javascript – Yarn Workspaces和Browserify – 子文件夹中的package.json会破坏构建

我的最终目标是在使用browserify和Babel 7的项目中使用Yarn Workspaces.这是我所遇到的问题的最小复制.基本上似乎在子文件夹中存在一个package.json文件(这是你使用Yarn Workspaces时所拥有的东西之一)会破坏我的browserify构建,我无法弄清楚原因.

Here’s a GitHub repo with a minimal reproduction of the problem.

首先,安装依赖项(你可以使用yarn或npm,无所谓)：

$npm install

然后确认browserify Babel构建工作：

$npm run build

> browserify-babelify-yarn-workspaces@1.0.0 build /home/user/projects/browserify-babelify-yarn-workspaces
> browserify a/index.js -t babelify --outfile bundle.js

好的,一切都很好！我编译的代码在bundle.js中.

现在让我们在一个文件夹中创建一个虚拟的package.json：

$echo "{}" > a/package.json

这不应该改变构建,对吗？错误：

$npm run build

> browserify-babelify-yarn-workspaces@1.0.0 build /home/user/projects/browserify-babelify-yarn-workspaces
> browserify a/index.js -t babelify --outfile bundle.js


/home/user/projects/browserify-babelify-yarn-workspaces/a/index.js:1
import lib from "./lib.js";
^
ParseError: 'import' and 'export' may appear only with 'sourceType: module'
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! browserify-babelify-yarn-workspaces@1.0.0 build: `browserify a/index.js -t babelify --outfile bundle.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the browserify-babelify-yarn-workspaces@1.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/user/.npm/_logs/2018-11-16T15_58_43_540Z-debug.log

我无法弄清楚为什么会这样.任何帮助,将不胜感激！

解决方法

我认为我的问题实际上是在Babel文档中描述的. https://babeljs.io/docs/en/config-files#monorepos说解决方案是使用babel.config.js文件而不是.babelrc文件.删除.babelrc并将其放入babel.config.js似乎确实有效：

module.exports = function (api) {
  api.cache(true);

  const presets = ["@babel/preset-env"];
  const plugins = [];

  return {
    presets,plugins
  };
}