eslint “parsing error: Unexpected token {” in JSX

问题:

const title = 'My Minimal React Webpack Babel Setups';

const App = () => (<div><b>{title}</b><img src={img} /></div>)

This code occurs an error "ESLint Parsing Error: Unexpected token {"

my .eslintrc.js file is like that

module.exports = {
    "extends": "airbnb"
};

and I install the packages like that

"eslint": "^5.9.0",
"eslint-config-airbnb": "^17.1.0",
"eslint-loader": "^2.1.1",
"eslint-plugin-import": "^2.14.0",
"eslint-plugin-jsx-a11y": "^6.1.2",
"eslint-plugin-react": "^7.11.1",

I thought that ESLint can read JSX because the token "<" doesn't occur error. (When I change the extends section in .eslintrc.js file to "airbnb-base", It occurs error "ESLint Parsing Error: Unexpected token <. But now, the token "<" doesn't occur error)

However, my ESLint cannot read the JSX syntax line {variable}

回答1:

Eslint on its own is not good enough. First install babel-eslint:

npm install --save-dev babel-eslint

Or with yarn:

yarn add -D babel-eslint

Then add to your .eslintrc file:

"parser": "babel-eslint"

You might want to install eslint-plugin-babel as well, but I believe this is not needed

回答2:

I've got the same error on Next.js.

These steps solved my issue:

1) Install babel-eslint:

npm install --save-dev babel-eslint

2) Add babel-eslint as a parser to eslint config

"parser": "babel-eslint"

---

My eslint config looks like this (.eslintrc):

{
  "env": {
    "browser": true,
    "es6": true,
    "commonjs": true,
    "node": true
  },
  "extends": ["eslint:recommended", "plugin:react/recommended"],
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 9,
    "ecmaFeatures": {
      "jsx": true
    },
    "sourceType": "module"
  },
  "plugins": ["react"],
  "rules": {
    "react/react-in-jsx-scope": 0,
    "no-console": 1
  }
}

回答3:

My .eslintr has this extra configuration to enable JSX

"parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    }
  }