javascript - 带有 webpack 的 Paper.js

Question

我正在尝试使用 react-starter-kit 将 paper.js 与 webpack 结合使用.

仅供引用，我必须安装 json-loader 和 node-loader，我还必须将 Node 添加到 webpack 配置中，以摆脱构建像这样的错误

ERROR in ./~/paper/dist/paper-node.js
Module not found: Error: Cannot resolve module 'fs' in /home/bojan/www/react/MyApp/node_modules/paper/dist
 @ ./~/paper/dist/paper-node.js 4808:3-16 10779:10-23 12253:10-23

这是我的 webpack.config.js 的样子

var config = {
  ...

  resolve: {
    extensions: ['', '.webpack.js', '.web.js', '.js', '.jsx', '.json', '.node']
  },

  module: {
    loaders: [
      {
        test: /\.json$/,
        loader: "json-loader"
      },
      {
        test: /\.node$/,
        loader: "node-loader"
      },
      ...
    ]
  },

  node: {
    child_process: 'empty',
    console: 'empty',
    dgram: 'empty',
    dns: 'empty',
    fs: 'empty',
    net: 'empty',
    tls: 'empty'
  }
};

虽然在 gulp 构建期间我仍然收到一些警告:

WARNING in ./~/paper/dist/paper-node.js
require.extensions is not supported by webpack. Use a loader instead.

WARNING in ./~/paper/dist/paper-node.js
Critical dependencies:
12263:19-26 require function is used in a way in which dependencies cannot be statically extracted
 @ ./~/paper/dist/paper-node.js 12263:19-26

WARNING in ./~/paper/~/jsdom/~/acorn-globals/~/acorn/dist/walk.js
Critical dependencies:
1:503-510 This seems to be a pre-built javascript file. Though this is possible, it's not recommended. Try to require the original source to get better results.
 @ ./~/paper/~/jsdom/~/acorn-globals/~/acorn/dist/walk.js 1:503-510

WARNING in ./~/paper/~/jsdom/~/acorn-globals/~/acorn/dist/acorn.js
Critical dependencies:
1:478-485 This seems to be a pre-built javascript file. Though this is possible, it's not recommended. Try to require the original source to get better results.
 @ ./~/paper/~/jsdom/~/acorn-globals/~/acorn/dist/acorn.js 1:478-485

WARNING in ./~/paper/~/request/~/hawk/~/hoek/lib/index.js
Critical dependencies:
403:34-60 the request of a dependency is an expression
 @ ./~/paper/~/request/~/hawk/~/hoek/lib/index.js 403:34-60

此外，我在浏览器控制台中收到错误消息:

Uncaught Error: Cannot open /home/bojan/www/react/MyApp/node_modules/paper/node_modules/canvas/build/Release/canvas.node: TypeError: process.dlopen is not a function
    (anonymous function) @ canvas.node:1
    map../paper-core @ app.js:95332
    __webpack_require__ @ bootstrap 62fa91d09bcc96ef0556:19
    (anonymous function) @ bindings.js:2
    __webpack_require__ @ bootstrap 62fa91d09bcc96ef0556:19
    (anonymous function) @ canvas.js:12
    __webpack_require__ @ bootstrap 62fa91d09bcc96ef0556:19
    (anonymous function) @ paper-node.js:10243
    (anonymous function) @ paper-node.js:33
    (anonymous function) @ paper-node.js:12290
    __webpack_require__ @ bootstrap 62fa91d09bcc96ef0556:19
    (anonymous function) @ CbPaper.js:7
    Object.defineProperty.value @ CbPaper.js:146
    __webpack_require__ @ bootstrap 62fa91d09bcc96ef0556:19
    Object.defineProperty.value @ App.js:12
    __webpack_require__ @ bootstrap 62fa91d09bcc96ef0556:19
    exports.TYPES.INTEGER @ app.js:5
    __webpack_require__ @ bootstrap 62fa91d09bcc96ef0556:19
    obj.__esModule.default @ bootstrap 62fa91d09bcc96ef0556:39
    (anonymous function) @ bootstrap 62fa91d09bcc96ef0556:39

有什么想法吗？我对整个 webpack/node 生态系统还很陌生，所以我可能做错了什么。

Answer 1

构建在 npm 上的 PaperJS 是 paper-node，它是 PaperJS 的 NodeJS 版本。它依赖于 jsdom 和 node-canvas，它们在浏览器中不起作用。

恐怕你需要使用 bower 来检索客户端版本的 PaperJS，或者链接到 https://github.com/paperjs/paper.js 获取 paper 在你的 package.json 中的依赖。

"dependencies": {
  "paper": "paperjs/paper.js"
}

然后通过 require('paper/dist/paper-full') 请求 PaperJS。

正如@bebraw 指出的那样，您可以通过提供标签来选择特定版本的 PaperJS。查看Releases页。由于当前版本是 0.9.22，最后一个片段将变成:

"dependencies": {
  "paper": "paperjs/paper.js#v0.9.22"
}