TextField

A TextField is a user interface control that accepts a single line of text input from the user. It is commonly used in forms, search fields, and dialog boxes. In some frameworks, the term is broadened to include simple one-line inputs that may be replaced by other controls for more complex input.

A text field typically exposes properties such as the current value, placeholder text, maximum length, and states like read-only or disabled. It may support input masking, validation patterns, and alignment options. Password fields are similar but obscure the entered characters.

Text fields generate events during interaction, including input or change events as the value changes, and focus or blur events when the field gains or loses focus. Pressing Enter often submits a form or triggers a default action.

Accessibility considerations include associated labels, providing an accessible name, and using ARIA attributes to indicate required status or validation errors. Proper contrast and keyboard navigability are important.

Common implementations include HTML input type="text" in web development; JTextField in Java Swing; EditText in Android; UITextField in iOS; TextField in Flutter; and QLineEdit in Qt. Across platforms the control serves the same purpose: a compact field for short text input. See also input controls, form controls, and accessibility practices.