Function defineComponent

packages/runtime-core/src/apiDefineComponent.ts:305–315

(
  options: unknown,
  extraOptions?: ComponentOptions,
)

// implementation, close to no-op
/*@__NO_SIDE_EFFECTS__*/
export function defineComponent(
  options: unknown,
  extraOptions?: ComponentOptions,
) {
  return isFunction(options)
    ? // #8236: extend call and options.name access are considered side-effects
      // by Rollup, so we have to wrap it in a pure-annotated IIFE.
      /*@__PURE__*/ (() =>
        extend({ name: options.name }, extraOptions, { setup: options }))()
    : options
}