Stimulus is a JavaScript behavior framework and client-side logic layer used to add interactive behavior to server-rendered HTML. It functions as a system of DOM component controllers that organize JavaScript logic into classes, allowing developers to enhance server-delivered markup without replacing the rendering process with a client-side framework.
The framework uses data attributes to bind JavaScript classes to HTML elements and map DOM events to specific methods through document-level event delegation. It employs a lifecycle manager based on mutation observers to automatically instantiate and tear down controllers as their corresponding HTML elements enter or leave the document.
The project covers client-side component management, DOM event handling, and the mapping of element targets within a controller's scope to maintain local state.
