Make REPL use Babel 8 to simplify import map (#209)

repl/importmap.js

@@ -27,21 +27,12 @@ const reactMin = {
 const imports = {
   "@runtime-type-inspector/runtime"   : '../src-runtime/index.js',
   "@runtime-type-inspector/transpiler": '../src-transpiler/index.js',
-  "@babel/parser"                     : importFile(`
-    // Note: this is still ugly, but Babel 8 should be "nice" ESM (when it's out)
-    // Test: const {parse} = await import("@babel/parser");
-    // Now we have this, but requires never npm version:
-    // https://github.com/kungfooman/babel-8-via-importmap/blob/main/importmap.js
-    globalThis.exports = {};
-    const ret = await import("${nodeModules}@babel/parser/lib/index.js");
-    export const {parse, parseExpression, tokTypes} = globalThis.exports;
-    export default exports;
-  `),
-  "display-anything"                  : "./node_modules/display-anything/src/index.js",
-  "worker-with-import-map"            : "./node_modules/worker-with-import-map/src/index.js",
-  "test-import-validation-b"          : "../test/typechecking/import-validation/b.js",
-  //"@babel/helper-plugin-utils"      : "./babel-helper-plugin-utils.js",
-  //"@babel/plugin-syntax-typescript" : "./babel-plugin-syntax-typescript.js",
+  "@babel/parser"                     : nodeModules + '@babel/parser/lib/index.js',
+  "display-anything"                  : nodeModules + 'display-anything/src/index.js',
+  "worker-with-import-map"            : nodeModules + 'worker-with-import-map/src/index.js',
+  "test-import-validation-b"          : '../test/typechecking/import-validation/b.js',
+  //"@babel/helper-plugin-utils"      : './babel-helper-plugin-utils.js',
+  //"@babel/plugin-syntax-typescript" : './babel-plugin-syntax-typescript.js',
   "fs"                                : importFile("export default {};"),
   "typescript"                        : importFile(`
     globalThis.module = {exports: {}};

repl/package.json

@@ -9,6 +9,7 @@
     "access": "public"
   },
   "dependencies": {
+    "@babel/parser": "^8.0.0-alpha.12",
     "@runtime-type-inspector/transpiler": "^4.0.0",
     "ace-builds": "^1.35.2",
     "display-anything": "^1.1.0",