Function resolveAsset

packages/runtime-core/src/helpers/resolveAssets.ts:77–131

(
  type: AssetTypes,
  name: string,
  warnMissing = true,
  maybeSelfReference = false,
)

function resolveAsset(type: typeof FILTERS, name: string): Function | undefined
// implementation
function resolveAsset(
  type: AssetTypes,
  name: string,
  warnMissing = true,
  maybeSelfReference = false,
) {
  const instance = currentRenderingInstance || currentInstance
  if (instance) {
    const Component = instance.type

    // explicit self name has highest priority
    if (type === COMPONENTS) {
      const selfName = getComponentName(
        Component,
        false /* do not include inferred name to avoid breaking existing code */,
      )
      if (
        selfName &&
        (selfName === name ||
          selfName === camelize(name) ||
          selfName === capitalize(camelize(name)))
      ) {
        return Component
      }
    }

    const res =
      // local registration
      // check instance[type] first which is resolved for options API
      resolve(instance[type] || (Component as ComponentOptions)[type], name) ||
      // global registration
      resolve(instance.appContext[type], name)

    if (!res && maybeSelfReference) {
      // fallback to implicit self-reference
      return Component
    }

    if (__DEV__ && warnMissing && !res) {
      const extra =
        type === COMPONENTS
          ? `\nIf this is a native custom element, make sure to exclude it from ` +
            `component resolution via compilerOptions.isCustomElement.`
          : ``
      warn(`Failed to resolve ${type.slice(0, -1)}: ${name}${extra}`)
    }

    return res
  } else if (__DEV__) {
    warn(
      `resolve${capitalize(type.slice(0, -1))} ` +
        `can only be used in render() or setup().`,
    )
  }
}

function resolve(registry: Record<string, any> | undefined, name: string) {
  return (