react
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ExpressJS
Fix “Blocked by CORS Policy” in a MERN App (React + Express)
The browser blocks your React app from reading the API response because Express did not send the right CORS headers. Install the cors package and add app.use(cors({ origin: "http://localhost:5173" })) before your routes. If you send cookies, also set credentials: true on the server and credentials: "include" (or withCredentials in Axios) on the client, and never use origin "*" with credentials.
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Frontend
React SEO: Titles and Meta Tags With React 19, React Helmet and Next.js
In React 19 you can render , and tags inside any component and React moves them into the document head. On older React versions, use react-helmet-async (the maintained successor of React Helmet). For pages that must rank in search, render them on the server or pre-render them, because metadata set only in the browser is a weaker signal.
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Frontend
The JavaScript For React Cheatsheet
Optimize web application performance: code splitting, lazy loading, caching, and measuring Core Web Vitals in 2026.
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Frontend
Exploring the React Compiler: A Detailed Introduction
Master advanced React Router v6 techniques for client-side navigation, lazy loading, and dynamic routing. Complete guide with code examples.
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Frontend
Why React Remains the Best Choice for Developers
# React Best Practices 2026 ## Table of Contents – Introduction – Core Concepts – Implementation Guide – Best Practices – Common Pitfalls – FAQ – Conclusion ##…
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Frontend
Creating Custom Hooks in React for Reusability and Clean Code
Introduction Table of Contents Understanding Custom Hooks Why Do We Need Custom Hooks? Benefits of Custom Hooks Creating Your First Custom Hook Real-World Examples 1. useLocalStorage Hook 2.…
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React
Mastering Array Manipulation in React: Efficient Techniques to Push Object
Introduction Array manipulation is a fundamental aspect of programming in React, essential for managing dynamic data and altering states that impact user interfaces. Developers often encounter scenarios where…
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React
Class Components vs. Functional Components: When to Use Each in React
Class Components vs. Functional Components: When to Use Each in React | MERN Stack Dev Class Components vs. Functional Components: When to Use Each in React A Comprehensive…
