Panel-ready Frontend Master questions for freshers and experienced developers. Practice at Coding Cadre in Faridabad, or Online from Delhi NCR.
useMemo caches an expensive calculated value between renders.
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React.memo wraps a component so it skips re-render when props are shallow-equal.
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Component composition, context for sparse global values, or lightweight stores for frequent updates.
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Keyboard support, aria-expanded, listbox roles, and focus management.
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I target LCP with optimized hero images and server or static HTML where possible.
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Tokens for color and space, documented components, and lint rules against raw hex in apps.
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XSS exfiltrates tokens, mixed content loads bad scripts, and verbose errors reveal internals.
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Component tests catch prop and state bugs fast.
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