After I create a sample react app using create-react-app, npm start fails.I have tried this using node 11.4 and 10.4 (npm 6.4.1)
I just created a new React application using this command: After installation, when I tried to open it using npm start and yarn start, I got the following error.
In the tutorial published by reactjs.org, it was stated that "Class components should always call the base constructor with props". In my own research, it seems that super(props) can be replaced by super() if this.props is not used in the constructors, according to this StackOverflow answer.
I know that state allows us to create components that are dynamic and interactive but I want to deep in state.
I was going through react library code. After going through I found a special piece of code I am unable to understand its significance. Can someone help?
My question is just same as the title. Let's say I wrote the following code.Now, after the last line, this code will export the TODOList component with the state as props. It's not that it contains state, but just received state and will have them as 'props', just like the...
I am trying to get Redux Form to work for the first time and I am getting the following error:Invariant Violation withRef is removed. To access the wrapped instance, use a ref on the connected component.
Assume I have a small component in a web application that represents an expander control, i.e. a header text, an icon to expand / collapse and some content.
i am trying to create a new react app using but i'm getting this error. i've used create-react-app before and this is the first time i'm encountering this
In this example, I have this react class:The question is if I can add React hooks to this. I understand that React-Hooks is alternative to React Class style. But if I wish to slowly migrate into React hooks, can I add useful hooks into Classes?