Update esm loader hooks API

package.json

@@ -69,7 +69,8 @@
     "test-local": "npm run lint-fix && npm run build-tsc && npm run build-pack && npm run test-spec --",
     "coverage-report": "nyc report --reporter=lcov",
     "prepare": "npm run clean && npm run build-nopack",
-    "api-extractor": "api-extractor run --local --verbose"
+    "api-extractor": "api-extractor run --local --verbose",
+    "esm-usage-example": "npm run build-tsc && cd esm-usage-example && node --experimental-specifier-resolution node --loader ../esm.mjs ./index"
   },
   "engines": {
     "node": ">=12.0.0"

src/esm.ts

@@ -28,7 +28,8 @@ export function registerAndCreateEsmHooks(opts?: RegisterOptions) {
     preferTsExts: tsNodeInstance.options.preferTsExts,
   });
 
-  return { resolve, getFormat, transformSource };
+  // return { resolve, getFormat, transformSource };
+  return { resolve, load };
 
   function isFileUrlOrNodeStyleSpecifier(parsed: UrlWithStringQuery) {
     // We only understand file:// URLs, but in node, the specifier can be a node-style `./foo` or `foo`
@@ -65,11 +66,23 @@ export function registerAndCreateEsmHooks(opts?: RegisterOptions) {
 
     // pathname is the path to be resolved
 
-    return nodeResolveImplementation.defaultResolve(
+    console.log('got here');
+
+    const x = nodeResolveImplementation.defaultResolve(
       specifier,
       context,
       defaultResolve
     );
+    console.log('x', x);
+    return x;
+  }
+
+  async function load(
+    url: string,
+    context: {},
+    defaultLoad: typeof load
+  ): Promise<{ format: Format }> {
+    throw new Error('load');
   }
 
   type Format = 'builtin' | 'commonjs' | 'dynamic' | 'json' | 'module' | 'wasm';