Webpack 输出中的 Mimetype 错误（使用 knockout）

Question

这是我第一次使用 Knockout。我想将它与节点、webpack 和 es6 一起使用，但由于某种原因，我创建的包导致浏览器出错：

"Refused to execute script from 'http://localhost:8080/build/bundle.js' because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled."

我的webpack.config.js是：

const path = require('path')


module.exports = {
      output: {
        path: path.resolve('build', './bundle.js'),
        filename: 'bundle.js'
      },
      module: {
        loaders: [
        {
          test: /\.html$/, loader: 'html'
        },
          {
            test: /\.js?$/,
            exclude: /(node_modules)/,
            loader: 'babel-loader',

          },
        ]
    }
};

package.json 文件是：

{
  "name": "neighborhoodmap",
  "version": "1.0.0",
  "description": "Neighborhood Map App with API Calls",
  "main": "app.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "dev": "node_modules/webpack-dev-server/bin/webpack-dev-server.js",
    "build": "webpack"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "knockout": "^3.4.2"
  },
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.2",
    "babel-preset-es2015": "^6.24.1",
    "html-loader": "^0.5.1",
    "imports-loader": "^0.7.1",
    "webpack": "^3.8.1",
    "webpack-dev-server": "^2.9.5"
  }
}

app.js 文件是：

import ko from 'knockout';


class MyApp {
  constructor() {
    this.message = "Hello World";
  }
}

ko.applyBindings(new MyApp())

而实际的index.html是：

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Neighborhood Map</title>
  </head>
  <body>
    <h1 data-bind="text: message"></h1>

    <script type="text/javascript" src="build/bundle.js"></script>
  </body>
</html>

我正在使用 webpack-dev-server 为应用程序提供服务，但即使我只是将 index.html 放在浏览器中，包仍然存在错误：

"Uncaught SyntaxError: Unexpected token < for build/bundle.js:1"

有没有办法指定包输出的 mimetype？或者我的 webpack.config.js 有误？任何帮助将不胜感激。

Answer 1

对于任何运行遇到同样问题的人，我通过在模块属性下的 webpack 配置文件中包含一个 noParse 来阻止 webpack 解析淘汰构建来解决我的问题。最终的 webpackconfig.js 文件如下所示：

const path = require('path');


module.exports = {
    devtool: 'sourcemap',
      entry: './app.js',
      output: {
        path: path.resolve('build', ''),
        filename: 'bundle.js'
      },
      module: {
      noParse: /node_modules\/knockout\/build\/output\/*.js/,
      loaders: [
        {
          test: /\.html$/, loader: 'html'
        },
          {
            test: /\.js?$/,
            exclude: /(node_modules)/,
            loader: 'babel-loader',
            query: {
                presets: ['es2015']
            }
          },
        ]
    }
};

Webpack 输出中的 Mimetype 错误（使用 knockout）

Mimetype Error In Webpack Output (using knockout)

node.js

mime-types

knockout.js

webpack

webpack-dev-server