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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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HTML 

              
                <div class="cards">
  <div class="card js-card">
    <div class="card__content">
      <button class="card__close js-close-button">
        <svg
          fill="currentColor"
          viewBox="0 0 64 64"
          xmlns="http://www.w3.org/2000/svg"
        >
          <path
            d="m4.59 59.41a2 2 0 0 0 2.83 0l24.58-24.58 24.59 24.58a2 2 0 0 0 2.83-2.83l-24.59-24.58 24.58-24.59a2 2 0 0 0 -2.83-2.83l-24.58 24.59-24.59-24.58a2 2 0 0 0 -2.82 2.82l24.58 24.59-24.58 24.59a2 2 0 0 0 0 2.82z"
          />
        </svg>
      </button>
      <div class="card__header">
        <img
          class="card__user-image js-animatable"
          src="https://tahazsh.com/images/taha.jpg"
          alt=""
        />
        <div class="card__user-info">
          <h2 class="card__title js-animatable">Taha Shashtari</h2>
          <div class="card__subtitle js-animatable">
            Full-stack Developer
          </div>
          <ul class="card__user-links js-animatable">
            <li class="card__user-link">
              <a href="https://tahazsh.com" alt="Blog">
                <svg
                  class="card__user-link-icon"
                  enable-background="new 0 0 512 512"
                  viewBox="0 0 512 512"
                  xmlns="http://www.w3.org/2000/svg"
                >
                  <g>
                    <path
                      d="m100 323.265h60c11.046 0 20-8.954 20-20s-8.954-20-20-20h-60c-11.046 0-20 8.954-20 20s8.954 20 20 20z"
                    />
                    <path
                      d="m100 243.265h60c11.046 0 20-8.954 20-20s-8.954-20-20-20h-60c-11.046 0-20 8.954-20 20s8.954 20 20 20z"
                    />
                    <path
                      d="m217.441 303.265c0 11.046 8.954 20 20 20 41.821 0 81.139-16.286 110.711-45.858l146.26-146.274c23.448-23.447 23.452-61.402 0-84.853-23.393-23.394-61.458-23.394-84.853 0l-146.26 146.274c-29.571 29.573-45.858 68.89-45.858 110.711zm220.404-228.7c7.796-7.798 20.486-7.798 28.283 0 7.816 7.814 7.819 20.467 0 28.284l-146.261 146.274c-16.719 16.72-37.624 27.735-60.352 32.068 4.333-22.727 15.349-43.632 32.067-60.352z"
                    />
                    <path
                      d="m60 483.265c14.776 0 28.978-5.422 39.992-15.27l27.647-24.73h204.361c55.141 0 100-44.86 100-100v-44.863c0-11.046-8.954-20-20-20s-20 8.954-20 20v44.863c0 33.084-26.916 60-60 60h-212c-4.92 0-9.667 1.813-13.334 5.093l-33.338 29.821c-3.669 3.28-8.402 5.086-13.328 5.086-11.028 0-20-8.972-20-20v-240c0-33.084 26.916-60 60-60h167.749c11.046 0 20-8.954 20-20s-8.954-20-20-20h-167.749c-55.141 0-100 44.86-100 100v240c0 33.084 26.916 60 60 60z"
                    />
                  </g>
                </svg>
              </a>
            </li>
            <li class="card__user-link">
              <a href="https://twitter.com/tahazsh" alt="Twitter">
                <svg
                  class="card__user-link-icon"
                  xmlns="http://www.w3.org/2000/svg"
                  xml:space="preserve"
                  viewBox="0 0 248 204"
                >
                  <path
                    d="M221.95 51.29c.15 2.17.15 4.34.15 6.53 0 66.73-50.8 143.69-143.69 143.69v-.04c-27.44.04-54.31-7.82-77.41-22.64 3.99.48 8 .72 12.02.73 22.74.02 44.83-7.61 62.72-21.66-21.61-.41-40.56-14.5-47.18-35.07 7.57 1.46 15.37 1.16 22.8-.87-23.56-4.76-40.51-25.46-40.51-49.5v-.64c7.02 3.91 14.88 6.08 22.92 6.32C11.58 63.31 4.74 33.79 18.14 10.71c25.64 31.55 63.47 50.73 104.08 52.76-4.07-17.54 1.49-35.92 14.61-48.25 20.34-19.12 52.33-18.14 71.45 2.19 11.31-2.23 22.15-6.38 32.07-12.26-3.77 11.69-11.66 21.62-22.2 27.93 10.01-1.18 19.79-3.86 29-7.95-6.78 10.16-15.32 19.01-25.2 26.16z"
                  /></svg
              ></a>
            </li>
          </ul>
        </div>
      </div>

