Disclosed are various embodiments for the mapping of behavior to data. Multiple behavior elements from a code library that are compatible with one or more data elements of a document are automatically determined according to a data contract associated with each one of the behavior elements. Each of the behavior elements is configured to consume one or more data elements and produce a network page feature according to a behavior. One or more of the behavior elements are selected automatically according to a plurality of rules, thereby producing one or more selected behavior elements. A mapping of the one or more selected behavior elements to the one or more data elements is automatically generated.