在TodoDispatcher.js中，會爆TypeError: TodoDispatcher.regeist is not a function錯誤，要怎麼解決呢

Question

import {Dispatcher} from 'flux';//引用storeimport Store from '../stores/TodoStore';const TodoDispatcher=new Dispatcher();TodoDispatcher.regeist(function(action){    switch (action.actionType) {        case "ADD_TODO":            Store.addTodoData(action.payload);            Store.emitChange();            //調用store            break;            default:            //其他            break;    }})導出默認TodoDispatcher;