• vue 父子组件互相传值容易出现的报错


    对于父子组件之间的互相传值,报错如下:

    [Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "propTextTip"

    大概意思是:避免直接更改一个PROP,因为每当父组件重新呈现时,该值就会被覆盖。

    解决办法:

    不要直接引用父组件传过来的值,可以把接收到的父组件的值赋值给一个新的参数

     1 <template>
     2   <div>
     3     <span>子组件</span>
     4     <input type="text" name="" v-model.trim="textTip">
     5     <button type="button" class="btn btn-success btn-xs" v-on:click="callFather">通知父组件</button>
     6   </div>
     7 </template>
     8 <script>
     9 
    10 
    11 export default {
    12   data() {
    13     return {
    14       textTip:this.propTextTip
    15     }
    16   },
    17    props:['propTextTip'],
    18   methods:{
    19       callFather:function() {
    20           //发射信号
    21           console.log(this.textTip);
    22           this.$emit('getCalled',this.textTip);
    23           //其中 getCalled 是一个自定义的事件,功能类似于一个中转
    24       }
    25   }
    26 }
    27 
    28 </script>
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  • 原文地址:https://www.cnblogs.com/cristina-guan/p/9269275.html
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