FormFunction

FormFunction[formspec,func] represents an active form that, when submitted, applies func to the values obtained from the form specified by formspec.

FormFunction[{name1->type1,…},func] represents an active form with fields named namei interpreted as types typei.

FormFunction[{{name1,label1}->type1,…},func] uses labeli as the label for the field named namei.

FormFunction[{namespec1->type1->default1,…},func] uses defaulti as the default for the field specified by namespeci.

FormFunction[formspec,func,fmt] specifies that in the cloud, the result from applying func should be returned in format fmt.

FormFunction[{formspec1,formspec2,…},func,…] represents a multipage form, in which the successive formspeci can be functions that are applied to the values obtained so far.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.