BehaviorAnatomy

Anatomy of a Behavior

NinjaScript applies “behaviors” to elements selected using jQuery’s CSS-like
selectors. A behavior consists of three things:

1. A transformer: a function called “transform” that take the element as its
   argument, and changes it in ways that are appropriate to the behavior. One
   prepackaged behavior “make_ajax_link” takes a form consisting of a single
   submit button and converts it into an anchor tag with appropriate attributes.
2. A list of event handlers – functions in two arguments that take action based
   on the event and the element. By default, NinjaScript event handlers swallow
   the event, preventing the default behavior and preventing the event from
   bubbling back up the DOM. You can use an array of [handler_function, *strings]
   to have NinjaScript allow “default” behavior, allow the event to “propagate”,
   or allow the “immediate” propagation of the event (to other handlers on the
   same element).
3. A list of helper methods, which are available to the event handlers.