The parameterEditorFactory of the HTML5 Report Viewer

Parameter	Type	Description
match(parameter)	boolean	determines whether the editor is suitable for the passed parameter parameter
createEditor(placeholder, options)	parameterEditor	adds the root html element for the editor, holds the logic for calling the paramerChanged callback. Returns a parameterEditor object placeholder, this is the HTML element which the parameter editor UI is appended to options : parameterChanged : function(parameter, value), a callback function which should be called when the parameter’s value has been changed parameter, the instance of the currently edited parameter value, the new parameter value

A sample implementation may be seen in the article How to Create a Custom Parameter Editor.