Installed webpack, babel, styleguidist and ends up throwing error when built

[umakantp]

Current behaviour

Styleguidist breaks with showing es6 or typescript files as not parsable and breaks. I have no file in my broken yet, just webpack, babel, styleguidist and bare minimum config for styleguidist.

To reproduce

1. git clone https://github.com/umakantp/styleguidist-broken
2. npm install
3. npm run build

Error seen on screen

> styleguidist-broken@1.0.0 build
> styleguidist build

Building style guide...
 FAIL  Failed to compile

node_modules/markdown-to-jsx/index.js from Terser plugin
Unexpected token: operator (<) [node_modules/markdown-to-jsx/index.js:779,21]
node_modules/tiny-warning/src/index.js from Terser plugin
Missing initializer in const declaration [node_modules/tiny-warning/src/index.js:2,18]
node_modules/@babel/helpers/scripts/generate-regenerator-runtime.js from Terser plugin
Unexpected token: name (Promise) [node_modules/@babel/helpers/scripts/generate-regenerator-runtime.js:6,32]
node_modules/@babel/plugin-proposal-private-property-in-object/lib/index.js from Terser plugin
'return' outside of function [node_modules/@babel/plugin-proposal-private-property-in-object/lib/index.js:25,2]
node_modules/@webassemblyjs/helper-numbers/src/index.js from Terser plugin
Unexpected token punc «:», expected punc «,» [node_modules/@webassemblyjs/helper-numbers/src/index.js:7,37]
node_modules/@webassemblyjs/ieee754/src/index.js from Terser plugin
Unexpected token punc «:», expected punc «,» [node_modules/@webassemblyjs/ieee754/src/index.js:21,27]
node_modules/has-symbols/test/shams/core-js.js from Terser plugin
'return' outside of function [node_modules/has-symbols/test/shams/core-js.js:11,1]
node_modules/has-symbols/test/shams/get-own-property-symbols.js from Terser plugin
'return' outside of function [node_modules/has-symbols/test/shams/get-own-property-symbols.js:11,1]
node_modules/jss/src/flow-types/cssom.js from Terser plugin
Unexpected token: name (StylePropertyMap) [node_modules/jss/src/flow-types/cssom.js:5,17]
node_modules/jss/src/flow-types/dom.js from Terser plugin
Unexpected token: name (DOMString) [node_modules/jss/src/flow-types/dom.js:5,12]
node_modules/jss/src/flow-types/jss.js from Terser plugin
Unexpected token name «Jss», expected name «from» [node_modules/jss/src/flow-types/jss.js:2,12]
node_modules/istanbul-reports/lib/html-spa/src/fileBreadcrumbs.js from Terser plugin
Unexpected token: operator (<) [node_modules/istanbul-reports/lib/html-spa/src/fileBreadcrumbs.js:20,12]
node_modules/istanbul-reports/lib/html-spa/src/flattenToggle.js from Terser plugin
Unexpected token: operator (<) [node_modules/istanbul-reports/lib/html-spa/src/flattenToggle.js:5,8]
node_modules/istanbul-reports/lib/html-spa/src/filterToggle.js from Terser plugin
Unexpected token: operator (<) [node_modules/istanbul-reports/lib/html-spa/src/filterToggle.js:5,8]
node_modules/istanbul-reports/lib/html-spa/src/index.js from Terser plugin
Unexpected token: operator (<) [node_modules/istanbul-reports/lib/html-spa/src/index.js:93,8]
node_modules/istanbul-reports/lib/html-spa/src/summaryHeader.js from Terser plugin
Unexpected token: operator (<) [node_modules/istanbul-reports/lib/html-spa/src/summaryHeader.js:26,8]
node_modules/istanbul-reports/lib/html-spa/src/summaryTableHeader.js from Terser plugin
Unexpected token: operator (<) [node_modules/istanbul-reports/lib/html-spa/src/summaryTableHeader.js:27,8]
node_modules/istanbul-reports/lib/html-spa/src/summaryTableLine.js from Terser plugin
Unexpected token: operator (<) [node_modules/istanbul-reports/lib/html-spa/src/summaryTableLine.js:7,8]

Expected behavior

It should create, build and generate a minimum style guide based on config.

Notes
I feel this issue could be due to Webpack not being configured properly. It works as expected when we do npm run start i.e. server. But fails on the building part.

[umakantp]

I added a verbose flag and as I said, it could be Webpack config. I get following details:

Loading components:

clean-webpack-plugin: pausing due to webpack errors
 FAIL  Failed to compile

node_modules/markdown-to-jsx/index.js from Terser plugin
Unexpected token: operator (<) [node_modules/markdown-to-jsx/index.js:779,21]
    at js_error (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:549:11)
    at croak (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:1273:9)
    at token_error (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:1281:9)
    at unexpected (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:1287:9)
    at expr_atom (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:2563:9)
    at maybe_unary (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:3421:19)
    at expr_ops (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:3472:24)
    at maybe_conditional (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:3477:20)
    at maybe_assign (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:3554:20)
    at expression (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:3589:24)
node_modules/tiny-warning/src/index.js from Terser plugin
Missing initializer in const declaration [node_modules/tiny-warning/src/index.js:2,18]
    at js_error (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:549:11)
    at croak (/Users/user/projects/styleguidist/node_modules/terser/dist/bundle.min.js:1273:9)

[umakantp]

More info to add. Interestingly minimize: false in the config, fixes the problem