      <div class="card__bio js-animatable">
        Lorem, ipsum dolor sit amet consectetur adipisicing elit. Ratione,
        iusto. Sed, hic corrupti autem atque provident debitis ex modi
        facilis iusto mollitia nam maxime sit eos vitae illo nisi eligendi
        animi reiciendis laborum odit in aperiam natus! Voluptatibus
        perferendis doloribus tenetur veritatis numquam natus, iste, eaque
        dicta, magni aspernatur sunt corrupti consequatur? Porro tempora
        veritatis vitae maxime dolor, facilis quidem quae ipsam voluptatibus
        doloribus eius eum temporibus assumenda deleniti nulla minus quos
        possimus magnam adipisci dignissimos sapiente consequatur
        recusandae. Quaerat saepe adipisci, nihil, quae necessitatibus dicta
        assumenda labore blanditiis fugit similique ipsum quod culpa
        distinctio dolore ex quasi odio veritatis.
      </div>

      <div class="card__images js-animatable">
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/250x250?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/250x280?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/270x270?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/280x280?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/290x290?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/300x300?flowers"
          alt=""
        />
      </div>
    </div>
  </div>
  <div class="card js-card">
    <div class="card__content">
      <button class="card__close js-close-button">
        <svg
          fill="currentColor"
          viewBox="0 0 64 64"
          xmlns="http://www.w3.org/2000/svg"
        >
          <path
            d="m4.59 59.41a2 2 0 0 0 2.83 0l24.58-24.58 24.59 24.58a2 2 0 0 0 2.83-2.83l-24.59-24.58 24.58-24.59a2 2 0 0 0 -2.83-2.83l-24.58 24.59-24.59-24.58a2 2 0 0 0 -2.82 2.82l24.58 24.59-24.58 24.59a2 2 0 0 0 0 2.82z"
          />
        </svg>
      </button>
      <div class="card__header">
        <img
          class="card__user-image js-animatable"
          src="https://images.unsplash.com/photo-1523825036634-aab3cce05919?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=250&q=80"
          alt=""
        />
        <div class="card__user-info">
          <h2 class="card__title js-animatable">Jane Doe</h2>
          <div class="card__subtitle js-animatable">UI/UX Designer</div>
          <ul class="card__user-links js-animatable">
            <li class="card__user-link">
              <a href="https://tahazsh.com" alt="Blog">
                <svg
                  class="card__user-link-icon"
                  enable-background="new 0 0 512 512"
                  viewBox="0 0 512 512"
                  xmlns="http://www.w3.org/2000/svg"
                >
                  <g>
                    <path
                      d="m100 323.265h60c11.046 0 20-8.954 20-20s-8.954-20-20-20h-60c-11.046 0-20 8.954-20 20s8.954 20 20 20z"
                    />
                    <path
                      d="m100 243.265h60c11.046 0 20-8.954 20-20s-8.954-20-20-20h-60c-11.046 0-20 8.954-20 20s8.954 20 20 20z"
                    />
                    <path
                      d="m217.441 303.265c0 11.046 8.954 20 20 20 41.821 0 81.139-16.286 110.711-45.858l146.26-146.274c23.448-23.447 23.452-61.402 0-84.853-23.393-23.394-61.458-23.394-84.853 0l-146.26 146.274c-29.571 29.573-45.858 68.89-45.858 110.711zm220.404-228.7c7.796-7.798 20.486-7.798 28.283 0 7.816 7.814 7.819 20.467 0 28.284l-146.261 146.274c-16.719 16.72-37.624 27.735-60.352 32.068 4.333-22.727 15.349-43.632 32.067-60.352z"
                    />
                    <path
                      d="m60 483.265c14.776 0 28.978-5.422 39.992-15.27l27.647-24.73h204.361c55.141 0 100-44.86 100-100v-44.863c0-11.046-8.954-20-20-20s-20 8.954-20 20v44.863c0 33.084-26.916 60-60 60h-212c-4.92 0-9.667 1.813-13.334 5.093l-33.338 29.821c-3.669 3.28-8.402 5.086-13.328 5.086-11.028 0-20-8.972-20-20v-240c0-33.084 26.916-60 60-60h167.749c11.046 0 20-8.954 20-20s-8.954-20-20-20h-167.749c-55.141 0-100 44.86-100 100v240c0 33.084 26.916 60 60 60z"
                    />
                  </g>
                </svg>
              </a>
            </li>
            <li class="card__user-link">
              <a href="https://twitter.com/tahazsh" alt="Twitter">
                <svg
                  class="card__user-link-icon"
                  xmlns="http://www.w3.org/2000/svg"
                  xml:space="preserve"
                  viewBox="0 0 248 204"
                >
                  <path
                    d="M221.95 51.29c.15 2.17.15 4.34.15 6.53 0 66.73-50.8 143.69-143.69 143.69v-.04c-27.44.04-54.31-7.82-77.41-22.64 3.99.48 8 .72 12.02.73 22.74.02 44.83-7.61 62.72-21.66-21.61-.41-40.56-14.5-47.18-35.07 7.57 1.46 15.37 1.16 22.8-.87-23.56-4.76-40.51-25.46-40.51-49.5v-.64c7.02 3.91 14.88 6.08 22.92 6.32C11.58 63.31 4.74 33.79 18.14 10.71c25.64 31.55 63.47 50.73 104.08 52.76-4.07-17.54 1.49-35.92 14.61-48.25 20.34-19.12 52.33-18.14 71.45 2.19 11.31-2.23 22.15-6.38 32.07-12.26-3.77 11.69-11.66 21.62-22.2 27.93 10.01-1.18 19.79-3.86 29-7.95-6.78 10.16-15.32 19.01-25.2 26.16z"
                  /></svg
              ></a>
            </li>
          </ul>
        </div>
      </div>

