tagIT

TagIt, often written tagit, is a term used in software to denote tagging interfaces that let users enter and manage multiple tags in a single form field. The most widely known implementation is a JavaScript/jQuery plugin named Tag-It, which turns a standard input into an interactive tag editor with autocomplete support.

The Tag-It plugin enables users to create tags by typing and pressing Enter or comma, view and remove existing tags, and optionally fetch tag suggestions from a data source to enforce consistency. Tags can be preloaded, and the final value is submitted with the form either as a delimited string or as an array of tag values, depending on configuration. The library is configurable: you can control separators, tag limits, tag styling, and event hooks for add or remove actions. It is designed to integrate with server-side frameworks and is often used in content management systems, e-commerce backends, and social apps for labeling and categorization.

History and usage: Tag-It emerged in the web development community in the early 2010s as a lightweight frontend solution for tagging. It has been distributed as open-source software on platforms such as GitHub, with multiple forks and adaptations for different ecosystems. While Tag-It represents one approach to tagging inputs, a range of other widgets, such as Tagify or Select2, provide similar functionality with additional features.

See also: tagging interface, tag management, autocomplete widgets.