Found non-callable @@iterator in reactjs store

Question

TypeError: Found non-callable @@iterator

const  middelware ={thunk};
 const Store = createStore(
      rootReducer,initialState, compose(
          applyMiddleware(...middelware),
           window.devToolsExtension ? window.devToolsExtension() : f=> f

const  middelware ={thunk};
 const Store = createStore(
      rootReducer,initialState, compose(
          applyMiddleware(...middelware),
           window.devToolsExtension ? window.devToolsExtension() : f=> f

Answer 1

大概middleware是一个对象而不是一个数组，所以在这里或其他地方，你正在做等价的：

applyMiddleware(...{})

而不是：

applyMiddleware(...[])

在函数调用中传播参数只能用数组或其他类似的可迭代对象来完成。