mutations1.js

mutations: {
  [types.SET_POSTS]: (state, response) => {
    state.posts = response.data
  },
  [types.SET_POST]: (state, response) => {
    state.current_post = response
  },
  [types.PUSH_POST]: (state, response) => {
    state.posts.push(response)
  },
  [types.SPLICE_POST]: (state, _id) => {
    state.posts = state.posts.filter(post => post._id !== _id)
  }
},

mutations2.js

mutations: {
  addTodo (state, { text }) {
    state.todos.push({
      text,
      done: false
    })
  },
  deleteTodo (state, { todo }) {
    state.todos.splice(state.todos.indexOf(todo), 1)
  },
  toggleTodo (state, { todo }) {
    todo.done = !todo.done
  },
  editTodo (state, { todo, value }) {
    todo.text = value
  },
  toggleAll (state, { done }) {
    state.todos.forEach((todo) => {
      todo.done = done
    })
  },
  clearCompleted (state) {
    state.todos = state.todos.filter(todo => !todo.done)
  }
}