tekstikenttä

Tekstikenttä is a graphical user interface control that enables the user to enter and edit a single line of text. It is commonly used for short inputs such as names, search queries, passwords, and other form fields. In web contexts it is typically implemented as an input element designated for text, though there are variants for different semantics or for masking input.

In use, a tekstikenttä presents a bordered area that can receive keyboard input, place and move a caret, and support features such as selection, copy-paste, and editing. It often includes placeholder text to hint the expected content, a value that can be submitted with a form, and optional attributes that constrain input or improve usability. Common attributes include maxlength, required, pattern, placeholder, autocomplete, spellcheck, autofocus, readOnly, and disabled. For accessibility, a label is associated with the control, and assistive technologies may use aria-label or aria-describedby to convey purpose or instructions.

Variants of the tekstikenttä include password fields that mask input, and specialized fields such as email, tel, or search fields, which may provide built-in validation or different keyboard layouts on mobile devices. For longer, multi-line text input, a separate control such as a tekstikenttä of multiple lines (textarea) is used.

Across platforms, tekstikenttä is implemented with platform-specific controls: in web development, an input element; in desktop applications, components like text fields or text boxes; in mobile apps, input widgets that manage keyboard input and text rendering. Security and validation practices are important to prevent injection and ensure proper handling of submitted data.