<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-0evHe/X+R7YkIZDRvuzKMRqM+OrBnVFBL6DOitfPri4tjfHxaWutUpFmBp4vmVor" crossorigin="anonymous">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.8.3/font/bootstrap-icons.css">
bootstrap 적용코드
<body>
<header class="bg-primary text-white text-center p-5">
<h1>My First Bootstrap 5 page</h1>
<p>Resize this responsive page to see the effect!</p>
</header>
<nav class="navbar bg-dark navbar-dark navbar-expand-sm">
<div class="container-fluid"> <!-- width:100 %-->
<ul class="navbar-nav">
<li class="nav-item"><a class="nav-link" href="#">Active</a></li>
<li class="nav-item"><a class="nav-link" href="#">Link</a></li>
<li class="nav-item"><a class="nav-link" href="#">Link</a></li>
<li class="nav-item"><a class="nav-link Disabled" >Disabled</a></li>
</ul>
</div>
</nav>
navbar-expand-sm : sm에서 수직 정렬
"container-fluid" : width:100 %

<section class="container mt-5">
<div class="row">
<aside class="col-sm-4">
<h2>About Me</h2>
<p class="h5">photo of me: </p>
<div class="fakeimg">Fake image</div>
<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Velit nobis tempore nulla, a accusantium magnam vero officiis adipisci excepturi, aliquid ipsa, error fugiat maiores ipsum est maxime possimus praesentium commodi?</p>
<h3>Some Links</h3>
<ul class=" nav flex-column">
<li class="nav-item"><a class="nav-link" href="#">Active</a></li>
<li class="nav-item"><a class="nav-link" href="#">link</a></li>
<li class="nav-item"><a class="nav-link" href="#">link</a></li>
<li class="nav-item"><a class="nav-link" href="#">Disabled</a></li>
</ul>
<!-- 미디어쿼리는 지정된 중단점보다 큰화면 너비에 영향을 준다 -->
<hr class="d-sm-none">
</aside>
nav: 간단한 수평메뉴
flex-column: 항상세로메뉴
nav-pills: active에 테두리 넣기

<article class="col-sm-8">
<h2>title heading</h2>
<!-- <h5>Title description dec7, 2022 </h5> -->
<p class="h5">Title description dec7, 2022 </p>
<div class="fakeimg">Fake Image</div>
<p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Quia at, ipsum totam voluptates harum praesentium excepturi. Distinctio, magni sint soluta repudiandae sapiente nam, labore, blanditiis veniam dolorum accusantium delectus harum?</p>
<h2>title heading</h2>
<!-- <h5>Title description dec7, 2022 </h5> -->
<p class="h5">Title description dec7, 2022 </p>
<div class="fakeimg">Fake Image</div>
<p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Quia at, ipsum totam voluptates harum praesentium excepturi. Distinctio, magni sint soluta repudiandae sapiente nam, labore, blanditiis veniam dolorum accusantium delectus harum?</p>
</article>
<!-- <h5>Title description dec7, 2022 </h5> --> =
<p class="h5">Title description dec7, 2022 </p>
둘중 아무거나 써도 무방

<footer class="bg-dark text-white d-flex justify-content-between
align-items-center p-4 mt-5 ">
<p>footer</p>
<div>
<i class="ms-3 bi bi-twitch"></i>
<i class="ms-3 bi bi-facebook"></i>
<i class="ms-3 bi bi-instagram"></i>
<i class="ms-3 bi bi-google"></i>
</div>
</footer>
bi bi-xxxx : 원하는 이미지 삽입
bg-xxxx: 백그라운드 색상
d-flex : display flex

bootstrap을 다시 써보는시간을 가졌는데 심플하게 웹페이지를 만든다면 이보다 좋은 프레임워크는 없을거같다.
대신 너무 자주사용하면 일반적인 css html 실력을 늘리는데는 어려움이 있을거같다.