commit d3b729f1f2f15c60fe66f3765ff4d24be52e385e
Author: Tom Tromey <tom@tromey.com>
Date:   Thu Feb 23 23:57:59 2017 -0700

    add "async" and "await" keywords
    
    * lisp/progmodes/js.el (js--keyword-re): Add async, await.

diff --git a/lisp/progmodes/js.el b/lisp/progmodes/js.el
index b42b2bc..6e313dc 100644
--- a/lisp/progmodes/js.el
+++ b/lisp/progmodes/js.el
@@ -277,7 +277,7 @@ js--regexp-opt-symbol
 
 (defconst js--keyword-re
   (js--regexp-opt-symbol
-   '("abstract" "break" "case" "catch" "class" "const"
+   '("abstract" "async" "await" "break" "case" "catch" "class" "const"
      "continue" "debugger" "default" "delete" "do" "else"
      "enum" "export" "extends" "final" "finally" "for"
      "function" "goto" "if" "implements" "import" "in"