Скачать или смотреть Session 6 | React useEffect Side Effects, Data Fetching & Dependencies | React JS | Dectac 2025

𝗪𝗲𝗹𝗰𝗼𝗺𝗲 𝘁𝗼 𝗦𝗲𝘀𝘀𝗶𝗼𝗻 𝟲 of our ReactJS series!
So far, we’ve focused on state and props to render UI, treating components like “pure functions.” But real-world applications need more — things like fetching data, setting up timers, or listening to real-time updates. These are called side effects, and in React, we handle them with the powerful useEffect Hook.

𝗜𝗻 𝘁𝗵𝗶𝘀 𝘀𝗲𝘀𝘀𝗶𝗼𝗻, 𝘆𝗼𝘂’𝗹𝗹 𝗹𝗲𝗮𝗿𝗻:
  • What side effects are in React (data fetching, timers, subscriptions, DOM updates)
  • Why we need useEffect instead of calling APIs directly in components
  • How to use the dependency array ([], [deps]) effectively
  • Mapping useEffect to old lifecycle methods (mount, update, unmount)
  • The importance of cleanup functions
  • Handling loading and error states during data fetching
  • The try...catch...finally pattern for robust async operations

By the end of this video, you’ll be confident in using useEffect to manage side effects cleanly and efficiently — just like a pro React developer.

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#React #useEffect #ReactHooks #FrontendDevelopment #JavaScript #Dectac