use conditional exports pattern

auth.js

@@ -1,7 +1,7 @@
 
 import * as Y from 'yjs' // eslint-disable-line
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
+import * as encoding from 'lib0/encoding'
+import * as decoding from 'lib0/decoding'
 
 export const messagePermissionDenied = 0
 

awareness.js

@@ -2,12 +2,12 @@
  * @module awareness-protocol
  */
 
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-import * as time from 'lib0/time.js'
-import * as math from 'lib0/math.js'
-import { Observable } from 'lib0/observable.js'
-import * as f from 'lib0/function.js'
+import * as encoding from 'lib0/encoding'
+import * as decoding from 'lib0/decoding'
+import * as time from 'lib0/time'
+import * as math from 'lib0/math'
+import { Observable } from 'lib0/observable'
+import * as f from 'lib0/function'
 import * as Y from 'yjs' // eslint-disable-line
 
 export const outdatedTimeout = 30000

awareness.test.js

@@ -1,7 +1,7 @@
 
 import * as Y from 'yjs'
-import * as t from 'lib0/testing.js'
-import * as awareness from './awareness.js'
+import * as t from 'lib0/testing'
+import * as awareness from './awareness'
 
 /**
  * @param {t.TestCase} tc

package.json

@@ -42,17 +42,38 @@
     "url": "https://github.com/yjs/y-protocols/issues"
   },
   "homepage": "https://github.com/yjs/y-protocols#readme",
+  "exports": {
+    "./package.json": "./package.json",
+    "./sync.js": "./sync.js",
+    "./dist/sync.cjs": "./dist/sync.cjs",
+    "./sync": {
+      "import": "./sync.js",
+      "require": "./dist/sync.cjs"
+    },
+    "./awareness.js": "./awareness.js",
+    "./dist/awareness.cjs": "./dist/awareness.cjs",
+    "./awareness": {
+      "import": "./awareness.js",
+      "require": "./dist/awareness.cjs"
+    },
+    "./auth.js": "./auth.js",
+    "./dist/auth.cjs": "./dist/auth.cjs",
+    "./auth": {
+      "import": "./auth.js",
+      "require": "./dist/auth.cjs"
+    }
+  },
   "dependencies": {
-    "lib0": "^0.2.35"
+    "lib0": "^0.2.42"
   },
   "devDependencies": {
-    "@rollup/plugin-commonjs": "^17.0.0",
-    "@rollup/plugin-node-resolve": "^11.0.1",
+    "@rollup/plugin-commonjs": "^17.1.0",
+    "@rollup/plugin-node-resolve": "^11.2.1",
     "concurrently": "^5.3.0",
-    "rollup": "^2.30.0",
+    "rollup": "^2.48.0",
     "standard": "^12.0.1",
-    "typescript": "^4.1.3",
-    "yjs": "^13.4.9"
+    "typescript": "^4.2.4",
+    "yjs": "^13.5.6"
   },
   "peerDependenies": {
     "yjs": "^13.0.0"

rollup.config.js

@@ -24,7 +24,7 @@ export default [{
     chunkFileNames: '[name]-[hash].cjs',
     paths: /** @param {any} path */ path => {
       if (/^lib0\//.test(path)) {
-        return `lib0/dist/${path.slice(5, -3) + '.cjs'}`
+        return `lib0/dist/${path.slice(5) + '.cjs'}`
       }
       return path
     }

sync.js

@@ -2,8 +2,8 @@
  * @module sync-protocol
  */
 
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
+import * as encoding from 'lib0/encoding'
+import * as decoding from 'lib0/decoding'
 import * as Y from 'yjs'
 
 /**

test.js

@@ -1,8 +1,8 @@
-import { runTests } from 'lib0/testing.js'
-import * as log from 'lib0/logging.js'
+import { runTests } from 'lib0/testing'
+import * as log from 'lib0/logging'
 import * as awareness from './awareness.test.js'
 
-import { isBrowser, isNode } from 'lib0/environment.js'
+import { isBrowser, isNode } from 'lib0/environment'
 
 /* istanbul ignore if */
 if (isBrowser) {