From 18969b024d45287d421e32736dc91511723b72be Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Tue, 4 Oct 2016 16:29:51 -0700
Subject: [PATCH] Handle the require call in javascript file for
 getSymbolAtLocation This helps in getting the alias symbol so that it can go
 to the definition of external module Fixes #9251

---
 src/compiler/checker.ts                             |  3 +++
 tests/cases/fourslash/goToDefinitionJsModuleName.ts | 11 +++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 tests/cases/fourslash/goToDefinitionJsModuleName.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 422f2a70dcc..29f2a874926 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -18436,6 +18436,9 @@ namespace ts {
                             (<ImportDeclaration>node.parent).moduleSpecifier === node)) {
                         return resolveExternalModuleName(node, <LiteralExpression>node);
                     }
+                    if (isInJavaScriptFile(node) && isRequireCall(node.parent, /*checkArgumentIsStringLiteral*/ false)) {
+                        return resolveExternalModuleName(node, <LiteralExpression>node);
+                    }
                 // Fall through
 
                 case SyntaxKind.NumericLiteral:
diff --git a/tests/cases/fourslash/goToDefinitionJsModuleName.ts b/tests/cases/fourslash/goToDefinitionJsModuleName.ts
new file mode 100644
index 00000000000..1480aa2c5a1
--- /dev/null
+++ b/tests/cases/fourslash/goToDefinitionJsModuleName.ts
@@ -0,0 +1,11 @@
+/// <reference path='fourslash.ts'/>
+
+// @allowJs: true
+// @Filename: foo.js
+/////*2*/module.exports = {};
+
+// @Filename: bar.js
+////var x = require(/*1*/"./foo");
+
+debugger;
+verify.goToDefinition("1", "2");