vue-devtools/packages/shell-dev-vue2/src/dynamic-module.js

export const dynamic = {
  namespaced: true,
  state() {
    return {
      dynamic: true,
    }
  },
  getters: {
    notDynamic: (state) => {
      if (state) {
        return !state.dynamic
      }
    },
  },
  mutations: {
    TOGGLE: (state) => {
      state.dynamic = !state.dynamic
    },
  },
}

export const nested = {
  namespaced: true,
  state() {
    return {
      nested: true,
    }
  },
  getters: {
    notNested: (state) => {
      if (state) {
        return !state.nested
      }
    },
  },
  mutations: {
    TOGGLE_NESTED: (state) => {
      state.nested = !state.nested
    },
  },
}

export const deeplyNested = {
  namespaced: true,
  modules: {
    child: {
      namespaced: true,
      state() {
        return {
          childMessage: 'hello from child',
        }
      },
      getters: {
        upercaseChildMessage: state => state.childMessage.toUpperCase(),
      },
    },
  },
}