Doesn't work.

[joeyhub]

npm install rollup-plugin-analyzer
import analyzerPlugin from 'rollup-plugin-analyzer';
analyzerPlugin();
(node:9194) UnhandledPromiseRejectionWarning: TypeError: analyzerPlugin is not a function

[doesdev]

It may be that your example isn't reflective of your actual usage, but assuming it is then you'll need to make some changes.

Since this is a plugin for rollup you will need to call it within the plugins array of the rollup options.

Like so:

import { rollup } from 'rollup'
import analyze from 'rollup-plugin-analyzer'

rollup({
  entry: 'main.js',
  plugins: [analyze()]
}).then(...)

If that is how you're using it and it isn't working please let me know. I'll close this for now though.

[joeyhub]

# (node --version;npm install rollup-plugin-analyzer;echo 'import analyzerPlugin from "rollup-plugin-analyzer";analyzerPlugin();' > test.mjs;node --experimental-modules test.mjs)
v12.10.0
+ rollup-plugin-analyzer@3.1.2
(node:9412) ExperimentalWarning: The ESM module loader is experimental.
file:///beancount/test.mjs:1
import analyzerPlugin from "rollup-plugin-analyzer";analyzerPlugin();
                                                    ^

TypeError: analyzerPlugin is not a function
    at file:///beancount/test.mjs:1:53
    at ModuleJob.run (internal/modules/esm/module_job.js:111:37)
    at async Loader.import (internal/modules/esm/loader.js:137:24)

Other plugins work. It's just this one.

[joeyhub]

You plugin is structured differently to others so it can't import somehow.

Even the module.js wont parse (since not mjs or some other convention)...

export const reporter = (analysis, opts) => {
^^^^^^

SyntaxError: Unexpected token export

[joeyhub]

Other modules seem to follow a fairly consistent pattern of including a dist along with src.

Then in the dist...

"main": "dist/rollup-plugin-commonjs.cjs.js",
"module": "dist/rollup-plugin-commonjs.es.js",

Though some also just use module for what's in src and then put a legacy cjs in dist.

I still don't see why it doesn't work as you have these two fields in your package.json.

Renaming it to mjs worked. There's probably something weird in your package.json.

[doesdev]

It complies with Node's specifications, but ESM support is still pretty unstable in Node so I guess it working only with the mjs extension is a reflection of that.

All the same the core problem isn't extension and was rather a bad export signature on my part. Just released 3.2.0 which corrects that.

[joeyhub]

It works with module.exports instead of exports.