Function feature

packages/core/src/render3/features/host_directives_feature.ts:47–60

(definition: DirectiveDef<unknown>)

  rawHostDirectives: HostDirectiveConfig[] | (() => HostDirectiveConfig[]),
) {
  const feature: DirectiveDefFeature = (definition: DirectiveDef<unknown>) => {
    const isEager = Array.isArray(rawHostDirectives);

    if (definition.hostDirectives === null) {
      definition.resolveHostDirectives = resolveHostDirectives;
      definition.hostDirectives = isEager
        ? rawHostDirectives.map(createHostDirectiveDef)
        : [rawHostDirectives];
    } else if (isEager) {
      definition.hostDirectives.unshift(...rawHostDirectives.map(createHostDirectiveDef));
    } else {
      definition.hostDirectives.unshift(rawHostDirectives);
    }
  };
  feature.ngInherit = true;
  return feature;
}