specify babel plugins separately

lib/src/transpiler/babel.ts

@@ -1,5 +1,5 @@
 import { SourceMap } from "./map.ts";
-import { transform, availablePresets } from "@babel/standalone";
+import { transform, availablePlugins } from "@babel/standalone";
 
 export default function babel(next: Compiler): Compiler {
 	print("Loaded babel!");
@@ -8,7 +8,63 @@ export default function babel(next: Compiler): Compiler {
 		const res = transform(code, {
 			filename,
 			sourceMaps: true,
-			presets: [availablePresets.env],
+			assumptions: {
+				arrayLikeIsIterable: true,
+				constantSuper: true,
+				ignoreFunctionLength: true,
+				ignoreToPrimitiveHint: true,
+				mutableTemplateObject: true,
+				noDocumentAll: true,
+				noNewArrows: true,
+				noUninitializedPrivateFieldAccess: true,
+				privateFieldsAsSymbols: true,
+			},
+			plugins: [
+				// ES2022
+				availablePlugins["transform-class-properties"],
+				availablePlugins["transform-class-static-block"],
+				availablePlugins["transform-private-methods"],
+				availablePlugins["transform-private-property-in-object"],
+				// "syntax-top-level-await",
+			
+				// ES2021
+				availablePlugins["transform-logical-assignment-operators"],
+				availablePlugins["transform-numeric-separator"],
+			
+				// ES2020
+				availablePlugins["transform-optional-chaining"],
+				availablePlugins["transform-nullish-coalescing-operator"],
+			
+				// ES2018
+				availablePlugins["transform-async-generator-functions"],
+				availablePlugins["transform-object-rest-spread"],
+				availablePlugins["transform-unicode-property-regex"],
+			
+				// ES2017
+				availablePlugins["transform-async-to-generator"],
+			
+				// ES2016
+				availablePlugins["transform-exponentiation-operator"],
+			
+				// ES2015
+				availablePlugins["transform-block-scoping"],
+				availablePlugins["transform-classes"],
+				availablePlugins["transform-computed-properties"],
+				availablePlugins["transform-destructuring"],
+				availablePlugins["transform-duplicate-keys"],
+				availablePlugins["transform-for-of"],
+				availablePlugins["transform-function-name"],
+				availablePlugins["transform-literals"],
+				availablePlugins["transform-new-target"],
+				availablePlugins["transform-object-super"],
+				availablePlugins["transform-parameters"],
+				availablePlugins["transform-shorthand-properties"],
+				availablePlugins["transform-spread"],
+				availablePlugins["transform-sticky-regex"],
+				availablePlugins["transform-template-literals"],
+				availablePlugins["transform-unicode-escapes"],
+				availablePlugins["transform-unicode-regex"],
+			],
 		});
 
 		const map = SourceMap.parse({
@@ -18,7 +74,9 @@ export default function babel(next: Compiler): Compiler {
 		});
 
 		registerSource(filename, code);
-		return next("babel-internal://" + filename, res.code!, SourceMap.chain(map, prevMap));
+		const func = next("babel-internal://" + filename, res.code!, SourceMap.chain(map, prevMap));
+		func.name = filename;
+		return func;
 	};
 }
 

lib/src/transpiler/coffeescript.ts

@@ -21,7 +21,9 @@ export default function coffee(next: Compiler): Compiler {
 		});
 
 		registerSource(filename, code);
-		return next("coffee-internal://" + filename, result, SourceMap.chain(map, prevMap));
+		const func = next("coffee-internal://" + filename, result, SourceMap.chain(map, prevMap));
+		func.name = filename;
+		return func;
 	};
 }