From 48d60694ad5d6014b8664f515e698651f55c9e5f Mon Sep 17 00:00:00 2001
From: Westbrook Johnson <wesjohns@adobe.com>
Date: Fri, 13 Nov 2020 12:24:51 -0500
Subject: [PATCH] fix(overlay): use isolatedModules in tsconfig

---
 packages/overlay/src/popper.ts | 7 ++++---
 tsconfig.json                  | 1 +
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/packages/overlay/src/popper.ts b/packages/overlay/src/popper.ts
index 7d58c5fa2d..90c1c987c8 100644
--- a/packages/overlay/src/popper.ts
+++ b/packages/overlay/src/popper.ts
@@ -17,8 +17,8 @@ import {
     popperGenerator,
     defaultModifiers,
 } from '@popperjs/core/lib/popper-lite';
-import { Instance } from '@popperjs/core/lib/types';
-import { Placement } from '@popperjs/core/lib/enums';
+import type { Instance } from '@popperjs/core/lib/types';
+import type { Placement } from '@popperjs/core/lib/enums';
 
 import flip from '@popperjs/core/lib/modifiers/flip.js';
 import preventOverflow from '@popperjs/core/lib/modifiers/preventOverflow.js';
@@ -39,4 +39,5 @@ export const createPopper = popperGenerator({
     ],
 });
 
-export { Instance, Placement, maxSize, applyMaxSize };
+export type { Instance, Placement };
+export { maxSize, applyMaxSize };
diff --git a/tsconfig.json b/tsconfig.json
index 6e19fab25f..47ce49ff17 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,6 +6,7 @@
         "experimentalDecorators": true,
         "importHelpers": true,
         "inlineSources": true,
+        "isolatedModules": true,
         "lib": ["es2017", "dom", "dom.iterable"],
         "module": "esNext",
         "moduleResolution": "node",