Error on build

[sophyphreak]

ERROR in index.bundle.js from UglifyJs
Unexpected character '`' [./node_modules/round-to/index.js:17,0][index.bundle.js:65,88303]
Child html-webpack-plugin for "index.html":
     1 asset
    [./node_modules/html-webpack-plugin/lib/loader.js!./public/index.html] ./node_modules/html-webpack-plugin/lib/loader.js!./public/index.html 363 bytes {0} [built]
Child extract-text-webpack-plugin node_modules/extract-text-webpack-plugin/dist node_modules/css-loader/index.js!node_modules/sass-loader/lib/loader.js!scss/style.scss:
    [./node_modules/css-loader/index.js!./node_modules/sass-loader/lib/loader.js!./scss/style.scss] ./node_modules/css-loader!./node_modules/sass-loader/lib/loader.js!./scss/style.scss 126 kB {0} [built]

[SamVerschueren]

We aim for Node.js, not the browser. You can find a more detailed explanation here sindresorhus/ama#446.

If you use Webpack, check out babel-engine-plugin, which transpiles only the dependencies that needs to be transpiled.