baeharam/must-know-about-frontend

This repository is a Korean-language study guide covering the front-end knowledge that someone preparing for a developer job interview should know. The author compiled it from real interview questions and research, aiming for a middle level of depth: not too shallow, not too deep into computer science theory. It focuses strictly on front-end web topics rather than general software engineering. The content is organized into six sections. The first covers general front-end concepts such as how browsers render pages, how JavaScript engines execute code, what bundlers and transpilers do, and the difference between client-side and server-side rendering. The HTML section explains things like the DOCTYPE declaration, browser compatibility modes, data attributes, and the differences between cookies, local storage, and session storage. The CSS section covers the box model, floating layouts, margin collapsing, stacking order, and centering techniques. The JavaScript section is the largest, covering scoping, closures, hoisting, prototypes, the event loop, strict mode, the behavior of the "this" keyword, and the features introduced in each version of the language from ES6 through ES2020. There are also sections on networking concepts such as HTTP, HTTPS, REST APIs, cookies and sessions, and what happens step by step when you type a URL into a browser. The final section covers browser security topics including the same-origin policy and common attack types. All notes link to individual markdown files within the repository for each topic. The project is written entirely in Korean and is aimed at Korean-speaking developers preparing for front-end engineering interviews.