attribute
Purpose
It defines a attribute of the enclosing element. The content of the element is the attribute value, while the name attribute specifies the attribute name.Examples
<z:button label="Hi">
<z:attribute name="onClick">alert("Hi")</z:attribute>
</z:button> It is equivalent to
<z:button label="Hi" onClick="alert('Hi')"/>Description
It is useful if the value of an attribute is sophisticated.