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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <div id="map-wrapper">
      <div class="map-options">OPTION 1</div>
      <div class="map-options">OPTION 2</div>
      <div class="map-options">OPTION 3</div>
      <div class="map-options">OPTION 4</div>
</div>
<div id="dropdown-wrapper">
      <h2>LABEL</h2>
      <ul class="dropdown">
            <li class="options">OPTION 1</li>
            <li class="options">OPTION 2</li>
            <li class="options">OPTION 3</li>
            <li class="options">OPTION 4</li>
      </ul>
</div>
<div class="tab-wrapper">

      <div class="tabs tab-1">
            <div class="rows">
                  <div>
                        <div class="img-wrapper">
                              <img src="https://cdn.shopify.com/s/files/1/0668/0189/3661/files/placeholder-2.jpg?v=1678308061">
                        </div>
                  </div>
                  <div>
                        <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quod nobis, ipsum impedit voluptate ratione, unde itaque officiis tenetur repellendus dignissimos in voluptates! A, laborum quidem. Reiciendis maiores est nisi modi minus tenetur sapiente corrupti eos voluptatem explicabo inventore odio repudiandae excepturi nam, hic enim id, minima dicta harum. Quae harum, facere facilis aliquid molestiae labore veniam quos consequuntur inventore delectus iusto deserunt numquam libero quibusdam! Rerum odit hic alias commodi voluptates asperiores error reprehenderit facere atque dignissimos voluptatem, soluta magni eveniet iure laboriosam, qui nostrum nulla obcaecati inventore sint provident numquam incidunt tempore? Quod sunt dolorum distinctio, nemo eveniet consectetur.</p>
                  </div>
            </div>
            <div class="rows">
                  <div>
                        <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quod nobis, ipsum impedit voluptate ratione, unde itaque officiis tenetur repellendus dignissimos in voluptates! A, laborum quidem. Reiciendis maiores est nisi modi minus tenetur sapiente corrupti eos voluptatem explicabo inventore odio repudiandae excepturi nam, hic enim id, minima dicta harum. Quae harum, facere facilis aliquid molestiae labore veniam quos consequuntur inventore delectus iusto deserunt numquam libero quibusdam! Rerum odit hic alias commodi voluptates asperiores error reprehenderit facere atque dignissimos voluptatem, soluta magni eveniet iure laboriosam, qui nostrum nulla obcaecati inventore sint provident numquam incidunt tempore? Quod sunt dolorum distinctio, nemo eveniet consectetur.</p>
                  </div>
                  <div>
                        <div class="img-wrapper">
                              <img src="https://cdn.shopify.com/s/files/1/0668/0189/3661/files/placeholder-2-2.jpg?v=1678308062">
                        </div>
                  </div>
            </div>
      </div>

      <div class="tabs tab-2">
            <div class="rows">
                  <div>
                        <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quod nobis, ipsum impedit voluptate ratione, unde itaque officiis tenetur repellendus dignissimos in voluptates! A, laborum quidem. Reiciendis maiores est nisi modi minus tenetur sapiente corrupti eos voluptatem explicabo inventore odio repudiandae excepturi nam, hic enim id, minima dicta harum. Quae harum, facere facilis aliquid molestiae labore veniam quos consequuntur inventore delectus iusto deserunt numquam libero quibusdam! Rerum odit hic alias commodi voluptates asperiores error reprehenderit facere atque dignissimos voluptatem, soluta magni eveniet iure laboriosam, qui nostrum nulla obcaecati inventore sint provident numquam incidunt tempore? Quod sunt dolorum distinctio, nemo eveniet consectetur.</p>
                  </div>
                  <div>
                        <div class="img-wrapper">
                              <img src="https://cdn.shopify.com/s/files/1/0668/0189/3661/files/placeholder-1.jpg?v=1678308062">
                        </div>
                  </div>
            </div>
            <div class="rows">
                  <div>
                        <div class="img-wrapper">
                              <img src="https://cdn.shopify.com/s/files/1/0668/0189/3661/files/placeholder-1-1.jpg?v=1678308061">
                        </div>
                  </div>
                  <div>
                        <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quod nobis, ipsum impedit voluptate ratione, unde itaque officiis tenetur repellendus dignissimos in voluptates! A, laborum quidem. Reiciendis maiores est nisi modi minus tenetur sapiente corrupti eos voluptatem explicabo inventore odio repudiandae excepturi nam, hic enim id, minima dicta harum. Quae harum, facere facilis aliquid molestiae labore veniam quos consequuntur inventore delectus iusto deserunt numquam libero quibusdam! Rerum odit hic alias commodi voluptates asperiores error reprehenderit facere atque dignissimos voluptatem, soluta magni eveniet iure laboriosam, qui nostrum nulla obcaecati inventore sint provident numquam incidunt tempore? Quod sunt dolorum distinctio, nemo eveniet consectetur.</p>
                  </div>
            </div>
      </div>

