From 1470a7c404aa2f524eaf0f9e366c0b0e8a8ef599 Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Thu, 10 Jan 2019 15:18:02 -0800
Subject: [PATCH] Fix typo

---
 src/compiler/core.ts    | 2 +-
 src/compiler/tsbuild.ts | 2 +-
 src/compiler/watch.ts   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 17f6c6f4fc3..74ac9e93047 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -1391,7 +1391,7 @@ namespace ts {
         return result;
     }
 
-    export function copyProperities<T1 extends T2, T2>(first: T1, second: T2) {
+    export function copyProperties<T1 extends T2, T2>(first: T1, second: T2) {
         for (const id in second) {
             if (hasOwnProperty.call(second, id)) {
                 (first as any)[id] = second[id];
diff --git a/src/compiler/tsbuild.ts b/src/compiler/tsbuild.ts
index fa84b4bd9bb..8c1c93eeb0b 100644
--- a/src/compiler/tsbuild.ts
+++ b/src/compiler/tsbuild.ts
@@ -393,7 +393,7 @@ namespace ts {
     export function createSolutionBuilderWithWatchHost<T extends BuilderProgram = SemanticDiagnosticsBuilderProgram>(system = sys, createProgram?: CreateProgram<T>, reportDiagnostic?: DiagnosticReporter, reportSolutionBuilderStatus?: DiagnosticReporter, reportWatchStatus?: WatchStatusReporter) {
         const host = createSolutionBuilderHostBase(system, createProgram || createEmitAndSemanticDiagnosticsBuilderProgram as any as CreateProgram<T>, reportDiagnostic, reportSolutionBuilderStatus) as SolutionBuilderWithWatchHost<T>;
         const watchHost = createWatchHost(system, reportWatchStatus);
-        copyProperities(host, watchHost);
+        copyProperties(host, watchHost);
         return host;
     }
 
diff --git a/src/compiler/watch.ts b/src/compiler/watch.ts
index cc6d1236fed..b92289635d3 100644
--- a/src/compiler/watch.ts
+++ b/src/compiler/watch.ts
@@ -317,7 +317,7 @@ namespace ts {
     function createWatchCompilerHost<T extends BuilderProgram = EmitAndSemanticDiagnosticsBuilderProgram>(system = sys, createProgram: CreateProgram<T> | undefined, reportDiagnostic: DiagnosticReporter, reportWatchStatus?: WatchStatusReporter): WatchCompilerHost<T> {
         const writeFileName = (s: string) => system.write(s + system.newLine);
         const result = createProgramHost(system, createProgram || createEmitAndSemanticDiagnosticsBuilderProgram as any as CreateProgram<T>) as WatchCompilerHost<T>;
-        copyProperities(result, createWatchHost(system, reportWatchStatus));
+        copyProperties(result, createWatchHost(system, reportWatchStatus));
         result.afterProgramCreate = builderProgram => {
             const compilerOptions = builderProgram.getCompilerOptions();
             const newLine = getNewLineCharacter(compilerOptions, () => system.newLine);