markerikson

// Example of using multiple / nested `createEntityAdapter` calls within a single Redux Toolkit slice

interface Message {
  id: string;
  roomId: string;
  text: string;
  timestamp: string;
  username: string;
}

markerikson

Questions

Company

• company location / remote?
• what project management method?
• good and bad company culture?
• performance reviews?
• what's the path to profitability?

markerikson

Cheng Lou - On the Spectrum of Abstraction

Cheng Lou, a former member of the React team, gave an incredible talk at React Europe 2016 entitled "On the Spectrum of Abstraction". That talk is available for viewing here: https://www.youtube.com/watch?v=mVVNJKv9esE

It's only a half-hour, but it is mind-blowing. It's worth re-watching two or three times, to let the ideas sink in.

I just rewatched the talk for some research, and wrote down a summary that's semi-transcript-ish. I didn't see any other transcripts for this talk, other than the auto-generated closed captions, so I wanted to share for reference.

Summary

markerikson

// The classic AJAX call - dispatch before the request, and after it comes back
function myThunkActionCreator(someValue) {
    return (dispatch, getState) => {
        dispatch({type : "REQUEST_STARTED"});
        
        myAjaxLib.post("/someEndpoint", {data : someValue})
            .then(
                response => dispatch({type : "REQUEST_SUCCEEDED", payload : response}),
                error => dispatch({type : "REQUEST_FAILED", error : error})
            );    

markerikson

// approach 1: define action object in the component
this.props.dispatch({
    type : "EDIT_ITEM_ATTRIBUTES", 
    payload : {
        item : {itemID, itemType},
        newAttributes : newValue,
    }
});

// approach 2: use an action creator function

markerikson

class ParentComponent extends Component {
    constructor() {
        super();
        
        this.state = {
            data : [
                {id : 1, date : "2014-04-18", total : 121.0, status : "Shipped", name : "A", points: 5, percent : 50},
                {id : 2, date : "2014-04-21", total : 121.0, status : "Not Shipped", name : "B", points: 10, percent: 60},
                {id : 3, date : "2014-08-09", total : 121.0, status : "Not Shipped", name : "C", points: 15, percent: 70},
                {id : 4, date : "2014-04-24", total : 121.0, status : "Shipped", name : "D", points: 20, percent : 80},

markerikson

const createMySocketMiddleware = (url) => {
    return storeAPI => {
        let socket = createMyWebsocket(url);

        socket.on("message", (message) => {
            storeAPI.dispatch({
                type : "SOCKET_MESSAGE_RECEIVED",
                payload : message
            });
        });

markerikson

import {action1, action2} from "myActions";
import {bindActionCreators} from "redux";
import {connect} from "react-redux";

const mapStateToProps = (state, ownProps) = {
    return {
        counter : state.counter,
        someComponentValue : state.things[ownProps.someIdProp]        
    };
}

markerikson

Learn with Jason, 2024-01-04: What's New in Redux Toolkit 2.0?

• Migration Guides
  • Migrating to RTK 2.0
  • Migrating to Modern Redux
  • Setup with Next.js
• Release Notes
  • RTK: https://github.com/reduxjs/redux-toolkit/releases/tag/v2.0.0
  • Redux core: https://github.com/reduxjs/redux/releases/tag/v5.0.0
• Yes, createStore is still deprecated! https://redux.js.org/usage/migrations/migrating-rtk-2#createstore-deprecation

markerikson

// See https://blog.isquaredsoftware.com/presentations/react-redux-ts-intro-2020-12/#/36 for slides
// My basic render function structure:
function RenderLogicExample({
  someBoolean, // 1) Destructure values from `props` object
  someList,
}) {
  // 2) Declare state values
  const [a, setA] = useState(0);
  const [b, setB] = useState(0);