警告:收到非布尔属性`jsx`的`true`。Zeit样式的Jsx

Question

我正在尝试通过一些代码使用styled-jsx。然而，无论我做什么，我似乎都会得到一个错误

index.js:1437 Warning: Received `true` for a non-boolean attribute `jsx`.

If you want to write it to the DOM, pass a string instead: jsx="true" or jsx={value.toString()}.
    in style (at App.js:12)
    in div (at App.js:9)
    in Test (created by Route)
    in Route (at App.js:29)
    in Router (created by BrowserRouter)
    in BrowserRouter (at App.js:27)
    in App (at src/index.js:7)

我已经尝试重新安装node_modules，确保我的配置都是正确的，并测试了不同的版本。

我的package.json

{
  "name": "preview",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "contentful": "^7.4.1",
    "react": "^16.8.6",
    "react-dom": "^16.8.4",
    "react-router-dom": "^4.3.1",
    "react-scripts": "^3.0.1",
    "socket.io-client": "^2.2.0",
    "styled-jsx": "^3.2.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "babel": {
    "presets": [
      "@babel/preset-stage-2"
    ],
    "plugins": [
      "styled-jsx/babel"
    ]
  },
  "browserslist": [
    ">0.2%",
    "not dead",
    "not ie <= 11",
    "not op_mini all"
  ],
  "proxy": "http://localhost:5000/"
}

我的示例React代码仍然会抛出错误。

const Test = () => {
    return (
        <div>
        <p>test
        </p>
        <style jsx>{
            `
            p {
                color: red;
            }
            `
        }
        </style>
        </div>)
}

class App extends Component {

  render () {
    return (
      <Router>

        <Route path='/test' component={Test}/>

      </Router>

    )
  }

}

export default App;

我希望不会有任何基于文档的错误消息

Answer 1

好的。因为我自己在解决这个问题之前花了几个小时，所以我希望我能帮助你们也有这个问题的人。

要将styled jsx与create-react-app一起使用，您需要：

package.json中的

1. yarn add react-app-rewired customize-cra
2. replace

    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",

使用

    "start": "react-app-rewired start",
    "build": "react-app-rewired build",
    "test": "react-app-rewired test",

1. 创建(在根目录中，package.json旁边)文件config-overrides.js

const { override, addBabelPlugin, addBabelPreset } = require('customize-cra');
module.exports = override(
    addBabelPlugin('styled-jsx/babel')
);

在根目录文件.babelrc中创建

1. (仅在运行jest test)

时使用

{
    "plugins": ["styled-jsx/babel"]
}

在您的index.js (或将React挂载到DOM的位置)中，在调用ReactDOM.render(....)之前，插入取自https://github.com/vercel/styled-jsx/issues/560#issuecomment-599371026的以下代码

const _JSXStyle = require('styled-jsx/style').default;
if (typeof global !== 'undefined') {
    Object.assign(global, { _JSXStyle });
}

这是不幸的，但这个复杂的配置没有它就有点反复无常。

仅当您将yarn build或yarn test与create-react-app一起使用时，才需要步骤4和5。

Answer 2

此问题的答案在警告中。只需将样式的jsx属性类型从boolean转换为string即可：

来自：<style jsx> {your style here} </style>

收件人：<style jsx="true"> {your style here} </style>

Answer 3

如果任何人还在受苦，请尝试在styled-jsx文档中找到以下代码片段：

import _JSXStyle from 'styled-jsx/style'
export default () => (
  <div className="jsx-123">
    <p className="jsx-123">only this paragraph will get the style :)</p>
    <_JSXStyle id="123">{`p.jsx-123 {color: red;}`}</_JSXStyle>
  </div>
)

对我来说很有吸引力。

https://github.com/vercel/styled-jsx