vue/types/plugin.d.ts

import { Vue as _Vue } from './vue';

export type PluginFunction<T> = (Vue: typeof _Vue, options?: T) => void;

export interface PluginObject<T> {
  install: PluginFunction<T>;
  [key: string]: any;
}

export type Plugin<T> = PluginFunction<T> | PluginObject<T>;