      <div class="card__bio js-animatable">
        Lorem, ipsum dolor sit amet consectetur adipisicing elit. Ratione,
        iusto. Sed, hic corrupti autem atque provident debitis ex modi
        facilis iusto mollitia nam maxime sit eos vitae illo nisi eligendi
        animi reiciendis laborum odit in aperiam natus! Voluptatibus
        perferendis doloribus tenetur veritatis numquam natus, iste, eaque
        dicta, magni aspernatur sunt corrupti consequatur? Porro tempora
        veritatis vitae maxime dolor, facilis quidem quae ipsam voluptatibus
        doloribus eius eum temporibus assumenda deleniti nulla minus quos
        possimus magnam adipisci dignissimos sapiente consequatur
        recusandae. Quaerat saepe adipisci, nihil, quae necessitatibus dicta
        assumenda labore blanditiis fugit similique ipsum quod culpa
        distinctio dolore ex quasi odio veritatis.
      </div>

      <div class="card__images js-animatable">
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/250x250?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/250x280?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/270x270?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/280x280?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/290x290?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/300x300?flowers"
          alt=""
        />
      </div>
    </div>
  </div>
  <div class="card js-card">
    <div class="card__content">
      <button class="card__close js-close-button">
        <svg
          fill="currentColor"
          viewBox="0 0 64 64"
          xmlns="http://www.w3.org/2000/svg"
        >
          <path
            d="m4.59 59.41a2 2 0 0 0 2.83 0l24.58-24.58 24.59 24.58a2 2 0 0 0 2.83-2.83l-24.59-24.58 24.58-24.59a2 2 0 0 0 -2.83-2.83l-24.58 24.59-24.59-24.58a2 2 0 0 0 -2.82 2.82l24.58 24.59-24.58 24.59a2 2 0 0 0 0 2.82z"
          />
        </svg>
      </button>
      <div class="card__header">
        <img
          class="card__user-image js-animatable"
          src="https://images.unsplash.com/photo-1568602471122-7832951cc4c5?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=250&q=80"
          alt=""
        />
        <div class="card__user-info">
          <h2 class="card__title js-animatable">John Doe</h2>
          <div class="card__subtitle js-animatable">
            Front-End Developer
          </div>
          <ul class="card__user-links js-animatable">
            <li class="card__user-link">
              <a href="https://tahazsh.com" alt="Blog">
                <svg
                  class="card__user-link-icon"
                  enable-background="new 0 0 512 512"
                  viewBox="0 0 512 512"
                  xmlns="http://www.w3.org/2000/svg"
                >
                  <g>
                    <path
                      d="m100 323.265h60c11.046 0 20-8.954 20-20s-8.954-20-20-20h-60c-11.046 0-20 8.954-20 20s8.954 20 20 20z"
                    />
                    <path
                      d="m100 243.265h60c11.046 0 20-8.954 20-20s-8.954-20-20-20h-60c-11.046 0-20 8.954-20 20s8.954 20 20 20z"
                    />
                    <path
