app_vue2/plugins/route.ts

import { Plugin } from '@nuxt/types'

const routePlugin: Plugin = (ctx) => {
  if (ctx.app.router) {
    ctx.app.router.beforeEach((to, from, next) => {
      if (ctx.store.state.form.dirty) {
        ctx.store.commit('form/setShowConfirmToLeave', true)
        ctx.store.commit('form/setGoAfterLeave', to)
      } else {
        next()
      }
    })

    ctx.app.router.afterEach(() => {
    })
  }
}

export default routePlugin