w3.css 탭 헤더 CSS 및 JavaScript를 사용하여 탭 헤더를 만드는 방법을 알아보자. 토글 가능한 탭 헤더 생성 1단계) HTML 추가 <div id=”London” class=”tabcontent”> <h1>London</h1> <p>London is the capital city of England.</p> </div> <div id=”Paris” class=”tabcontent”> <h1>Paris</h1> <p>Paris is the capital of France.</p> </div> <div id=”Tokyo” class=”tabcontent”> <h1>Tokyo</h1> <p>Tokyo is the capital of Japan.</p> </div> <div id=”Oslo” class=”tabcontent”> <h1>Oslo</h1> <p>Oslo is the capital of Norway.</p> </div> <button class=”tablink” onclick=”openCity(‘London’, this, ‘red’)” id=”defaultOpen”>London</button> <button class=”tablink” onclick=”openCity(‘Paris’, this, ‘green’)”>Paris</button> <button class=”tablink” onclick=”openCity(‘Tokyo’, this,…