                      d="m217.441 303.265c0 11.046 8.954 20 20 20 41.821 0 81.139-16.286 110.711-45.858l146.26-146.274c23.448-23.447 23.452-61.402 0-84.853-23.393-23.394-61.458-23.394-84.853 0l-146.26 146.274c-29.571 29.573-45.858 68.89-45.858 110.711zm220.404-228.7c7.796-7.798 20.486-7.798 28.283 0 7.816 7.814 7.819 20.467 0 28.284l-146.261 146.274c-16.719 16.72-37.624 27.735-60.352 32.068 4.333-22.727 15.349-43.632 32.067-60.352z"
                    />
                    <path
                      d="m60 483.265c14.776 0 28.978-5.422 39.992-15.27l27.647-24.73h204.361c55.141 0 100-44.86 100-100v-44.863c0-11.046-8.954-20-20-20s-20 8.954-20 20v44.863c0 33.084-26.916 60-60 60h-212c-4.92 0-9.667 1.813-13.334 5.093l-33.338 29.821c-3.669 3.28-8.402 5.086-13.328 5.086-11.028 0-20-8.972-20-20v-240c0-33.084 26.916-60 60-60h167.749c11.046 0 20-8.954 20-20s-8.954-20-20-20h-167.749c-55.141 0-100 44.86-100 100v240c0 33.084 26.916 60 60 60z"
                    />
                  </g>
                </svg>
              </a>
            </li>
            <li class="card__user-link">
              <a href="https://twitter.com/tahazsh" alt="Twitter">
                <svg
                  class="card__user-link-icon"
                  xmlns="http://www.w3.org/2000/svg"
                  xml:space="preserve"
                  viewBox="0 0 248 204"
                >
                  <path
                    d="M221.95 51.29c.15 2.17.15 4.34.15 6.53 0 66.73-50.8 143.69-143.69 143.69v-.04c-27.44.04-54.31-7.82-77.41-22.64 3.99.48 8 .72 12.02.73 22.74.02 44.83-7.61 62.72-21.66-21.61-.41-40.56-14.5-47.18-35.07 7.57 1.46 15.37 1.16 22.8-.87-23.56-4.76-40.51-25.46-40.51-49.5v-.64c7.02 3.91 14.88 6.08 22.92 6.32C11.58 63.31 4.74 33.79 18.14 10.71c25.64 31.55 63.47 50.73 104.08 52.76-4.07-17.54 1.49-35.92 14.61-48.25 20.34-19.12 52.33-18.14 71.45 2.19 11.31-2.23 22.15-6.38 32.07-12.26-3.77 11.69-11.66 21.62-22.2 27.93 10.01-1.18 19.79-3.86 29-7.95-6.78 10.16-15.32 19.01-25.2 26.16z"
                  /></svg
              ></a>
            </li>
          </ul>
        </div>
      </div>

      <div class="card__bio js-animatable">
        Lorem, ipsum dolor sit amet consectetur adipisicing elit. Ratione,
        iusto. Sed, hic corrupti autem atque provident debitis ex modi
        facilis iusto mollitia nam maxime sit eos vitae illo nisi eligendi
        animi reiciendis laborum odit in aperiam natus! Voluptatibus
        perferendis doloribus tenetur veritatis numquam natus, iste, eaque
        dicta, magni aspernatur sunt corrupti consequatur? Porro tempora
        veritatis vitae maxime dolor, facilis quidem quae ipsam voluptatibus
        doloribus eius eum temporibus assumenda deleniti nulla minus quos
        possimus magnam adipisci dignissimos sapiente consequatur
        recusandae. Quaerat saepe adipisci, nihil, quae necessitatibus dicta
        assumenda labore blanditiis fugit similique ipsum quod culpa
        distinctio dolore ex quasi odio veritatis.
      </div>

      <div class="card__images js-animatable">
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/250x250?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/260x260?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/270x270?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/280x280?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/290x290?flowers"
          alt=""
        />
        <img
          class="card__image"
          src="https://source.unsplash.com/featured/300x300?flowers"
          alt=""
        />
      </div>
    </div>
  </div>
</div>
!

