Learn Java and Programming through articles, code examples, and tutorials for developers of all levels.
How to use Context and useReducer for state management in React app? Example Tutorial
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Hello friends, we are here again today for another exciting topic to discuss. But, today we are not gonna discuss something which is related to Java or any other language or spring boot. Today we are gonna discuss something which is immensely practical and has the potential to land you very high paying jobs.
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Introduction
Before the React hooks were introduced, it was not possible to use state in functional components. The React hooks transformed stateless functional components into stateful components in which state and lifecycle methods like functionality could be used.
The useState hook is the primary hook for declaring the state in a functional component. Using it, a state variable can be declared and initialized along with a function to manipulate it. But sometimes state gets complex and the useState hook is not efficient to handle it.
So React provides another hook for complex state management in functional components. This hook is called useReducer. In this article, we will discuss what useReducer hook is and how to use it.
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[Solved] java.lang.ClassNotFoundException: org.Springframework.Web.Context.ContextLoaderListener in Java and Spring
Context.ContextLoaderListener in your Spring-based Java Web application.
Cause: This error comes when you are using the Spring MVC framework in your Java Web application and configured org.springframework.web.context.ContextLoaderListener as a listener in your deployment descriptor also known as web.xml, but the JAR which contains this class is not available in the web application's CLASSPATH.