toggle-ime.js

key.setEditKey("M-l",
               function (ev, arg) {
                   let elem = ev.originalTarget;

                   elem.style.imeMode = {
                       active   : "inactive",
                       inactive : "active"
                   }[elem.style.imeMode] || "active";

                   elem.blur();
                   elem.focus();
               }, "Toggle IME", true);