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[Vue warn]: Unknown custom element: <vhead> - did you register the component correctly? For recursive components, make sure to provide the "name" option.出错代码<div id="app"> 我是父组件...

Note that HTML attributes are case-insensitive and camelCased props need to use their kebab-case equivalents when using in-DOM templates. You should probably use "msg-head" instead of "msgHead".报错代码...

axios使用方法axios相当于ajax，对后端发起请求，获取数据下载系统已经安装nodejs和npm包管理后，可以直接安装在当前工作目录下npm init --yes 将包管理导入到这个项目中npm install axios -S 安装axios使用直接script导入<script src="./node_modules/axios/dist/axios.js"...