redux | 易学教程

Updating nested data in redux store

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问题 What's the best/correct way to update a nested array of data in a store using redux? My store looks like this: { items:{ 1: { id: 1, key: "value", links: [ { id: 10001 data: "some more stuff" }, ... ] }, ... } } I have a pair of asynchronous actions that updates the complete items object but I have another pair of actions that I want to update a specific links array. My reducer currently looks like this but I'm not sure if this is the correct approach: switch (action.type) { case RESOURCE

Why use Redux over Facebook Flux? [closed]

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问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 8 months ago . Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. I've read this answer, reducing boilerplate, looked at few GitHub examples and even tried redux a

redux+react-redux+示例的快速上手体验

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本文主要记录下自己在react道路上的爬坑过程以及对于刚学习redux的同学提供一些可供参考的例子。之前用vue用了很久 vue的语法糖用起来是真的舒服不过现在公司项目用的是react 只好默默的从vue转到react 其实毕竟他们都是类似的框架，虽然语法大不同，但是有些地方的思想还是很像的，废话不多说了，开始正文... 本文主要分为两个部分：redux和react-redux。首先大概过一下redux的基础部分： 1.redux 要知道redux和react并没有半毛钱的关系，redux甚至可以和jq一起用。 react-redux才是react的用于便捷操作redux的第三方插件。所以呢，学习react-redux之前我们要比较熟悉的了解redux的思想。本文比较直接，不来虚的，直接上代码：首先就很熟悉了 1 使用官方脚手架 create-react-app redux-demo 2 环境搭建好之后继续安装redux npm install redux --S 进入到项目文件夹把我们用不到的全咔咔删掉在src/index.js里引入redux并创建action reducer和store src/index.js： import React from 'react'; import ReactDOM from 'react-dom'; import App

剥开比原看代码17：比原是如何显示交易的详细信息的？

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 作者：freewind 比原项目仓库： Github地址： https://github.com/Bytom/bytom Gitee地址： https://gitee.com/BytomBlockchain/bytom 在上上篇文章里，我们还剩下一个小问题没有解决，即前端是如何显示一个交易的详细信息的。先看对应的图片：这个图片由于太长，分成了两个，实际上可以看作一个。那么这个页面是怎么来的呢？这是在前面以列表的方式显示交易摘要信息后，可以点击摘要信息右上角的“查看详情”链接打开。那我们在本文看一下，比原是如何显示这个交易的详细信息的。由于它分成了前后两端，那么我们跟以前一样，把它再分成两个小问题：前端是怎么向后台发送请求，并显示数据的后端是如何拿到相应的数据发送给前台的需要说明的是，这个表格中包含了很多信息，但是我们在本文并不打算去解释。因为能看懂的一看就能明白，看不懂的就需要准确的了解了比原的核心之后才能解释清楚，而这一块等到我们晚点再专门研究。前端是怎么向后台发送请求，并显示数据的首先我们看一下显示交易详细信息页面的路由path是多少。当我们把鼠标放在交易摘要页面右上角的“查看详情”时，会发现url类似于： http://localhost:9888/dashboard

Using Flow union types for Redux actions

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问题 Following the style of this Facebook app sample using Redux and Flow together, I made an action type in this manner: type Action = | { type: 'ADD_FILES', files: Array<{ id: number, file: File }> } | { type: 'HANDLE_IMAGE_PUBLISHED', id: number, name: string } | { type: 'SET_IMAGE_UPLOAD_PROGRESS', id: number, progress: number } ; But I've found that when I try to process my actions with a reducer, Flow complains if I try to access the name or progress properties, saying "Property not found in

Load Data Asynchronously not working using redux-form

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问题 I am trying to load data to form asynchronously using redux-form v6.7.0, but it is not working. I referred this link. Below is my sample code. Any help would be appreciated. Thanks in advance. /* reducers should always maintain immutability */ var personInfo = { name: "", age: "" }; function PersonInfoReducer(state = personInfo, action) { switch (action.type) { case "SAVE_PERSON_DATA": return Object.assign({}, state, action.payload); default: return state; } } /* save person data action */

How do I filter an array of data by id or name using another array of data to display in React Table?

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问题 I have a role-template array that gives each role a name , and a description . It also has a nested object with an array of permissions that are identified by id . { "data": [ { "id": "1", "type": "role-templates", "attributes": { "name": "Org Admin" }, "relationships": { "permissions": { "data": [ { "type": "permissions", "id": "1" }, { "type": "permissions", "id": "2" }, { "type": "permissions", "id": "3" }, { "type": "permissions", "id": "4" }, { "type": "permissions", "id": "5" }, { "type

redux form Element type is invalid: expected a string (for built-in components)

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问题 In my stepper code Iam trying to include the radio button. When I include the radio button I am getting the below error. I looked into this example https://redux-form.com/6.0.0-alpha.6/examples/simple/ and then imeplemented but still I am faccing errors. Can you tell me how to fix it, so that in future I will fix it myself. Providing my sandbox and code snippet below. https://codesandbox.io/s/0prxxxvy0n Element type is invalid: expected a string (for built-in components) or a class/function

Running into a 'resizeListeners' of undefined with react and Semantic-UI accordion

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问题 I am using Semantic-UI accordion for the Segment react component that is wrapped around an eCharts line plot (using echarts-for-react). I currently have a button that allows me to collapse the line plot, as seen in the "collapsed" variable. I also have a button that allows me to change the size of the component from half screen to full screen. The problem is when the component is already "collapsed" and I trigger the resize from half screen to full screen then "uncollapse" the component, the

How to to cancel pending asynchronous actions in React/Redux

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问题 Consider the following situation: When user navigates to page, two asynchronous Redux actions are dispatched to fetch two sets of related data parallel. If either of these fetches fails, it will be detected by the component, which will render error component on next cycle, which in turn dispatches clearState action when mounting. However, the other action is still to be resolved/rejected and will spoil the clean state. Objective is to interrupt this (and preferably many other) pending