CapitalizeFirstLetterFormatter class

A text input formatter that capitalizes the first letter of the input.

Automatically converts the first character of the text field input to uppercase while leaving the rest of the text unchanged. Useful for names, titles, and sentences that should start with a capital letter.

The formatter is applied in real-time as the user types, ensuring the first character is always capitalized without modifying subsequent characters.

Example:

TextField(
  inputFormatters: [
    CapitalizeFirstLetterFormatter(),
  ],
  decoration: InputDecoration(
    hintText: 'Enter your name',
  ),
)
// User types: "john" → Displays: "John"
// User types: "mary smith" → Displays: "Mary smith"

Note: This only capitalizes the very first character. If you need to capitalize the first letter of each word, use a different formatter.

See also:

• TextInputFormatter for creating custom input formatters

Inheritance

• Object
• TextInputFormatter
• CapitalizeFirstLetterFormatter

Constructors

CapitalizeFirstLetterFormatter()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

formatEditUpdate(TextEditingValue oldValue, TextEditingValue newValue) → TextEditingValue

Formats the text edit update by capitalizing the first character.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited