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What is Reactjs?

React (also known as React.js or ReactJS) is a free and open-source front-end JavaScript library for building user interfaces based on UI components. It is maintained by Meta (formerly Facebook) and a community of individual developers and companies. React can be used as a base in the development of single-page, mobile, or server-rendered applications with frameworks like Next.js. However, React is only concerned with state management and rendering that state to the DOM, so creating React applications usually requires the use of additional libraries for routing, as well as certain client-side functionality.

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Questions (44)

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Javascript - Value of variable gets lost outside a try-catch statement in a react component?

Explanation This is because the const only has context within the try block. If you want this to be accessible outside the block you need to declare it before the block and set it accordingly. Solutio...

Tags: Javascript, Reactjs

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Reactjs - Is there a way to solve the combination between routes that affect each other?

The two routers are rendered at the same time and so also render any matched routes at the same time. You only need one router per React application. Refactor the code so App renders the single necess...

Tags: Reactjs, typescript, react-router-dom

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Reactjs - Enforcing same imported component name as the file it is imported from in react ts modules imports?

You are looking for eslint-plugin-filenames. Considering your project is using typescript, here is how you can use eslint for the same: Install the dependencies: npm i eslint --save-dev npm i eslint-p...

Tags: Reactjs

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Javascript - Getting an error if arrow function returns a function but not when it returns null for useEffect?

The problem is that by changing to the shorthand form, you've implicitly added a return. Your shorthand version isn't the same as your version with {}; instead, it's equivalent to this: useEffect(() =...

Tags: Javascript, Reactjs, react-hooks

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Reactjs - NextJS (AppRouter), Apollo (Client), error on using ApolloProvider in root layout?

If you want to use Apollo Client with the App Router, you have to use it with the @apollo/experimental-nextjs-app-support library. The App Router is based on a React Canary release that cannot be dire...

Tags: Reactjs, next.js, graphql

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Javascript - Routing not correct in MERN, following a YouTube Video and downloaded the source code?

Taking a quick look in the source repo, it looks like it attempts to set the Axios baseURL using axios.defaults.baseURL = import.meta.env.VITE_API_BASE_URL; but there's no such value in the .env file...

Tags: Javascript, Reactjs, mongodb

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Python - How to post and get value from react native into flask?

You declare saveData() function inside useEffect, which means the function is accessible only in the scope of that function. I can see that you pass this function as argument on row 76:...

Tags: python, Reactjs, react-native

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Javascript - axios interceptor issue react redux and node?

You issue is,the userData within the scope of this interceptor will not automatically update when you fetch new tokens because it's set outside of the interceptor function. This can lead to the old to...

Tags: Javascript, Reactjs, axios

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Javascript - React shopify checkout extension, add link into text dynamically?

React will escape plain strings that are rendered, however you can render an array of React content. So, instead of adding your link as text, create an array containing the start of the string, then y...

Tags: Javascript, Reactjs, shopify

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Javascript - How to handle the states when disabling my component in react?

You can try this. #create new variable to set the disabled value; const [isDisabled, setIsDisabled] = useState(payStub ? true : false); #Then create a onblur function const handleBlur = (e) => {...

Tags: Javascript, Reactjs, react-hooks

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