Homepage: https://emacswiki.org/emacs/download/ecmascript-mode.el
Author: David Lindquist
Updated:
Major mode for editing ECMAScript code
ecmascript-mode is a basic major mode for editing code conforming to the ECMA-262 standard (3rd edition). The most notable languages employing all or most of the standard are JavaScript (Netscape), JScript (Microsoft), and ActionScript (Macromedia). See also: http://www.ecma-international.org/publications/files/ecma-st/ECMA-262.pdf