vue2.0 子组件props接受父组件传递的值，能不能修改的问题整理

1、 vue中，父子组件通信最常用的方式就是props和 $emit，但是父组件传递给子组件的数据，能不能进行修改，修改后都有啥问题呢

2、先上代码：

父组件代码：

<!--  -->
<template>
    <div class=''>
      <el-link type="danger">传值为对象：</el-link>
      <div>
        父组件中显示fatherData的值：{{fatherData}}
        <l0705components :fatherData="fatherData"></l0705components>
      </div>
      <br><br><br>
      <el-link type="danger">传值为字符串，使用v-model传值：</el-link>
      <div>
        父组件中显示fatherData2的值：{{fatherData2}}
        <l0705components v-model="fatherData2"></l0705components>
      </div>
      <br><br>
      <el-link type="danger">传值为字符串：</el-link>
      <div>
        父组件中显示fatherData3的值：{{fatherData3}}
        <l0705components :fatherData3="fatherData3"></l0705components>
      </div>
    </div>
</template>

<script>
    import l0705components from './views/l0705components'
    export default {
        name: "L0705L",
        components: {
          l0705components
        },
        data() {
            // 这里存放数据
            return {
              fatherData:{
                name:"李四",
                age:"14"
              },
              fatherData2:'父组件的数据2',
              fatherData3: '父组件的数据3'
            }
        }
    }
</script>

　　子组件代码：

<!--  -->
<template>
    <div class=''>
      <div v-if="fatherData">
        子组件中显示fatherData的值：{{fatherData}}
        <el-button type="danger" @click="changeFather">
          点击修改父组件fartherData的值-姓名改为“王五”
        </el-button>
      </div>

      <div v-if="value!==''">
        <input v-model="value">
      </div>

      <div v-if="fatherData3!==''">
        子组件中显示fatherData3的值：{{fatherData3}}
        <el-button type="danger" @click="changeFather3">
          点击修改父组件fartherData3的值,改为“哈哈哈哈哈”
        </el-button>
      </div>

    </div>
</template>

<script>
    export default {
      props:{
        fatherData:{
          type:Object
        },
        value: {
          type: String,
          default: ''
        },
        fatherData3: {
          type: String,
          default: ''
        }
      },
        name: "l0705components",
        data() {
            // 这里存放数据
            return {
            }
        },
        // 方法集合
        methods: {
          changeFather(){
            this.fatherData.name = '王五'
          },
          changeFather3() {
            this.fatherData3 = '哈哈哈哈哈'
          }
        }
    }
</script>

3、页面展示：