Vue中mixins的使用方法详解

// 在 myMixins.js 中定义一个 age 字段和 getAge 方法,用来获取年龄信息
export const myMixins = {
  data() {
    return {
      age: 18,
    }
  },
  mounted() {
    this.getAge()
  },
  methods: {
    getAge() {
      console.log(this.age)
    }
  }
}

// 在第一个组件中引入 mixins，并且对 age 加1 
import { myMixins } from "@/mixins/myMixins.js";
export default {
  mixins: [myMixins],
  data() {
    return {}
  },
  created() {
    this.age++
  },
}
// 发现控制台输出 19，说明当前组件的 age 变化了 

// myMixins.js
export const myMixins = {
  components:{},
  data() {
    return {}
  },
  created() {
    console.log('data from mixins')
  }
}
// 组件中引入 mixins
import { myMixins } from "@/mixins/myMixins.js";
export default {
  mixins: [myMixins],
  data() {
    return {}
  },
  created() {
    console.log('data from template')
  }
}
// 先输出混入对象的值，再输入组件的值
// data from mixins
// data from template

// myMixins.js 中直接返回异步函数
export const myMixins = {
  components:{},
  data() {
    return {
      num: 1,
    }
  },
  methods: {
   async getDate1() {
      let result = await new Promise((resolve,reject) => {
          let a = 1;
          setTimeout(() => {
            resolve(1)
          },500)
       })
       return result
    },
  }
}
// 组件中获取混入的异步函数，通过then 方法获取函数值。
import { myMixins } from "./myMixins.js";
export default {
  mixins: [myMixins],
  data() {
    return {}
  },
  mounted() {
    this.getDate1().then(res => {
      console.log(res)
    })
  }
}