Problem
When upgrading my npm package dependencies, I encountered an error with the rollup upgrade:
npm install
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! Found: rollup@2.33.3
npm ERR! node_modules/rollup
npm ERR! dev rollup@"^2.12.1" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer rollup@">=0.66.0 <2" from rollup-plugin-uglify@6.0.4
npm ERR! node_modules/rollup-plugin-uglify
npm ERR! dev rollup-plugin-uglify@"^6.0.4" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
I discovered that rollup-plugin-uglify was no longer compatible with rollup 2 (see issue).
The recommendation was to replace rollup-plugin-uglify with rollup-plugin-terser.
Luckily, the process was straightforward.
Solution
Install rollup-plugin-terser and remove rollup-plugin-uglify:
npm i rollup-plugin-terser -D && npm rm rollup-plugin-uglify -D
Update rollup.config.js:
// rollup.config.js
-import { uglify } from 'rollup-plugin-uglify';
+import { terser } from 'rollup-plugin-terser';
const config = {
// ...
- plugins: [uglify()],
+ plugins: [terser()],
};
export default config;