Function funarg

static/editor.md/lib/codemirror/mode/javascript/javascript.js:539–542

(type)

    if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, statement, popcontext);
  }
  function funarg(type) {
    if (type == "spread") return cont(funarg);
    return pass(pattern, maybetype);
  }
  function className(type, value) {
    if (type == "variable") {register(value); return cont(classNameAfter);}
  }