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A JavaScript engine is a computer program or virtual machine that interprets and executes JavaScript code. It is responsible for executing JavaScript programs and running JavaScript code within a web browser or a server-side environment. JavaScript engines are designed to efficiently process JavaScript code by performing various tasks, such as parsing the code, optimizing its execution, and mana..

In CSS, media queries allow you to apply different styles based on specific characteristics of the device or viewport where the webpage is being displayed. Media queries provide a way to create responsive designs that adapt to different screen sizes, resolutions, and other device capabilities. Media queries are introduced using the @media rule and can be used to specify different CSS rules and p..

⇒ Occurs when various elements used in the js file do not exist in the corresponding html file ⇒ It is solved by creating common.js. Also common.css too.

https://fontawesome.com/docs/web/add-icons/how-to How To Add Icons The internet's icon library + toolkit. Used by millions of designers, devs, & content creators. Open-source. Always free. Always awesome. fontawesome.com google font google material icon

https://developers.google.com/youtube/iframe_api_reference?hl=ko iframe 삽입에 대한 YouTube Player API 참조 문서 | YouTube IFrame Player API | Google for Developers 애플리케이션에 YouTube 플레이어를 삽입합니다. developers.google.com

ScrollMagic is a JavaScript library that provides a simple way to create scroll-based animations and interactions on websites. It allows you to trigger animations and control elements based on the user's scroll position, providing a visually engaging and interactive experience. ScrollMagic provides a range of features and functionalities that make it easier to create scroll-based animations: Scr..