Async vs Defer — Interview ka Sabse Bada Trap! 😱

Async vs Defer interview me almost har fresher fas jata hai.
In dono script attributes ka difference samajhna bahut important hai —
performance, DOM parsing, aur script execution par direct impact padta hai.

Is video me aap seekhoge:

✔ async script background me download hota hai aur ready होते hi run hota hai
✔ HTML parsing interrupt ho sakta hai
✔ defer script HTML parse hone ke baad hi run hoti hai
✔ multiple defer scripts ka order kabhi break nahi hota
✔ kab async use karna chahiye aur kab defer

Interview Tip:
Third-party → async
Your app scripts → defer

Perfect for: Freshers, frontend beginners, JavaScript learners, interview prep

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