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

vue报错 [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

[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: 'mode' 这个错误是我在子组件里操作父组件传过来的值时报的错,看了官方文档说要…

Vue 报错[Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders

场景:父组件向子组件传递数据,子组件去试图改变父组件数据的时候. 解决:子组件通过事件向父组件传递信息,让父组件来完成数据的更改. 比如:我的父组件是普通页面,子组件是弹窗的登录界面,父组件传递的数据(reloginDialog)控制登录界面的显示(reloginDialog = true),当登陆成功后,子组件触发一个事件,父组件捕获后(reloginDialog = false)将登录界面隐藏. 父组件调用 <re-login :dialogProp="reloginDialog&qu…

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

今天在做Vue的时候,子组件关闭的时候,报如下错误报错:vue.esm.js?65d7:610 [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 m…

Vue报错之"[Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead......"

一.报错截图 [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: "zinum" 报错代码 <!DOCTYPE htm…

[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

[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: "openFlag" 此错误出现的原因是:vue设计是单向数据流,数据的…

报错：[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 bei

项目中遇到父组件传值 activeIndex <Tabs :tabs="tabs" :activeIndex="activeIndex" ></Tabs> <script > export default{ updated(){ let currentRoute=this.$route.name; var arr=Array.from(this.$store.state.app.tabs); if(arr.indexOf(curr…

Avoid mutating a prop directly since the value will be overwritten whenever the parent component re

子组件修改父组件的值踩坑 Vue1.0升级至2.0之后,直接在子组件修改父组件的值是会报错的目的是为了阻止子组件影响父组件的数据. 我们都知道在vue中,父组件传入子组件的变量是存放在props属性中的,所有的 prop 都使得其父子 prop 之间形成了一个单向下行绑定:父级 prop 的更新会向下流动到子组件中,但是反过来则不行.(父组件更新,子组件中的prop值也会更新,但子组件不能修改由父组件传递过来的值). 报错警告:Avoid mutating a prop directly si…

Vue avoid mutating a prop directly since the value will be overwritten

<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>vue Learn</title> <script src="https://unpkg.com/vue/dist/vue.js"></script> </head> <body> <form id="form&q…

(复习)父子组件传值使用v-modal双向绑定,报错Avoid mutating a prop directly解决方案

报错:Avoid mutating a prop directly since the value will be overwritten whenever the parent component........ 原因:所有的 prop 都使得其父子 prop 之间形成了一个单向下行绑定:父级 prop 的更新会向下流动到子组件中,但是反过来则不行.(父组件更新,子组件中的prop值也会更新,但子组件不能修改由父组件传递过来的值) 不能直接对父组件传来的值进行双向绑定,要先子组件里定义新的变量…

Vue 错误：Avoid mutating a prop directly

Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. 这个错误是因为,因为我们直接修改父组件传递过来的参数,这样会存在影响外部组件的风险. 解决方案: 在组件内部再构建一套属性域,来存储父组件传递过来的参数,从而与外界解耦…

vue报错[Vue warn]: The data property "record" is already declared as a prop. Use prop default value instead.

当我写了一个子组件,点击打开子组件那个方法时报了一个错这句话说明意思呢?谷歌翻译一下↓ 数据属性“record”已声明为prop. 请改用prop默认值. 感觉翻译的有点怪,通过最后修改代码后大概意思就是,子组件接收父组件值得时候已经用了record这个key,但是在子组件的data里又定义了record所以报错…

vue报错[Vue warn]: Unknown custom element: <router-Link> - did you register the component correctly? For recursive components, make sure to provide the "name" option.

vue浏览器报错,如下 vue.runtime.esm.js?2b0e:619 [Vue warn]: Unknown custom element: <router-Link> - did you register the component correctly? For recursive components, make sure to provide the "name" option. found in ---> <App> at src/App…

Vue报错 [Vue warn]: Cannot find element

在前端开发全面进入前端的时代作为一个合格的前端开发工作者框架是不可或缺的Vue React Anguar 作为前端小白,追随大佬的脚步来到来到博客园,更新现在正在学习的Vue 注 : 相信学习Vue的都已经比较熟练的掌握了Js基础 ES6 jquery 日常代码调试 Node.js 环境 npm使用不然学Vue可能比较吃力推荐安装Vue的Chrome拓展程序方便调试代码(在谷歌商店搜索Vue 下载第一个) vue官网指南 > https://cn.vuejs.org/v2/guide/i…

iview报错[Vue warn]: Error in render: "TypeError: ctx.injections.tableRoot.$scopedSlots[ctx.props.column.slot] is not a function"

原因是我使用了iview的<Table>组件,我给Table组件的columns中定义了4个含有slot的列,但是实际在<Table>中只使用了其中3个,导致的报错. 也就是说,在 Table组件的columns中定义了多少个含有slot的列,那么在<Table>内部必须输出多少个,否则会报错…

el-select绑定值为对象时，报错[Vue warn]: <transition-group> children must be keyed: <ElTag>

解决方法: <el-select v-model="syncParams.toSlaveList" multiple value-key="ip" placeholder="请选择"> <el-option v-for="item in slaveList" :key="item.ip" :label="item.ip" :value="item"&…

vue 表单校验报错 "Error: please transfer a valid prop path to form item!"

vue 表单校验报错 "Error: please transfer a valid prop path to form item!" 原因:prop的内容和rules中定义的名称不一致! 应注意要一致. 正确:…