      <div class="tabs tab-3">
            <div class="rows">
                  <div>
                        <div class="img-wrapper">
                              <img src="https://cdn.shopify.com/s/files/1/0668/0189/3661/files/placeholder-2.jpg?v=1678308061">
                        </div>
                  </div>
                  <div>
                        <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quod nobis, ipsum impedit voluptate ratione, unde itaque officiis tenetur repellendus dignissimos in voluptates! A, laborum quidem. Reiciendis maiores est nisi modi minus tenetur sapiente corrupti eos voluptatem explicabo inventore odio repudiandae excepturi nam, hic enim id, minima dicta harum. Quae harum, facere facilis aliquid molestiae labore veniam quos consequuntur inventore delectus iusto deserunt numquam libero quibusdam! Rerum odit hic alias commodi voluptates asperiores error reprehenderit facere atque dignissimos voluptatem, soluta magni eveniet iure laboriosam, qui nostrum nulla obcaecati inventore sint provident numquam incidunt tempore? Quod sunt dolorum distinctio, nemo eveniet consectetur.</p>
                  </div>
            </div>
            <div class="rows">
                  <div>
                        <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quod nobis, ipsum impedit voluptate ratione, unde itaque officiis tenetur repellendus dignissimos in voluptates! A, laborum quidem. Reiciendis maiores est nisi modi minus tenetur sapiente corrupti eos voluptatem explicabo inventore odio repudiandae excepturi nam, hic enim id, minima dicta harum. Quae harum, facere facilis aliquid molestiae labore veniam quos consequuntur inventore delectus iusto deserunt numquam libero quibusdam! Rerum odit hic alias commodi voluptates asperiores error reprehenderit facere atque dignissimos voluptatem, soluta magni eveniet iure laboriosam, qui nostrum nulla obcaecati inventore sint provident numquam incidunt tempore? Quod sunt dolorum distinctio, nemo eveniet consectetur.</p>
                  </div>
                  <div>
                        <div class="img-wrapper">
                              <img src="https://cdn.shopify.com/s/files/1/0668/0189/3661/files/placeholder-2-2.jpg?v=1678308062">
                        </div>
                  </div>
            </div>
      </div>

      <div class="tabs tab-4">
            <div class="rows">
                  <div>
                        <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quod nobis, ipsum impedit voluptate ratione, unde itaque officiis tenetur repellendus dignissimos in voluptates! A, laborum quidem. Reiciendis maiores est nisi modi minus tenetur sapiente corrupti eos voluptatem explicabo inventore odio repudiandae excepturi nam, hic enim id, minima dicta harum. Quae harum, facere facilis aliquid molestiae labore veniam quos consequuntur inventore delectus iusto deserunt numquam libero quibusdam! Rerum odit hic alias commodi voluptates asperiores error reprehenderit facere atque dignissimos voluptatem, soluta magni eveniet iure laboriosam, qui nostrum nulla obcaecati inventore sint provident numquam incidunt tempore? Quod sunt dolorum distinctio, nemo eveniet consectetur.</p>
                  </div>
                  <div>
                        <div class="img-wrapper">
                              <img src="https://cdn.shopify.com/s/files/1/0668/0189/3661/files/placeholder-3.jpg?v=1678308061">
                        </div>
                  </div>
            </div>
            <div class="rows">
                  <div>
                        <div class="img-wrapper">
                              <img src="https://cdn.shopify.com/s/files/1/0668/0189/3661/files/placeholder-3-3.jpg?v=1678308061">
                        </div>
                  </div>
                  <div>
                        <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quod nobis, ipsum impedit voluptate ratione, unde itaque officiis tenetur repellendus dignissimos in voluptates! A, laborum quidem. Reiciendis maiores est nisi modi minus tenetur sapiente corrupti eos voluptatem explicabo inventore odio repudiandae excepturi nam, hic enim id, minima dicta harum. Quae harum, facere facilis aliquid molestiae labore veniam quos consequuntur inventore delectus iusto deserunt numquam libero quibusdam! Rerum odit hic alias commodi voluptates asperiores error reprehenderit facere atque dignissimos voluptatem, soluta magni eveniet iure laboriosam, qui nostrum nulla obcaecati inventore sint provident numquam incidunt tempore? Quod sunt dolorum distinctio, nemo eveniet consectetur.</p>
                  </div>
            </div>
      </div>

</div>
!

