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Change value of a props in beforeDestroy/Destroyed cycle of child component does not work

Asked By: Anonymous

Hi I made a boolean value in parent component, and passed it to the child component as a props. it has initialized as false, and after the user view the component, the value will change to true, which means the page has been visited.

I have done some research and followed How to properly pass data from child to parent and parent to child component?

here is my js code:

    export default {
        props: {
            hasLoad: {
                type: Boolean
        data () {
            return {
                hasLoadModel: this.hasLoad
        created: function() {
        beforeDestroy: function() {
            this.hasLoadModel = true;
            this.hasLoad = true;

and html code

<div v-model="skillLoadModel">..</div>

But I still get

[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.

I have tried to change the value at either of beforeDestroy or Destroyed, or do not use v-model, but none of them works. The value has changed after I left the page, but when I reenter the page, the value has reset to default value.

Can someone help me please?


Answered By: Anonymous

Don’t change the value of the prop. Have the component emit an event so that the parent can take the appropriate action.

Below is an example of a component that is created when the checkbox is checked, and is destroyed when it gets unchecked. The component emits a “dying” event, and the parent receives it and prints a scream to the console.



new Vue({_x000D_
  el: '#app',_x000D_
  data: {_x000D_
    showIt: true_x000D_
  methods: {_x000D_
    scream() {_x000D_
  components: {_x000D_
    myComponent: {_x000D_
      beforeDestroy: function() {_x000D_


<a href="//[email protected]/dist/vue.js">//[email protected]/dist/vue.js</a>_x000D_
<div id="app">_x000D_
  <input type="checkbox" v-model="showIt">_x000D_
  <my-component v-if="showIt" hasload="true" @dying="scream" inline-template>_x000D_
    <div>Here I am</div>_x000D_




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