flux | 易学教程

How to fire periodic actions using setTimeout and dispatcher in redux

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问题 How/Where can I dispatch actions periodically? Using recursive setTimeout to make a countdown. Taken from the example, something similar to this: // Can also be async if you return a function export function incrementAsync() { return dispatch => { (function _r() { setTimeout(() => { // Yay! Can invoke sync or async actions with `dispatch` dispatch(increment()); _r(); }, 1000); })(); }; } So is this a good idea, or there is a better approach to this problem, like using middlewares or creating

react-router : run is not a function

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问题 A Egghead tutorial teaches it like this: var React = require('react'); var Router = require('react-router'); var routes = require('./config/routes'); Router.run(routes, function(Root){ React.render(<Root />, document.getElementById('app')); }); Yet I get this error: Uncaught TypeError: Router.run is not a function note: I've already updated react-router to the recent version. 回答1: Since the release of React Router v1.0, the run method has been removed, these breaking changes are documented in

MVC vs. Flux ? Bidirectional vs. Unidirectional?

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问题 Looking at the following diagram (which explains MVC), I see unidirectional data flow. So why do we consider MVC to have bidirectional data flow while justifying Flux ? 回答1: Because in Javascript frameworks the MVC does not work the way you depicted. The UI generally communicates bi-directionally with the model, as in: User types into View input MVC framework binds onchange() to update a model. Ajax request brings in new model data. MVC framework updates View input's value to match model. In

Flux Dispatch.dispatch(…): Cannot dispatch in the middle of a dispatch

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My code https://gist.github.com/ButuzGOL/707d1605f63eef55e4af So when I get sign-in success callback I want to make redirect, redirect works through dispatcher too. And I am getting Dispatch.dispatch(...): Cannot dispatch in the middle of a dispatch. Is there any hack to call action in the middle ? I don't see where in the gist that you posted you are doing the redirect. I only see the AUTH_SIGNIN and AUTH_SIGNIN_SUCCESS actions, and they look pretty straightforward. But no, there is no hack to create an action in the middle of a dispatch, and this is by design. Actions are not supposed to be

React.js - Communicating between sibling components

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I'm new to React, and I'd like to ask a strategy question about how best to accomplish a task where data must be communicated between sibling components. First, I'll describe the task: Say I have multiple <select> components that are children of a single parent that passes down the select boxes dynamically, composed from an array. Each box has exactly the same available options in its initial state, but once a user selects a particular option in one box, it must be disabled as an option in all other boxes until it is released. Here's an example of the same in (silly) code. (I'm using react

Flux: waitFor specific event

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问题 I'm trying to understand how to resolve dependencies among stores. The problem is I have a comprehensive data tree, which need to be fetched from server with the chain of request that depends one on another. PROBLEM: waitFor seams not to be supposed for async requests. Suppose next event chain: NEED_A (look at StoreA ) NEED_B (look at StoreB ) Here StoreB do AppDispatcher.waitFor([StoreA.dispatchToken]) . But actually we want to wait for GET_A SOME_OTHER_ACTION (look at StoreA ) The third

How can I persist redux state tree on refresh?

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The first principal of Redux documentation is: The state of your whole application is stored in an object tree within a single store. And I actually thought that I understand all of principals well. But I'm now confused what does application means. If application means just one of little complicated part in website and works in just one page, I understand. But what if application means whole website? Should I use LocalStorage or cookie or something for keep the state tree? but what if browser doesn't support LocalStorage? I want to know how developers keep their state tree! :) If you would

How to download fetch response in react as file

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问题 Here is the code in actions.js export function exportRecordToExcel(record) { return ({fetch}) => ({ type: EXPORT_RECORD_TO_EXCEL, payload: { promise: fetch('/records/export', { credentials: 'same-origin', method: 'post', headers: {'Content-Type': 'application/json'}, body: JSON.stringify(data) }).then(function(response) { return response; }) } }); } The returned response is an .xlsx file. I want the user to be able to save it as a file, but nothing happens. I assume the server is returning

Spring 5 响应式编程

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要点 Reactor 是一个运行在 Java8 之上的响应式流框架，它提供了一组响应式风格的 API 除了个别 API 上的区别，它的原理跟 RxJava 很相似它是第四代响应式框架，支持操作融合，类似 RxJava 2 Spring 5 的响应式编程模型主要依赖 Reactor RxJava 回顾 Reactor 是第四代响应式框架，跟RxJava 2 有些相似。Reactor 项目由Pivotal 启动，以响应式流规范、Java8 和ReactiveX 术语表为基础。它的设计是Reactor 2（上一个主要版本）和RxJava 核心贡献者共同努力的结果。在之前的同系列文章 RxJava 实例解析和测试RxJava 里，我们已经了解了响应式编程的基础：数据流的概念、Observable 类和它的各种操作以及通过工厂方法创建静态和动态的Observable 对象。 Observable 是事件的源头，Observer 提供了一组简单的接口，并通过订阅事件源来消费 Observable 的事件。Observable 通过 onNext 向 Observer 通知事件的到达，后面可能会跟上 onError 或 onComplete 来表示事件的结束。 RxJava 提供了 TestSubscriber 来测试 Observable，TestSubscriber 是一个特别的

flux架构的详细介绍和使用！

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结构分为四个视图 view 动作 action 派发器 dispatcher 数据商店 store 流程: 用户操作视图视图(view)发送动作(action)到派发器(dispatcher) 由派发器(dispatcher) 对动作类型(action.type)做判断然后调用数据商店(store)的相应方法来操作数据模型(store.state) 最后由数据商店(store)通知视图(view)进行更新在完整的案例中 action只是起到传递数据的作用本质就是一个对象而已 action最好用专门的工厂函数来进行创建(actions) 在视图中通过调用action工厂函数来生产aciton 再由工厂函数将action发送给派发器同时在开发时应将视图部分进行拆分拆分成 : 容器组件和UI组件 UI组件纯粹负责显示数据容器组件负责处理业务逻辑由容器组件提供更新视图的方法然后在组件加载完成时将更新视图方法提供给store store应将其绑定到更新视图专用的事件上例如: let EventEmiiter = require("events").EventEmiiter let store = { ...EventEmiiter.prototype, subscribe(cb){ this.on("update",cb) }, setUsername(name

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