StackEditでvim/emacsキーバインド設定 ref: http://qiita.com/blueplanet/items/da836ad23889c2877cc8

file0.js

userCustom.onReady = function() {
    var ace = {}
    ace.require = require
    ace.define = define
    ace.require(["ace/lib/net"], function(acenet) {
        acenet.loadScript("//cdn.jsdelivr.net/ace/1.1.01/min/keybinding-vim.js", function() {
            e = document.querySelector(".ace_editor").env.editor
            ace.require(["ace/keyboard/vim"], function(acevim) {
                e.setKeyboardHandler(acevim.handler);
            });
        });
    });
    window.ace = ace;
};