控制台警告：在控制台的Settings进行设置去掉框柱的两项的√警告消失：

学习react过程中，需要安装react-transition-group，但每次都要打开cmd安装包有点麻烦，想直接在vscode的终端进行安装。但此时默认终端是powershell，那怎么切换成cmd呢？方法如下：1.点击红框powershell，2.弹出菜单中点选择默认Shell3.选择自己需要的Shell,我这里需要cmd所以我点cmd4.如果发现控制台shell还是没变化，则重启vsco

Warning: Functions are not valid as a React child. This may happen if you return a Component instead of <Component /> from render. Or maybe you meant to call this function rather than return it.