avoid-missing-controller

v1.15.0

warning

recommended

pro+

Warns when a TextFormField, TextField or EditableText does not have at least one way to get the updated value.

Not providing a controller or not getting an updated value in a callback leads to the widget state not being updated when the user updates the field.

Example

❌ Bad:

// LINT: Changes to this field's value are not saved to your widget's state.
//  Try providing a controller or listening to the value change events.
TextFormField();

✅ Good:

TextFormField(controller: TextEditingController());
TextFormField(onChanged: (_) {});