Question

我是React的新手，看着这个ReactTraining。我想将我的一些路径设为私有（这样您只能在登录时查看它们）。我能够很好地验证用户身份并将他们引导到新页面，但现在我想＆＃34; Protect＆＃34;该页面只有在登录后才能访问。我发现了一些似乎使用相同的sources {＃3}; PrivateRoute＆＃34;功能如下。到目前为止，一切似乎都很有效（并且有意义），除了＆＃34; ...休息＆＃34;以下代码的一部分：

const PrivateRoute = ({ component: Component, ...rest }) => (
  <Route {...rest} render={props => (
    fakeAuth.isAuthenticated ? (
      <Component {...props}/>
    ) : (
      <Redirect to={{
        pathname: '/login',
        state: { from: props.location }
      }}/>
    )
  )}/>
)

我收到以下错误：

Uncaught Error: Cannot find module "./components/Login"
    at webpackMissingModule (router.js:9)
    at Object.<anonymous> (router.js:9)
    at __webpack_require__ (bootstrap 18b9132…:555)
    at fn (bootstrap 18b9132…:86)
    at Object.<anonymous> (index.js:22)
    at __webpack_require__ (bootstrap 18b9132…:555)
    at fn (bootstrap 18b9132…:86)
    at Object.<anonymous> (bootstrap 18b9132…:578)
    at __webpack_require__ (bootstrap 18b9132…:555)
    at bootstrap 18b9132…:578
webpackMissingModule @ router.js:9
(anonymous) @ router.js:9
__webpack_require__ @ bootstrap 18b9132…:555
fn @ bootstrap 18b9132…:86
(anonymous) @ index.js:22
__webpack_require__ @ bootstrap 18b9132…:555
fn @ bootstrap 18b9132…:86
(anonymous) @ bootstrap 18b9132…:578
__webpack_require__ @ bootstrap 18b9132…:555
(anonymous) @ bootstrap 18b9132…:578
(anonymous) @ bootstrap 18b9132…:578
webpackHotDevClient.js:233 Error in ./src/components/Login.js
Syntax error: Unexpected token (16:46)

  14 | 
  15 | 
> 16 | const PrivateRoute = ({ component: Component, ...rest }) => (
     |                                               ^
  17 | <Route {...rest} render={props => (
  18 |   fakeAuth.isAuthenticated ? (
  19 |     <Component {...props}/>

 @ ./src/router.js 25:13-42

似乎我正在导入我应该做的所有事情，所以我的想法是我没有安装应该是的东西。

有谁知道我可能需要安装什么才能解决此错误？

Answer 1

spread ... syntax不属于es2015或react babel预设。它目前是第3阶段提案。要在React项目中支持传播，请安装babel stage 3插件：

npm install --save-dev babel-preset-stage-3

并将其添加到您的.babelrc：

{
  "presets": [
    "es2015",
    "react",
    "stage-3"
  ]
}

反应JS错误＆＃34; ...休息＆＃34;语法错误：意外的令牌

1 个答案: