Object.assign didn't return a function

[ericelliott]

In exercise-builder the build is throwing errors at the Webpack step. Not sure what's causing it:

$ node --version
v0.12.5
$ npm --version
2.11.2

> exercise-builder@1.0.2 build /Users/eric/dev/exercise-builder
> NODE_ENV=production webpack && npm run build:min && npm run build:doc

Hash: d9f2eead3307d16f76f3
Version: webpack 1.11.0
Time: 498ms
    + 1 hidden modules

ERROR in Loader /Users/eric/dev/exercise-builder/node_modules/babel/index.js?plugins=object-assign didn't return a function

[SpaceK33z]

You don't have babel-loader installed, install it with npm install babel-loader --save-dev.

[shama]

@ericelliott Did @SpaceK33z suggestion fix your issue?

[ericelliott]

No. I have babel-loader installed, now, but I still get this error:

ERROR in ./source/index.js
Module build failed: ReferenceError: Unknown plugin "object-assign"
    at PluginManager.subnormaliseString (/Users/eric/Dropbox/dev/exercise-builder/node_modules/babel-loader/node_modules/babel-core/lib/transformation/file/plugin-manager.js:147:13)
    at PluginManager.add (/Users/eric/Dropbox/dev/exercise-builder/node_modules/babel-loader/node_modules/babel-core/lib/transformation/file/plugin-manager.js:190:40)
    at File.buildTransformers (/Users/eric/Dropbox/dev/exercise-builder/node_modules/babel-loader/node_modules/babel-core/lib/transformation/file/index.js:237:21)
    at new File (/Users/eric/Dropbox/dev/exercise-builder/node_modules/babel-loader/node_modules/babel-core/lib/transformation/file/index.js:139:10)
    at Pipeline.transform (/Users/eric/Dropbox/dev/exercise-builder/node_modules/babel-loader/node_modules/babel-core/lib/transformation/pipeline.js:164:16)
    at transpile (/Users/eric/Dropbox/dev/exercise-builder/node_modules/babel-loader/index.js:12:22)
    at Object.module.exports (/Users/eric/Dropbox/dev/exercise-builder/node_modules/babel-loader/index.js:69:12)

[ericelliott]

See the webpack build error branch.

[shama]

Try this instead: npm i babel-plugin-object-assign --save-dev
and update your webpack config to:

loaders: ['babel?plugins=babel-plugin-object-assign'],

[shama]

Related to this issue (where I found the above solution): https://github.com/babel-plugins/babel-plugin-object-assign/issues/1

[ghost]

You should add exclude: /node_modules/ to your webpack.config.js like:

module: {
loaders: [
{ test: /.js[x]?$/,
exclude: /node_modules/, //to avoid 'ReferenceError: Unknown plugin "object-assign"'
loaders:['babel-loader']
...

So you probably might not need to use the object-assign plugin

[bebraw]

I see you ended up with loaders: ['babel?plugins=object-assign'] kind of declaration. Closing.