Скачать или смотреть your browser stops everything just to run your javascript

ever wonder why your site freezes during a big data load? it's because javascript runs on a single thread, blocking everything else, including user clicks and screen updates. 👇

1️⃣ One Busy Thread
👉 Your JS code, UI rendering, and user input all share the same main thread. If one task is slow, everything else has to wait in line.

2️⃣ The Event Loop
👉 This is the browser's traffic cop. It moves completed background tasks (like API responses) from a queue to the main thread, but only when it's empty.

3️⃣ Avoid Blocking Code
👉 A long `for` loop or complex calculation will freeze your page. The browser can't repaint or respond to clicks until your script finishes.

4️⃣ Go Asynchronous
👉 Use `async/await` with `fetch` for network calls. This lets the browser handle the request in the background without halting your entire app.

5️⃣ Offload Heavy Work
👉 For truly intense tasks like parsing a huge file, use a Web Worker. It runs your JS in a separate background thread so the UI never stutters.

6️⃣ Animate Smoothly
👉 Use `requestAnimationFrame` for animations instead of `setTimeout`. It syncs your code with the browser's repaint cycle, preventing choppy, janky movement.

7️⃣ Batch DOM Updates
👉 Changing the DOM is slow. Instead of updating it one element at a time in a loop, create the changes in memory and update the DOM just once.

#javascript #webdev #frontend #performancetips

#Shorts #viral