Frontend
Frontend Performance Essentials for 2026
Keep your frontend fast with smart code-splitting, critical CSS, image optimization, and guardrails for expensive work.
Load only what you need
Split routes, lazy load rarely used widgets, and avoid importing huge libraries for tiny helpers.
Be kind to the main thread
Defer expensive computations, batch DOM updates, and use requestIdleCallback for non-urgent tasks.
Images and fonts
Serve modern formats, set width/height to avoid CLS, and keep custom font weights minimal.
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