CSS 

              
                * {
    box-sizing: border-box;
    scroll-behavior: smooth;
}
body {
    padding: 40px;
    margin: 0;
}
#map-wrapper {
    position: relative;
    box-sizing: border-box;
    width: 100%;
    height: auto;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    column-gap: 40px;
    row-gap: 20px;
    padding: 30px;
    margin-bottom: 40px;
    border: 1px solid rgba(0,0,0, 0.5);
}
#map-wrapper div {
    position: relative;
    box-sizing: border-box;
    width: 100%;
    max-width: 300px;
    min-width: 200px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    color: #000;
    cursor: pointer;
}
#map-wrapper div:nth-child(1) {
    background-color: grey;
}
#map-wrapper div:nth-child(2) {
    background-color: purple;
}
#map-wrapper div:nth-child(3) {
    background-color: green;
}
#map-wrapper div:nth-child(4) {
    background-color: turquoise;
}
#dropdown-wrapper {
    position: relative;
    box-sizing: border-box;
    width: 100%;
    height: 51px;
    max-width: 300px;
    min-width: 200px;
    margin: 0;
    margin-bottom: 40px;
    z-index: 2;
    overflow: hidden;
}
#dropdown-wrapper.active {
    overflow: initial;
}
#dropdown-wrapper h2 {
    position: absolute;
    top: 0;
    left: 0;
    padding: 5px;
    font-size: 12px;
    font-weight: normal;
    margin: 0;
    z-index: 2;
}
.dropdown {
    position: relative;
    display: flex;
    padding: 0;
    flex-direction: column;
    width: 100%;
    height: auto;
    margin: 0;
    background-color: #fff;
    border: 1px solid rgba(0,0,0, 0.5);
    border-bottom: 0;
}
.options {
    order: 2;
    width: 100%;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid rgba(0,0,0, 0.5);
}
.options {
    text-align: center;
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    color: #000;
    position: relative;
    cursor: pointer;
    list-style: none;
}
.tab-wrapper {
    width: 100%;
    overflow: hidden;
    position: relative;
    z-index: 1;
}
.tabs {
    left: 0;
    top: 0;
    width: 100%;
}
.tab-1 {
    background-color: grey;
}
.tab-2 {
    background-color: purple;
}
.tab-3 {
    background-color: green;
}
.tab-4 {
    background-color: turquoise;
}
.rows {
    position: relative;
    box-sizing: border-box;
    width: 100%;
    height: auto;
    display: flex;
    flex-direction: row;
    padding-bottom: 40px;
}
.rows>div {
    position: relative;
    box-sizing: border-box;
    width: 50%;
    height: auto;
    padding: 20px;
}
.rows .img-wrapper {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 100%;
}
img {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    object-fit: cover;
    object-position: center;
}
p {
    font-size: 24px;
    margin: 0;
}
!

JS 

              
                document.addEventListener("DOMContentLoaded", function(event) { 
window.requestAnimationFrame(function() {

console.clear();
let options = document.querySelectorAll(".options");
const optionsBtns = gsap.utils.toArray("#map-wrapper div");
let tabs = document.querySelectorAll(".tabs");
let activeTab = 0;
let old = 0;
let animation;

for (let i = 0; i < options.length; i++) {
  options[i].index = i;
  gsap.set(tabs[i], {autoAlpha: 0, position: "absolute"}); 
  options[i].addEventListener("click", toogleTabs);
}

for (let i = 0; i < options.length; i++) {
  options[i].index = i;
  optionsBtns[i].index = i;
  gsap.set(tabs[i], { autoAlpha: 0, position: "absolute" });
  options[i].addEventListener("click", toogleTabs);
  optionsBtns[i].addEventListener("click", toogleTabs);
}

gsap.set(tabs[0], {autoAlpha: 1, position: "relative"});
gsap.set(options[0], {color:"blue"});
gsap.set(optionsBtns[0], {color:"blue"});

function toogleTabs() {
  if(this.index != activeTab) {
    if (animation && animation.isActive()) {animation.progress(1);}
    animation = gsap.timeline({defaults:{duration:0}});
    old = activeTab;
    activeTab = this.index;
    animation.to(options[old], {color:"#000",order: 2});
    animation.to(options[activeTab], {color:"blue",order: 1});

    animation.to(optionsBtns[old], {color:"#000"});
    animation.to(optionsBtns[activeTab], {color:"blue"});

    animation.to(tabs[old], {autoAlpha: 0, position: "absolute", zIndex: 1,});
    animation.set(tabs[old], {autoAlpha: 0, position: "absolute"});
    animation.to(tabs[activeTab], {duration: 0, position: "relative", autoAlpha: 1, zIndex: 10});
  }
}

let dropdown = document.querySelectorAll("#dropdown-wrapper");
dropdown[0].addEventListener("click", dropdownToogle);
function dropdownToogle() {
  if(dropdown[0].classList.contains("active")) {dropdown[0].classList.remove("active");}
  else dropdown[0].classList.add("active");
}

});
});
!
999px

Console