vue-10-混合

// 定义一个混合对象
var myMixin = {
  created: function () {
    this.hello()
  },
  methods: {
    hello: function () {
      console.log(‘hello from mixin!‘)
    }
  }
}
// 定义一个使用混合对象的组件
var Component = Vue.extend({
  mixins: [myMixin]
})

//创建实例
var component = new Component() // => "hello from mixin!"

var mixin = {
  created: function () {
    console.log(‘混合对象的钩子被调用‘)
  }
}

new Vue({
  mixins: [mixin],
  created: function () {
    console.log(‘组件钩子被调用‘)
  }
})

var mixin = {
  methods: {
    conflicting: function () {
      console.log(‘from mixin‘)
    }
  }
}

var vm = new Vue({
  mixins: [mixin],
  methods: {
    conflicting: function () {
      console.log(‘from self‘)
    }
  }
})
vm.conflicting() // => "from self"

//会影响到每个单独创建的 Vue 实例 (包括第三方模板)，可以将其用作 Plugins 以避免产生重复应用

Vue.mixin({
  created: function () {
    var myOption = this.$options.myOption
    if (myOption) {
      console.log(myOption)
    }
  }
})
new Vue({
  myOption: ‘hello!‘
})

Vue.config.optionMergeStrategies.myOption = function (toVal, fromVal) {
  // return mergedVal
}

//大多数时候使用methods的合并策略
var strategies = Vue.config.optionMergeStrategies
strategies.myOption = strategies.methods


//使用computed的合并策略
const merge = Vue.config.optionMergeStrategies.computed
Vue.config.optionMergeStrategies.vuex = function (toVal, fromVal) {
  if (!toVal) return fromVal
  if (!fromVal) return toVal
  return {
    getters: merge(toVal.getters, fromVal.getters),
    state: merge(toVal.state, fromVal.state),
    actions: merge(toVal.actions, fromVal.actions)
  }
}