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HTML

              
                <div class="tabs">
  <div class="tabs-container">
    <button class="tab active-tab">Accueil</button>
    <button class="tab">Services</button>
    <button class="tab">A propos</button>
    </div>
  
  <div class="tab-content active-tab-content">
    <h2>Accueil</h2>
    <p>
      Lorem ipsum dolor sit amet. Qui dolores harum ab itaque voluptatem non dolor quidem. Est tenetur beatae 33 omnis enim et quidem dolore.
    </p>
  </div>
  
  <div class="tab-content">
    <h2>Services</h2>
    <p>
      Lorem ipsum dolor sit amet. Vel praesentium veniam non earum magnam et ratione dignissimos est illum natus. Et officia quos et tenetur optio ea velit itaque non dolor dolorum non internos aperiam quo nostrum ipsa est asperiores tempore. Non maiores assumenda vel iure provident aut animi dolor et perspiciatis soluta est autem mollitia. Et sunt incidunt qui adipisci velit in nihil veritatis id error quae sed architecto doloremque et aliquam incidunt.
    </p>
  </div>
  
  <div class="tab-content">
    <h2>A propos</h2>
    <p>
      Lorem ipsum dolor sit amet. Vel praesentium veniam non earum magnam et ratione dignissimos est illum natus. Et officia quos et tenetur optio ea velit itaque non dolor dolorum non internos aperiam quo nostrum ipsa est asperiores tempore. Non maiores assumenda vel iure provident aut animi dolor et perspiciatis soluta est autem mollitia. Et sunt incidunt qui adipisci velit in nihil veritatis id error quae sed architecto doloremque et aliquam incidunt.
    </p>
    
    <p>Qui quia quibusdam id ipsum vero ut maiores tenetur. Qui reiciendis mollitia aut magni quod non necessitatibus tenetur quo nihil dolorum aut doloribus animi. Eum labore laboriosam aut voluptatem similique quo reprehenderit perspiciatis aut quia nemo sed libero error.
</p>
  </div>
  
</div>
              
            
!

CSS

              
                *, ::before, ::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: sans-serif;
  background: #111;
}

.tabs {
  background: #070707;
  max-width: 800px;
  margin: 100px auto 0;
  border-radius: 10px;
  border: 1px solid #ffffff3e;
  color: #bbb;
  display: grid;
  grid-template-rows: min-content 1fr;
}

.tabs-container {
  display: flex;
  border-bottom: 1px solid #ffffff3e;
}

.tab {
  border: none;
  background: transparent;
  color: #bbb;
  font-family: sans-serif;
  flex-basis: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 20px;
  font-weight: bold;
  padding: 30px 0;
  cursor: pointer;
}

.tab:not(:nth-child(3)) {
  border-right: 1px solid #ffffffe3;
}

.tab:nth-child(1) {
  border-top-left-radius: 9px;
}

.tab:nth-child(3) {
  border-top-right-radius: 9px;
}

.tab-content {
  padding: 40px;
  grid-row-start: 2;
  grid-column-start: 1;
  min-height: 200px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s;
}

.tab-content p {
  margin-top: 20px;
  line-height: 1.6;
}

.tab-content h2 {
  font-size: 25px;
}

.active-tab {
  background: linear-gradient(45deg, rgb(139, 59, 210),rgb(47, 30, 152));
  color: white;
}

.active-tab-content {
  visibility: visible;
  opacity: 1;
}
              
            
!

JS

              
                const tabs = Array.from(document.querySelectorAll(".tab"));

tabs.forEach(tab => {
  tab.addEventListener("click", tabsAnimation);
});

function tabsAnimation(e) {
  const tabContents = Array.from(document.querySelectorAll(".tab-content"));
  const indexToRemove = tabs.findIndex(tab => tab.classList.contains("active-tab"));
  const indexToShow = tabs.indexOf(e.target);
  
  // Toggle les classes sur les onglets
  tabs[indexToRemove].classList.remove("active-tab");
  tabs[indexToShow].classList.add("active-tab");
  
  // Toggle les classes sur les contenues
  tabContents[indexToRemove].classList.remove("active-tab-content");
  tabContents[indexToShow].classList.add("active-tab-content");
}
              
            
!
999px

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