vue3.0之watchEffect,watch用法
2021/4/9 10:55:26
本文主要是介绍vue3.0之watchEffect,watch用法,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
<template> <div>{{propContent}}</div> </template> <script> import { watchEffect, watch, ref } from "vue"; export default { name: "", components: {}, mixins: [], props: { listArr: { type: Object }, list1: { type: String } }, setup(props, content) { let propContent = ref(0); watch( () => props.list1, (val, oldval) => { /* ... */ propContent.value = parseInt(val) + 2; console.log("val", val); console.log("oldval", oldval); console.log("propContent", propContent); }, { immediate: true, deep: true } ); // watchEffect(() => { // console.log("watchEffect", props); // propContent.value = parseInt(props.list1) + 2; // console.log("propContent", propContent); // }); return { propContent }; } }; </script> <style lang="less" scoped> </style>
从父组件传了input框的(可以动态改)
list1,然后子组件里面监听这篇关于vue3.0之watchEffect,watch用法的文章就介绍到这儿,希望我们推荐的文章对大家有所帮助,也希望大家多多支持为之网!
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