Three dots (...) error in postcss-icss-parser.js

Question

I do npm build and after im get error:

ERROR in .../PublishingFilter.css (./node_modules/css-loader/dist/cjs.js!./src/shared/publishingFilter/PublishingFilter.css)
    Module build failed (from ./node_modules/css-loader/dist/cjs.js):
    .../node_modules/css-loader/dist/plugins/postcss-icss-parser.js:34
          accumulator[normalizedUrl] = { ...accumulator[normalizedUrl],

node v6.17.1

npm v3.10.10

Answer 1

Solution
If you cant upgrade your node version to 8, you just need set the version strictly before 3.3.1 of css-loader.

{
  "css-loader": "3.3.0",
}

Problem
Three dots is a spread operator from es6 which is supported by Node from v8.3. (Node v6 failing on object spread)

Сause
ccs-loader broke backward compatibility of node versions in patch release 3.3.1 on December 10
releases - https://github.com/webpack-contrib/css-loader/releases
problem commit - https://github.com/webpack-contrib/css-loader/pull/1014/files