Simple vue plugin ecample

example.js

// in /src/plugins/ directory
import Vue from 'vue'

const Example = {
  install (Vue, options) {
    Vue.prototype.$methodName = (param) => {
      // Your code here.
    }
    Vue.prototype.$methodName1 = (param1, param2) => {
      // Your code here.
    }
  }
}

Vue.use(Example)

main.js

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
import App from './App'
import router from './router'
import store from './store'
import './plugins/example.js' // This imports the chat plugin and makes it available in components via this.$methodName

// Other stuff here

/* eslint-disable no-new */
new Vue({
  el: '#app',
  router,
  store,
  components: { App },
  template: '<App/>'
})