Error: Actions must be plain objects. Use custom middleware for async actions.

原本代码：

import { SREACH_FOCUS, SREACH_BLUR } from "./actionType"
export const searchFocus = () => { 
    type: SREACH_FOCUS
}
export const search_blur = () => { 
    type: SREACH_BLUR
}

改正后：

import { SREACH_FOCUS, SREACH_BLUR } from "./actionType"
export const searchFocus = () => ({
    type: SREACH_FOCUS
})
export const search_blur = () => ({
    type: SREACH_BLUR
})

区别

=>{}和=>({})

原因

Error: Actions must be plain objects. Use custom middleware for async actions.

原文：https://www.cnblogs.com/lceihen/p/14393640.html