Vue 循环 [Vue warn]: Avoid using non-primitive value as key

页面中不添加 :key 索引的时候,会不停的提示虚线,但不影响使用后来加了一个索引,加成了:key= "content" 从后台取出来的contents是一个list,里面有多条content记录, content对象中会有id,name,等属性这时候,也不影响使用,但是控制台console中会不停的出现提示 [Vue warn]: Avoid using non-primitive value as key 意思是不要绑对象数组啥的啊, 用元素或者String类型啊然后就改了…

mac本地安装全局包报错npm WARN checkPermissions

安装本地全局包时,本地报错 npm WARN checkPermissions Missing write access to /Users/xxx/.nvm/versions/node/v11.10.0/lib/node_modules/xxxx 执行sudo还是报这个错误,在网上查找解决方法,终于解决. 打开Finder,选择前往 --> 前往文件夹 -->输入报错路径,点击前往,点开文件夹,在文件夹中删除包的全部内容.完美解决…

使用Mybatis连接到Mysql报错，WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be esta

在Eclipse中使用springboot整合Mybatis,连接到5.7版本Mysql报错WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if ex…

【log4j】springboot项目启动 ,使用的druid数据源，log4j报错 log4j:WARN Please initialize the log4j system properly.

springboot项目启动 ,使用的druid数据源,log4j报错 -- :: --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {.Final} log4j:WARN No appenders could be found for logger (druid.sql.Connection). log4j:WARN Please in…

服务器部署nginx报错 nginx: [warn] conflicting server name "localhost" on xxx.xxx.xxx.xxx:80, ignored

问题修改nginx配置参数后,使用nginx -t检查配置. 提示successfull后就可以使用 nginx -s reload来重新加载配置我配置的过程中遇到这样的问题,就是绑定了主机名后,重新加载配置时会出现警告 nginx: [warn] conflicting server name "localhost" on xxx.xxx.xxx.xxx:80, ignored 方法网上有说,是两三个搞了同一个ip和端口号或名字的,要我们改. 而且这个也只是警告,不影响使用.…

报错：WARN [WorkerSender[myid=1]:QuorumCnxManager@584] - Cannot open channel to 2 at election address /x.x.x.x:3888

报错背景: zookeeper安装完成之后,启动之后正常,但是查看log文件zookeeper.log时发现报错. 报错现象: -- ::, [myid:] - INFO [WorkerSender[myid=]:QuorumPeer$QuorumServer@] - Resolved hostname: 192.168.52.27 to address: /192.168.52.27 -- ::, [myid:] - INFO [WorkerReceiver[myid=]:FastLeader…

IDEA 运行报错：WARN: Establishing SSL connection

使用JDBC连接数据库时出现报错, 报错内容:Wed Sep 26 14:30:31 CST 2018 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default…

解决IE报错[vue router]Failed to resolve async component default:strict 模式下不允许分配到只读属性

之前遇到过一个奇怪的问题,在其他浏览器下一切正常,但在万恶的IE下,却一直不行. 具体问题场景就是:比如orderDetail页面出现问题,那么只要是路由跳转的,点第1次无法跳转,必须得点第2次才可以跳转,但是跳转过去之后,页面也是一片空白,不加载路由页面.然后控制台报错:strict 模式下不允许分配到只读属性. 所以我往这方面搜索,在网上看到一些相关信息 IE中JavaScript异常提示:strict 模式下不允许分配到只读属性.报异常的代码如下: document.getElementB…

[Vue warn]: Avoid using non-primitive value as key

<el-select v-model="addform.province" placeholder="请选择省份" multiple> <el-option v-for="item in provinces" :key="item" :label="item.value" …

.Net EF Core数据库使用SQL server 2008 R2分页报错How to avoid the “Incorrect syntax near 'OFFSET'. Invalid usage of the option NEXT in the FETCH statement.”

一. 问题说明最近.Net EF core 程序部署到服务器,服务器数据库安装的是SQL server 2008 R2,我本地用的的是SQL server 2014,在用到分页查询时报错如下: How to avoid the “Incorrect syntax near 'OFFSET'. Invalid usage of the option NEXT in the FETCH statement.” 通过问题描述可以分析是数据库SQL server 2008 R2版本SQL语句不支持关…

使用饿了么ui表单验证报错: [Element Warn][Form]model is required for validat

[Element Warn][Form]model is required for validat 如文末的完整例子: 该提示说的是 form表单需要一个绑定一个对象(使用:model="editform" 不能使用v-model="editform"), 同时v-model="multipleSelectionStudent" 的multipleSelectionStudent一定一定一定要在editform对象中, 而例子中v-model=…

Vue开发警告[Vue warn]: Avoid replacing instance root $data. Use nested data properties instead.

Avoid replacing instance root $data. Use nested data properties instead. 翻译避免替换实例根$data.请改用嵌套数据属性错误的代码 const demoData={ name:"小明", age:19 } this.$data=demoData; //此种直接赋值即会导致警告产生(对象的拷贝默认是深拷贝即引用) 产生原因最新的Vue已经不允许这样直接对跟实例$data进行赋值解决方案使用 Object.…

vue的开发中v-for报错 [vue/require-v-for-key] Elements in iteration expect to have 'v-bind:key' directives.

用的VS Code 工具,安装了vetur插件,报错了如下 [eslint-plugin-vue] [vue/require-v-for-key] Elements in iteration expect to have 'v-bind:key' directives.eslint-plugin-vue 在Vue 的版本里,当在组件中使用v-for时,key是必须的. 解决办法: 在文件 –>首选项 –>设置 –>在搜索框中输入:vetur.validation.template–>…

Linux下启动tomcat报错，WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.net.ConnectException:

tomcat启动完了之后,一直不停的打印这种错误信息,看表面上,应该是zk节点下的数据是空的,连接不上服务,所以一直在尝试连接,然后一直又连不上: 完整的错误信息: 407662 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server 127.0.0.1/127.0.0.1:2…

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