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Build a ReAct React Web App with LangChain, OpenAI, and Google Serper

Last Updated: September 7th, 2026

A ReAct react web app turns a static chatbot into an agent. It thinks, searches the live web, and acts on what it finds. What makes it powerful also makes it fragile. How you manage the execution flow decides how fast the app responds and how safely it handles data. Get the loop right, and you can…