reactjs - 错误：元素类型无效：需要一个字符串（用于内置组件）或一个类/函数，以防服务器端使用 react 渲染

Question

Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.

我在尝试使用<Navbar/>外部组件<Switch>（react-router-dom）时遇到这个问题，以防在进行服务器端渲染时使用 react-helmet。

标签： reactjsserver-side-renderingreact-router-v4