Context Counter Example - React Typing CST Test
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Context Counter Example — React Code
Shares counter state across components using React Context.
import React, { createContext, useContext, useState } from 'react';
const CounterContext = createContext();
export const useCounter = () => useContext(CounterContext);
const CounterProvider = ({ children }) => {
const [count, setCount] = useState(0);
return <CounterContext.Provider value={{ count, setCount }}>{children}</CounterContext.Provider>;
};
export default CounterProvider;React Language Guide
React is a declarative, component-based JavaScript library for building user interfaces, primarily for single-page applications. It allows developers to create reusable UI components and manage application state efficiently.
Primary Use Cases
- ▸Single-page web applications (SPAs)
- ▸Dynamic user interfaces for web apps
- ▸Mobile apps via React Native
- ▸Reusable component libraries
- ▸Interactive dashboards and admin panels
Notable Features
- ▸Component-based architecture
- ▸Virtual DOM for optimized rendering
- ▸JSX syntax for combining HTML and JS
- ▸One-way data binding (props)
- ▸Hooks for state and lifecycle management
Origin & Creator
Developed by Jordan Walke at Facebook in 2013.
Industrial Note
React is specialized for building dynamic, responsive web and mobile UIs, particularly in SPA and complex front-end applications.