From 67d975de9cbe13591289dc55a0a263e6b0410f3c Mon Sep 17 00:00:00 2001
From: Rob Figueiredo <robfig@yext.com>
Date: Wed, 14 Aug 2019 19:59:00 -0400
Subject: [PATCH] JsChecker: support extensionless ES6 imports

---
 java/com/google/javascript/jscomp/CheckStrictDeps.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/java/com/google/javascript/jscomp/CheckStrictDeps.java b/java/com/google/javascript/jscomp/CheckStrictDeps.java
index 70109ddbc2..ed3de2e4b8 100644
--- a/java/com/google/javascript/jscomp/CheckStrictDeps.java
+++ b/java/com/google/javascript/jscomp/CheckStrictDeps.java
@@ -136,6 +136,12 @@ private void visitEs6Import(NodeTraversal t, Node n) {
     private void checkNamespaceIsProvided(NodeTraversal t, Node n, String namespace) {
       if (namespace.startsWith("/") || namespace.startsWith(".")) {
         // TODO(jart): Unify path resolution with ModuleLoader.
+        // NOTE(robfig): To enable usage of extensionless ES6 modules,
+        // copy these 3 lines from NodeModuleResolver.java.
+        if (!namespace.endsWith(".js")) {
+          namespace += ".js";
+        }
+
         Webpath me = Webpath.get(t.getSourceName());
         if (!me.isAbsolute()) {
           me = Webpath.get("/").resolve(me);