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Trung bình Pro#react#strictmode#fundamentals

React StrictMode là gì và tại sao nó khiến component render hai lần?

15 tháng 2, 2026

Tóm tắt nhanh

React StrictMode là một công cụ hỗ trợ phát triển (development-only) giúp phát hiện sớm các lỗi logic và rò rỉ bộ nhớ bằng cách cố ý render component và chạy các hiệu ứng (effects) hai lần. Cơ chế này giúp đảm bảo component hoạt động an toàn, chuẩn bị cho các tính năng bất đồng bộ (Concurrent Rendering) của React.

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React StrictMode là gì và tại sao nó khiến component render hai lần? · ORA·tech