Index: cfe/trunk/lib/Format/TokenAnnotator.cpp
===================================================================
--- cfe/trunk/lib/Format/TokenAnnotator.cpp
+++ cfe/trunk/lib/Format/TokenAnnotator.cpp
@@ -2526,11 +2526,10 @@
       return true;
   } else if (Style.Language == FormatStyle::LK_JavaScript) {
     const FormatToken *NonComment = Right.getPreviousNonComment();
-    if (Left.isOneOf(tok::kw_return, tok::kw_continue, tok::kw_break,
-                     tok::kw_throw) ||
-        (NonComment &&
-         NonComment->isOneOf(tok::kw_return, tok::kw_continue, tok::kw_break,
-                             tok::kw_throw)))
+    if (NonComment &&
+        NonComment->isOneOf(tok::kw_return, tok::kw_continue, tok::kw_break,
+                            tok::kw_throw, Keywords.kw_interface,
+                            Keywords.kw_type))
       return false; // Otherwise a semicolon is inserted.
     if (Left.is(TT_JsFatArrow) && Right.is(tok::l_brace))
       return false;
Index: cfe/trunk/unittests/Format/FormatTestJS.cpp
===================================================================
--- cfe/trunk/unittests/Format/FormatTestJS.cpp
+++ cfe/trunk/unittests/Format/FormatTestJS.cpp
@@ -1228,6 +1228,20 @@
                "class C {}");
 }
 
+TEST_F(FormatTestJS, TypeInterfaceLineWrapping) {
+  const FormatStyle &Style = getGoogleJSStyleWithColumns(20);
+  verifyFormat("type LongTypeIsReallyUnreasonablyLong =\n"
+               "    string;\n",
+               "type LongTypeIsReallyUnreasonablyLong = string;\n",
+               Style);
+  verifyFormat(
+      "interface AbstractStrategyFactoryProvider {\n"
+      "  a: number\n"
+      "}\n",
+      "interface AbstractStrategyFactoryProvider { a: number }\n",
+      Style);
+}
+
 TEST_F(FormatTestJS, Modules) {
   verifyFormat("import SomeThing from 'some/module.js';");
   verifyFormat("import {X, Y} from 'some/module.js';");