may also pass a map and function.
The instance itself.
Method for setting multiple attributes at once. Sets the attribute value for
all elements in the matched set. If you set an attribute's value to null,
you remove that attribute.
The instance itself.
Method for getting attributes. Gets the attribute value for only the first element in the matched set.