Set isNewIdentifierLocation to true for JavaScript files

Author: jramsay

src/services/services.ts

@@ -4247,7 +4247,7 @@ namespace ts {
                 addRange(entries, keywordCompletions);
             }
 
-            return { isMemberCompletion, isNewIdentifierLocation, entries };
+            return { isMemberCompletion, isNewIdentifierLocation: isSourceFileJavaScript(sourceFile) ? true : isNewIdentifierLocation, entries };
 
             function getJavaScriptCompletionEntries(sourceFile: SourceFile, position: number, uniqueNames: Map<string>): CompletionEntry[] {
                 const entries: CompletionEntry[] = [];