Glossary

Term	Meaning
setup	Often means the component body: the code in the component function that runs once on creation—reactive state, lifecycle registration, etc.
Render function / component render function	The function returned from the component body (or render on a returned object), invoked on each refresh to produce the current JSX.
reactive	Wraps an object in a reactive proxy; property access can be tracked as view dependencies.
createSignal / signal	createSignal(initial) creates function-style state: signal() to read, signal.set(v) to write.
computed	Cached derived value; read via .value.
watch / watchEffect	Run callbacks or effects when dependencies change; often auto-cleaned on unmount (see Reactivity).
createApp	Create a browser app instance (from @viewfly/platform-browser).
mount / destroy	Attach the app to a DOM node / tear down and clean up.
Provider / inject	DI: parents register values; children inject them (see Dependency injection).
RouterModule / RouterOutlet / Link	App module, outlet, and declarative links from @viewfly/router (see Router).
withMark	Adds custom DOM markers for rendered nodes—pairs with scoped CSS (see Scoped CSS).