CSS 

              
                * {
  box-sizing: border-box;
}

:root {
  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
}

body {
  max-width: 800px;
  padding: 50px;
  margin: 0 auto;
  display: flex;
  place-items: center;
  min-height: 100vh;
}

.cards {
  width: 100%;
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

.card {
  width: 100%;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.card--expanded {
  cursor: default;
}

.card__content {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 16px;
  border-radius: 5px;
  background: rgb(122, 102, 191);
  overflow: hidden;
}

.card:nth-child(2) .card__content {
  background: rgb(191, 102, 158);
}

.card:nth-child(3) .card__content {
  background: rgb(24, 149, 91);
}

.card--expanded .card__content {
  border-radius: 0;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  justify-content: flex-start;
  align-items: flex-start;
  overflow: auto;
}

.card__user-image {
  border-radius: 50%;
  width: 120px;
  height: 120px;
  object-fit: cover;
  will-change: transform;
  transform-origin: 0 0;
}

.card--expanded .card__user-image {
  width: 100px;
  height: 100px;
}

.card__images {
  display: grid;
  gap: 10px;
  max-width: 800px;
  width: 100%;
  margin: 50px auto 0;
  transform-origin: 0 0;
  position: absolute;
  top: 100%;
}

.card--expanded .card__images {
  position: static;
}

.card__image {
  border-radius: 5px;
  width: 100%;
  aspect-ratio: 1;
}

.card__title {
  margin: 0;
  font-size: 20px;
  font-weight: bold;
  transform-origin: 0 0;
  line-height: 1;
}

.card--expanded .card__title {
  font-size: 30px;
}

.card__header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px 14px;
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
}

.card--expanded .card__header {
  flex-direction: row;
}

.card__user-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}

.card--expanded .card__user-info {
  align-items: flex-start;
  gap: 2px 0;
}

.card__user-links {
  list-style: none;
  margin: 0;
  padding: 0;
  height: 0;
  pointer-events: none;
  opacity: 0;
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 0 14px;
}

.card--expanded .card__user-links {
  position: static;
  opacity: 1;
  height: auto;
  margin-top: 5px;
  pointer-events: all;
}

.card__user-link {
  display: flex;
}

.card__user-link-icon {
  fill: currentColor;
  color: white;
  width: 20px;
}

.card__bio {
  opacity: 0;
  height: 0;
  transform-origin: 0 0;
}

.card--expanded .card__bio {
  max-width: 800px;
  margin: 20px auto 0;
  opacity: 1;
  height: auto;
}

.card__close {
  position: absolute;
  right: -40px;
  top: 20px;
  z-index: 10;
  opacity: 0;
  pointer-events: none;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  width: 44px;
  height: 44px;
  color: white;
  padding: 10px;
}

.card--expanded .card__close {
  transition: 0.3s all ease;
  transition-delay: 0.3s;
  opacity: 1;
  pointer-events: all;
  transform: translateX(-100%) translateX(-20px);
}

.card--animatable .card__user-image,
.card--animatable .card__title,
.card--animatable .card__subtitle,
.card--animatable .card__user-links,
.card--animatable .card__bio,
.card--animatable .card__images,
.card--animatable .card__content {
  transition: all 0.5s cubic-bezier(0, 0, 0.21, 1);
}

@media (min-width: 520px) {
  .cards {
    grid-template-columns: 1fr 1fr;
  }

  .card__images {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  }
}

@media (min-width: 768px) {
  .cards {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .card__images {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}
!

