fix: CommonJS build requires .cjs extension for ESM package (#56)

Author: wylieconlon

esbuild.cjs

@@ -24,7 +24,8 @@ Promise.all([
     entryPoints: ["src/browser.ts"],
     bundle: true,
     format: "cjs",
-    outdir: "dist/cjs",
+    // .cjs extension is required because "type": "module" is set in package.json
+    outfile: "dist/cjs/browser.cjs",
     platform: "browser",
     plugins: [browserifyPlugin],
   }),
@@ -47,7 +48,8 @@ Promise.all([
     bundle: true,
     format: "cjs",
     platform: "node",
-    outdir: "dist/cjs",
+    // .cjs extension is required because "type": "module" is set in package.json
+    outfile: "dist/cjs/index.cjs",
     plugins: [browserifyPlugin],
   }),
 
@@ -64,15 +66,16 @@ import { createRequire as topLevelCreateRequire } from 'module';
 const require = topLevelCreateRequire(import.meta.url);
       `.trim(),
     },
-    outdir: "dist/esm",
+    outfile: "dist/esm/index.js",
     plugins: [browserifyPlugin],
   }),
 
   // Edge:
   // CommonJS build
   esbuild.build({
     entryPoints: ["src/index.ts"],
-    outfile: "dist/cjs/index.edge.js",
+    // .cjs extension is required because "type": "module" is set in package.json
+    outfile: "dist/cjs/index.edge.cjs",
     bundle: true,
     format: "cjs",
     platform: "browser",

package-lock.json

@@ -20,8 +20,8 @@
       "types": "./dist/esm/index.d.ts",
       "edge-light": {
         "import": "./dist/esm/index.edge.js",
-        "require": "./dist/cjs/index.edge.js",
-        "default": "./dist/cjs/index.edge.js"
+        "require": "./dist/cjs/index.edge.cjs",
+        "default": "./dist/cjs/index.edge.cjs"
       },
       "worker": {
         "import": "./dist/esm/index.edge.js",
@@ -39,13 +39,14 @@
         "default": "./dist/cjs/index.edge.js"
       },
       "import": "./dist/esm/index.js",
-      "require": "./dist/cjs/index.js",
-      "default": "./dist/cjs/index.js"
+      "require": "./dist/cjs/index.cjs",
+      "default": "./dist/cjs/index.cjs"
     },
     "./browser": {
       "types": "./dist/esm/browser.d.ts",
       "import": "./dist/esm/browser.js",
-      "require": "./dist/cjs/browser.js"
+      "require": "./dist/cjs/browser.cjs",
+      "default": "./dist/cjs/browser.cjs"
     }
   },
   "types": "./dist/esm/index.d.ts",