Read Babel's res.externalDependencies

parcel-bundler · Jun 19, 2022 · 4d3f2af · 4d3f2af
1 parent 8c2ffaf
commit 4d3f2af
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/flow-libs/babel-core.js.flow b/flow-libs/babel-core.js.flow
@@ -74,7 +74,7 @@ declare module "@babel/core" {
     getModuleId?: (name: string) => string,
     moduleRoot?: string,
   |};
-  declare type Result = {| code: string, map: ?SourceMap, ast: File |};
+  declare type Result = {| code: string, map: ?SourceMap, ast: File, externalDependencies: Set<string> |};
 
   declare export function transform(
     code: string,

diff --git a/packages/transformers/babel/src/babel7.js b/packages/transformers/babel/src/babel7.js
@@ -82,6 +82,11 @@ export default async function babel7(
         remapAstLocations(babelCore.types, res.ast, map);
       }
     }
+    if (res.externalDependencies) {
+      for (let f of res.externalDependencies) {
+        asset.invalidateOnFileChange(f);
+      }
+    }
   }
 
   if (res.ast) {