微信小程序中如何监听元素进入目标元素

Property or method "toJSON" is not defined on the instance but referenced during render

Could not register service workers: InvalidStateError: Failed to register a

一、安装cnpm1.安装：npm install -g cnpm --registry=https://registry.npm.taobao.org2.查看：cnpm -v二、在vscode中使用在vscode中使用cnpm的前提是已经安装了cnpm1.以管理员的身份运行vscode，并打开相应的项目；2.在终端中执行get-ExecutionPolicy，显示Restricted，表示状态是禁

vue3使用is动态切换组件报错Vue received a Component which was made a reactive object.

react中setState是同步的还是异步的

vscode git撤回本地提交commit

撤销之前修改的步骤的快捷键：Ctrl+z若不小心撤销多了，想返回上一步或多步，快捷键：Ctrl+y

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