JS 

              
                /***********************
 *      Variables       *
 ***********************/

let expandedCard
let initialProperties = []
let finalProperties = []
let cardClip

/***********************
 *    Helper Functions   *
 ***********************/

function getAnimatableElements() {
  if (!expandedCard) return
  return expandedCard.querySelectorAll('.js-animatable')
}

function getCardContent() {
  if (!expandedCard) return
  return expandedCard.querySelector('.card__content')
}

/***********************
 *        Setup        *
 ***********************/

function setup() {
  document.addEventListener('click', (e) => {
    if (expandedCard) return

    if (e.target.matches('.js-card')) {
      expandedCard = e.target
    } else if (e.target.closest('.js-card')) {
      expandedCard = e.target.closest('.js-card')
    }

    if (!expandedCard) return

    const closeButton = expandedCard.querySelector('.js-close-button')
    closeButton.addEventListener('click', collapse)

    expand()
  })
}

/********************
 *      Expand      *
 ********************/
function expand() {
  getCardContent().addEventListener('transitionend', onExpandTransitionEnd)

  disablePageScroll()
  collectInitialProperties()

  expandedCard.classList.add('card--expanded')

  collectFinalProperties()

  setInvertedTransformAndOpacity()
  clipCardContent()

  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      expandedCard.classList.add('card--animatable')
      startExpanding()
    })
  })
}

function collectInitialProperties() {
  for (const element of getAnimatableElements()) {
    initialProperties.push({
      rect: element.getBoundingClientRect(),
      opacity: parseFloat(window.getComputedStyle(element).opacity)
    })
  }

  const cardRect = expandedCard.getBoundingClientRect()
  cardClip = {
    top: cardRect.top,
    right: window.innerWidth - cardRect.right,
    bottom: window.innerHeight - cardRect.bottom,
    left: cardRect.left
  }
}

function collectFinalProperties() {
  const elements = getAnimatableElements()
  for (const element of elements) {
    finalProperties.push({
      rect: element.getBoundingClientRect(),
      opacity: parseFloat(window.getComputedStyle(element).opacity)
    })
  }
}

function setInvertedTransformAndOpacity() {
  const elements = getAnimatableElements()
  for (const [i, element] of elements.entries()) {
    element.style.transform = `translate(${
      initialProperties[i].rect.left - finalProperties[i].rect.left
    }px, ${
      initialProperties[i].rect.top - finalProperties[i].rect.top
    }px) scale(${
      initialProperties[i].rect.width / finalProperties[i].rect.width
    })`

    element.style.opacity = `${initialProperties[i].opacity}`
  }
}

function clipCardContent() {
  getCardContent().style.clipPath = `
    inset(${cardClip.top}px ${cardClip.right}px ${cardClip.bottom}px ${cardClip.left}px round 5px)
  `
}

function startExpanding() {
  for (const [i, element] of getAnimatableElements().entries()) {
    element.style.transform = 'translate(0, 0) scale(1)'
    element.style.opacity = `${finalProperties[i].opacity}`
  }

  getCardContent().style.clipPath = 'inset(0)'
}

function onExpandTransitionEnd(e) {
  const cardContent = getCardContent()
  if (e.target !== cardContent) return

  expandedCard.classList.remove('card--animatable')
  cardContent.removeEventListener('transitionend', onExpandTransitionEnd)
  removeStyles()
}

function removeStyles() {
  for (const element of getAnimatableElements()) {
    element.style = null
  }

  getCardContent().style = null
}

/**********************
 *      Collapse      *
 **********************/

function collapse() {
  getCardContent().addEventListener('transitionend', onCollapseTransitionEnd)

  setCollapsingInitialStyles()

  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      expandedCard.classList.add('card--animatable')
      startCollapsing()
    })
  })
}

function setCollapsingInitialStyles() {
  for (const element of getAnimatableElements()) {
    element.style.transform = `translate(0, 0) scale(1)`
  }

  getCardContent().style.clipPath = 'inset(0)'
}

function startCollapsing() {
  setInvertedTransformAndOpacity()
  clipCardContent()
}

function onCollapseTransitionEnd(e) {
  const cardContent = getCardContent()
  if (e.target !== cardContent) return

  expandedCard.classList.remove('card--animatable')
  expandedCard.classList.remove('card--expanded')

  cardContent.removeEventListener('transitionend', onCollapseTransitionEnd)

  removeStyles()
  enablePageScroll()

  cleanup()
}

function disablePageScroll() {
  document.body.style.overflow = 'hidden'
}

function enablePageScroll() {
  document.body.style.overflow = ''
}

function cleanup() {
  expandedCard = null
  cardClip = null
  initialProperties = []
  finalProperties = []
}

/***********************
 *      Start Here     *
 ***********************/

setup()
!
999px

Console