解决[Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent

❤️砥砺前行，不负余光，永远在路上❤️

目录

• • 前言
  • 一、使用watch
  • 二、

前言

[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: “previewList”

一、使用watch

  watch: {previewList: {handler(val) {console.log(val, 'val');this.fileList = val;},immediate: true,},},

网上好多说是直接data中赋值给另外一个变量，好像没用，我这直接改previewList的话就会报错，使用watch监听一下然后赋值给fileList就好了，修改的时候直接改fileList就可以。

二、