react-and-redux | & quot ; In-depth explanation of React and Redux & quot ; code | Frontend Framework library

Following this tutorial I am stepping into odd errors in the very first steps.

After running:

I am writing a calculator app as a project for FreeCodeCamp. I have decided to write it using React and Redux. I've written the Redux part of the app, and I started to connect Redux to React.

When I wrote all the code to connect Redux to my React app, the rendering stopped working. I used different console.log() statements to track down where the JavaScript was choking, and I narrowed it down to the connect statement found on line 241 of the linked Codepen. If you comment out line 242, and replace line 255 with ReactDOM.render(, wrapper); the app renders. However, the same code running on FreeCodeCamp's platform appears to work.

Here is the link to my CodePen: JavaScript Calculator.

The challenge I used on FreeCodeCamp to test my code can be found here: FCC Challenge

The exact code I adapted from FCC (in order to get the editor to render my component) is below. You can see the changes I made from the Pen are only in the rendering part of the code.

I'm new to redux, dont know where i'm going wrong. Do i need change the whole code into props? if i have to change the respective code into props then how to take those inputs which i've taken states {}? Could you please help me on this?

I have gone through this link "Pass data between independent component react and redux" but it have only one input and here i have multiple components.

First Component:

I would like to learn Server side rendering and while searching in google,i've seen many topics about a framwork called nextjs,and after trying it,i found it pretty good.SO now i would take a serious course on SSR,but after a search on Udemy I've found a course which is rated 4.7/5 of Stephen Grider,but in the course content i've not seen next.js.Here is the course link : Server Side Rendering with React and Redux.

I don't have much experience with SSR,but it seems that there are two ways to make it:With React,redux,node/express or Next.js. When i've tried next.js,i've not used react-router but in the description of the courses of udemy,the instructor talks about using react router. I really need your advices before i learn it seriously,and i need to know the best solution between the 2 approches.

I implemented a simple Login Form in React with Redux following this tutorial: https://jslancer.com/blog/2017/04/27/a-simple-login-flow-with-react-and-redux/

Everything works, but when I add cookies I get the error:

Warning: Cannot update during an existing state transition (such as within render). Render methods should be a pure function of props and state.

and also:

Uncaught Invariant Violation: Maximum update depth exceeded. This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate. React limits the number of nested updates to prevent infinite loops.

I did some debugging and if I remove onChange={e => this.setState({password: e.target.value})} from the inputs in the code below the error disappears.

Any ideas why the following code is not working?

I'm a beginner in React & Redux and I am confused with manipulating the state in Reducers. In most of the articles, documentations, I keep seeing that the states are immutable and we should never update the state. We should always use ...state or object.assign in the reducers

However, in famous tutorials (Cory House or other places (Eg. Here on GitHub) , they update the state the directly like the following:

I am following a blog post, attempting to get a user login implemented in my app

https://auth0.com/blog/secure-your-react-and-redux-app-with-jwt-authentication/

It recommends doing the following in my action

Halfway through a React tutorial series and getting an error at the end of mapStateToProps. My code is the same as in the tutorial as far as I can tell.

In Command Line:

I'm working on a project with Typescript, React and Redux (all running in Electron), and I've run into a problem when I'm including one class based component in another and trying to pass parameters between them. Loosely speaking, I've got the following structure for the container component: