Instantiates a new handler.
The DOM element to contain the handler
The step to handle
The deferred Promise that resolves the step when it's ready to submit.
The step to handle
The DOM element to contain the handler
Initializes the handler and returns a Promise that will resolve with the complete step when it's ready to submit.
Helper for locating a DOM element within the target.
Capture references to handler-specific DOM elements.
Perform any required action after the handler's template has been rendered.
Render the handler's template to the target.
Handler that renders the three different uses of a choice collector in Express: