'import' 和 'export' 可能只出现在顶层 [英] 'import' and 'export' may only appear at the top level

问题描述

我正在使用带有 vuejs 的 webpack.Webpack 做了它的事情，但是当我查看输出的 app.js 文件时，它给了我这个错误.

I'm using webpack with vuejs. Webpack does its thing, but when I look at the outputted app.js file, it gives me this error.

'import' 和 'export' 只能出现在顶层

'import' and 'export' may only appear at the top level

我假设这是 babel 不转换代码的问题?因为我在查看应用程序时在浏览器中得到了这个.

I'm assuming it's a problem with babel not converting the code? Because I'm getting this in the browser when viewing the application.

意外的令牌导入

这是我的 vuejs 应用程序的 entry.js:

/*jshint esversion: 6 */
import Vue from 'vue';
import App from './App.vue';
import VueRouter from 'vue-router';
Vue.use(VueRouter);
require('./css/style.scss');

// Export the vue router
export var router = new VueRouter({
  hashbang: false,
  root: '/'
  // history: true
});

// Set up routing and match routes to components
router.map({
  '/': {
    component: require('./components/home/Home.vue')
  }
});

// Redirect to the home route if any routes are unmatched
router.redirect({
  '*': '/'
});

// Start the app on the #app div
router.start(App, '#app');

这是我的 webpack.config.js:

var ExtractTextPlugin = require('extract-text-webpack-plugin');
var path = require('path');

module.exports = {
  entry: './src/entry.js',
  output: {
      filename: './public/js/app.js'
  },
  devtool: 'source-map',
  plugins: [
    new ExtractTextPlugin('./public/css/style.css')
  ],
  module: {
    preLoaders: [{
        test: /.js$/, 
        exclude: /node_modules/,
        loader: 'jshint-loader'
    }],
    loaders: [{
        test: /.scss$/,
        loader: ExtractTextPlugin.extract(
            'style',
            'css!sass'
        ),
    },
    {
        test: /.vue$/,
        loader: 'vue'
    },
    {
        test: /.js$/,
        exclude: /node_modules/,
        include: [
          path.resolve(__dirname, "src/services"),
        ],
        loader: 'babel-loader',
        query: {
          presets: ['es2015']
        }
    }]
  }
};

这是我的packages.json文件:

Here's my packages.json file:

{
  "name": "test-webpack",
  "version": "1.0.0",
  "description": "Myapp",
  "main": "entry.js",
  "scripts": {
    "watch": "webpack-dev-server  --host $IP --port $PORT  --hot --inline --config webpack.config.js",
    "dev": "webpack",
    "build": ""
  },
  "author": "Dev",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.9.1",
    "babel-loader": "^6.2.4",
    "babel-plugin-transform-class-properties": "^6.10.2",
    "babel-plugin-transform-runtime": "^6.9.0",
    "babel-preset-es2015": "^6.9.0",
    "babel-runtime": "^6.9.2",
    "css-loader": "^0.23.1",
    "extract-text-webpack-plugin": "^1.0.1",
    "jshint": "^2.9.2",
    "jshint-loader": "^0.8.3",
    "node-sass": "^3.8.0",
    "path": "^0.12.7",
    "sass-loader": "^3.2.0",
    "style-loader": "^0.13.1",
    "vue-hot-reload-api": "^1.3.2",
    "vue-html-loader": "^1.2.2",
    "vue-loader": "^8.5.2",
    "vue-style-loader": "^1.0.0",
    "webpack": "^1.13.1",
    "webpack-dev-server": "^1.14.1"
  },
  "dependencies": {
    "vue": "^1.0.25",
    "vue-router": "^0.7.13"
  }
}

推荐答案

当我缺少右括号时出现此错误.

I got this error when I was missing a closing bracket.

简化娱乐:

const foo = () => {
  return (
    'bar'
  );
}; <== this bracket was missing

export default foo;

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