使用非相对路径将MDCRipple导入自定义元素定义

Question

我遵循了https://material.io/develop/web/docs/getting-started/上的指南，但最终结果仍然有效，但是创建自定义元素以添加到混合中却没有。

my-button.js

import MDCRipple from '@material/ripple';

class MyButton extends HtmlElement {
  static get tag() { return 'my-button'; }
}

customElements.define(MyButton.tag, MyButton);

但是webpack开发服务器错误：

  

未捕获的TypeError：无法解析模块说明符“ @ material / ripple”。相对引用必须以“ /”、“./”或“ ../”开头。

更改为相对路径只会导致MDCRipple内部导入发生错误。

我很确定webpack.config.js可以解决此问题，但这对我来说是新手，为my-button.js添加条目没有帮助。

webpack.config.js

const autoprefixer = require('autoprefixer');

module.exports = {
  entry: ['./app.scss', './app.js'],
  output: {
    filename: 'bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: 'bundle.css',
            },
          },
          {loader: 'extract-loader'},
          {loader: 'css-loader'},
          {loader: 'postcss-loader',
            options: {
              plugins: () => [autoprefixer()],
            },
          },
          {
            loader: 'sass-loader',
            options: {
              includePaths: ['./node_modules'],
            },
          }
        ],
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        query: {
          presets: ['es2015'],
          plugins: ['transform-object-assign']
        },
      }
    ],
  },
};

如果有问题，可以通过（index.html）包含按钮

<script type="module" src="my-button.js"></script> 

目录结构：

node_modules/
my-button.js
index.html
package.json
webpack.config.js

package.json

devDependencies": {
  "@webcomponents/webcomponentsjs": "^2.1.3",
  "autoprefixer": "^9.2.1",
  "babel-core": "^6.26.3",
  "babel-loader": "^7.1.5",
  "babel-plugin-transform-object-assign": "^6.22.0",
  "babel-preset-es2015": "^6.24.1",
  "css-loader": "^1.0.0",
  "extract-loader": "^3.0.0",
  "file-loader": "^2.0.0",
  "glob": "^7.1.3",
  "lit-html": "^0.12.0",
  "material-components-web": "^0.40.1",
  "node-sass": "^4.9.4",
  "postcss-loader": "^3.0.0",
  "sass-loader": "^7.1.0",
  "webpack": "^3.12.0",
  "webpack-dev-server": "^2.11.3"
}