Intermediate everything in Frontend Dev, page 30
CSS Pseudo-classes: Style Elements Based on State
CSS pseudo-classes style elements based on their state, not just their HTML structure. Use them for interactive states like :hover, form validation like :invalid, or structural position like :first-child.
CSS box-sizing: Predictable Element Sizing
The box-sizing property controls if padding and borders are added outside an element's width or carved out from inside. Using border-box makes layouts predictable, ensuring a width: 100px box is exactly 100px wide.
CSS 'display': How Elements Occupy Space
The CSS display property defines an element's layout role: does it demand its own line (block) or share space (inline)? It's essential for everything from text flow to complex layouts with flex and grid.
Server Components, explained without the jargon
React Server Components render on the server and send the client a description of the result, not JavaScript. That means no bundle cost for server rendered parts and direct database access, with client components handling only the interactive pieces.
React interview cheatsheet: hooks rules in 60 seconds
The rules of hooks exist because React identifies each hook by call order, not by name. Call hooks only at the top level of a component or custom hook, never inside a loop, condition, or nested function, or state attaches to the wrong hook.
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