[!] (plugin rename-rollup) SyntaxError: Unexpected token (8:12)

[luckylooke]

Hello,
first of all, thank you for sharing.
I am trying to remake my ui library from git submodule to npm package, I dicided to use rollup and I am trying to implement this setup. BUT I end on this issue:

rollup --config ./rollup.config.js --watch
rollup v1.32.1
bundles ./src/index.js → dist...
[!] (plugin rename-rollup) SyntaxError: Unexpected token (8:12)
undefined (8:12)
SyntaxError: Unexpected token (8:12)
    at Object.pp$4.raise (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:2840:15)
    at Object.pp.unexpected (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:689:10)
    at Object.pp$3.parseIdent (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:2791:12)
    at Object.pp$3.parsePropertyName (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:2597:107)
    at Object.pp$3.parseProperty (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:2524:10)
    at Object.pp$3.parseObj (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:2478:23)
    at Object.pp$3.parseExprAtom (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:2239:19)
    at Object.parseExprAtom (myProject/node_modules/rollup/dist/shared/node-entry.js:11811:30)
    at Object.pp$3.parseExprSubscripts (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:2092:21)
    at Object.pp$3.parseMaybeUnary (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:2069:19)
    at Object.pp$3.parseExprOps (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:2013:21)
    at Object.pp$3.parseMaybeConditional (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:1996:21)
    at Object.pp$3.parseMaybeAssign (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:1969:21)
    at Object.pp$3.parseExpression (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:1935:21)
    at Object.pp$1.parseReturnStatement (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:1005:33)
    at Object.pp$1.parseStatement (myProject/node_modules/rollup/node_modules/acorn/dist/acorn.js:835:37)

Could anybody give me some hint please? Thanks :)

[luckylooke]

This PR seems to be related: #5

[aarongranick-okta]

Are you using ES6 classes? Acorn cannot parse class fields. '@babel/plugin-proposal-class-properties may help