0
所以,我检查了终极版的代码库,终极版增强和applyMiddleware
要创建一个店,我们称之为由终极版曝光的createStore功能,
createStore(ourReducer,{}, applyMiddleware(someMiddleware));
export default function createStore(reducer, preloadedState, enhancer) {
if (typeof preloadedState === 'function' && typeof enhancer === 'undefined') {
enhancer = preloadedState
preloadedState = undefined
}
if (typeof enhancer !== 'undefined') {
if (typeof enhancer !== 'function') {
throw new Error('Expected the enhancer to be a function.')
}
return enhancer(createStore)(reducer, preloadedState)
} ...
在createStore以上功能,增强被称为在这一部分,这也是我在第一行通过applyMiddleware功能...
enhancer(createStore)(reducer, preloadedState)
但是,当我检查了applyMiddleware功能,有3个参数 (减速机,preloadedState,增强剂)...
export default function applyMiddleware(...middlewares) {
return (createStore) => (reducer, preloadedState, enhancer) => {
...
它基本上总是不确定的吧?我只是好奇为什么它在那里,或者我错过了什么。
enhancer(createStore)(reducer, preloadedState)