fix: implement standard-things#877

package.json

@@ -3,9 +3,9 @@
   "version": "3.2.25",
   "description": "Tomorrow's ECMAScript modules today!",
   "keywords": "commonjs, ecmascript, export, import, modules, node, require",
-  "repository": "standard-things/esm",
+  "repository": "irls/esm",
   "license": "MIT",
-  "author": "John-David Dalton <[email protected]>",
+  "author": "irls",
   "main": "esm.js",
   "private": true,
   "runkitExample": "require = require(\"esm\")(module)\nrequire(\"lodash-es\")",

src/module.js

@@ -27,6 +27,7 @@ import staticResolveFilename from "./module/static/resolve-filename.js"
 import staticResolveLookupPaths from "./module/static/resolve-lookup-paths.js"
 import staticWrap from "./module/static/wrap.js"
 import staticWrapper from "./module/static/wrapper.js"
+import jsFileLoader from "./shim/module-js-file-loader"
 
 const {
   ELECTRON
@@ -51,6 +52,10 @@ const Module = maskFunction(function (id = "", parent) {
   }
 }, RealModule)
 
+// Patch the loader for files with .js extension to prevent default
+// behaviour of erroring on commonjs syntax in dependencies.
+RealModule._extensions[".js"] = jsFileLoader
+
 Module._cache = __non_webpack_require__.cache
 Module._extensions = { __proto__: null }
 Module._findPath = staticFindPath

src/shim/module-js-file-loader.js

@@ -0,0 +1,8 @@
+import { readFileSync } from "fs"
+
+function jsFileLoader(module, filename) {
+  const content = readFileSync(filename, "utf8")
+  module._compile(content, filename)
+}
+
+export default jsFileLoader