react-gradual-upgrade-demo VS react-calendar

I've run into a weird issue when trying to gradually upgrade. If you don't know, React Gradual upgrade is a fun process where you require three package.json's - one in the root directory, one in src/legacy and one in src/modern. Refer to here for more info: GitHub I am getting the errors after running npm start ("webpack-dev-server --hot"):

The event listeners get cleaned up by the GC. At least in modern browsers.

While events aren’t explicitly mentioned, MDN offers an insightful read:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Memo...

Alternately, one can use event delegation [0]. As does React under the hood [1].

0 - https://javascript.info/event-delegation

1 - https://reactjs.org/blog/2020/08/10/react-v17-rc.html#change...

React 17 Release Candidate came out. Shortly after, an issue has been raised in Enzyme repository to add support for React 17. Immediately after, @layershifter has opened a PR adding an official enzyme-adapter-react-17.

Yes, the React core team discussed that in their blog post on the release candidate of v.17, and advised those who really need synchronous cleanup to use the useLayoutEffect.

React 17 included quite a bit of that work. Most of the event system was simplified/rewritten, pooling was removed, and delegation moved to the root.

Is it possible to do the reverse of the demo? - https://github.com/reactjs/react-gradual-upgrade-demo/

See https://github.com/reactjs/react-gradual-upgrade-demo

You can take a look at a demo of gradual updates on an example repository put together by the React team.

Checkout the demo for gradual upgrade.

3. React Calendar

I want to use a Calendar to schedule appointments for my final project. I was using https://www.npmjs.com/package/react-calendar However, I am unable to choose the hour when using this. I also have a hard time disabling the days when an appointment is already scheduled.

npm install react-calendar but I have no idea how to style it, or to give it some color. The instructions in react-calendar - npm do not provide any information about that. I was wondering if anyone that has used this package could help me here. This is the code I have:

You want this React-Calendar

That seems simple enough to do the MVP with vanilla JS (or jQuery if you really want), but if you go the React route you could leverage packages like React calendar or date pickers for booking that could make your life a lot easier. It’ll also be easier to scale once started since you’ll probably want to use some framework after your MVP is built anyway.

Now, here's the thing. I'm the maintainer of many popular React packages, React-PDF, React-Calendar, and React-Date-Picker just to name a few. Professionally, I maintain several large projects, which collectively have more than 30,000 Enzyme-based unit tests.

I was looking for a calendar to use in a React project and found the React-Calendar component. It has all the functionality that I was looking for and saves me a lot of time from building it out on my own. It can be controlled with state so that the selected date(s) can affect what displays in the app. I wanted to customize its styling to fit my project, so here's what I came up with!