An optional container for grouping together multiple form field widgets (e.g. TextField widgets).

Each individual form field should be wrapped in a FormField widget, with the Form widget as a common ancestor of all of those. Call methods on FormState to save, reset, or validate each FormField that is a descendant of this Form. To obtain the FormState, you may use Form.of with a context whose ancestor is the Form, or pass a GlobalKey to the Form constructor and call GlobalKey.currentState.



Form({Key key, @required Widget child, bool autovalidate: false, WillPopCallback onWillPop })
Creates a container for form fields. [...]


autovalidate bool
If true, form fields will validate and update their error text immediately after every change. Otherwise, you must call FormState.validate to validate.
child Widget
Root of the widget hierarchy that contains this form.
onWillPop WillPopCallback
Enables the form to veto attempts by the user to dismiss the ModalRoute that contains the form. [...]
hashCode int
The hash code for this object. [...]
read-only, inherited
key Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited


createState() FormState
Creates the mutable state for this widget at a given location in the tree. [...]
createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
debugFillDescription(List<String> description) → void
Add additional information to the given description for use by toString. [...]
@mustCallSuper, @protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
toString() String
Returns a string representation of this object.
toStringShort() String
A short, textual description of this widget.


operator ==(other) bool
The equality operator. [...]

Static Methods

of(BuildContext context) FormState
Returns the closest FormState which encloses the given context. [...]