Info panels with closing action

Info panels with closing action developed using css, html and javascript.

HTML Snippet

<svg xmlns="http://www.w3.org/2000/svg" style="height: 0; display: none;">
  <symbol id="warning" viewBox="0 0 24 24">
    <path d="M1 21h22L12 2 1 21zm12-3h-2v-2h2v2zm0-4h-2v-4h2v4z"></path>
    <path d="M0 0h24v24H0z" fill="none"></path>
  </symbol>
  <symbol id="cross" viewBox="0 0 24 24">
    <path d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"></path>
    <path d="M0 0h24v24H0z" fill="none"></path>
  </symbol>
</svg>

<div class="info-panel" data-info-panel=".button">
    <svg class="icon"><use xlink:href="#warning"></use></svg>
    <div class="info-panel__content">
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit totam, eaque explicabo doloremque consequuntur quas blanditiis quam, praesentium ratione tempore et voluptatem eveniet earum necessitatibus neque incidunt minus recusandae!</p>
    </div>
    <button class="button  button--icon"><svg class="button__icon  icon"><use xlink:href="#cross"></use></svg></button>
</div>

<div class="info-panel  info-panel--warning" data-info-panel=".button">
    <svg class="icon"><use xlink:href="#warning"></use></svg>
    <div class="info-panel__content">
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit totam, eaque explicabo doloremque consequuntur quas blanditiis quam, praesentium ratione tempore et voluptatem eveniet earum necessitatibus neque incidunt minus recusandae!</p>
    </div>
    <button class="button  button--icon"><svg class="button__icon  icon"><use xlink:href="#cross"></use></svg></button>
</div>

CSS Code

:root {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  font-size: 16px;
  line-height: 1.6;
  --color-white: #ffffff;
  --color-background-info: #0070D2;
  --color-content-light: white;
  --color-hover-tint: rgba(0,0,0,0.1);
  --color-warning: #C23934;
}

* {
	box-sizing: border-box;
}

body {
	padding: 2rem;
}

p {
	margin-top: 0;
}

.info-panel {
  padding: 1rem;
  background: var(--color-background-info);
  color: var(--color-content-light);
  display: flex;
  align-items: flex-start;
  border-radius: .4rem;
  transition: .4s;
  & + & { margin-top: 1rem; }
  &__content {
    flex: 1;
    padding: 0 1rem;
  }
  &--warning {
    background: var(--color-warning);
  }
  &--success {
    background: var(--color-success);
  }
  &--closed {
	opacity: 0;
	padding-top: 0;
	padding-bottom: 0;
	pointer-events: none;
	visibility: hidden;
	height: 0;
	animation: height .4s linear;
  }
}

@keyframes height { from { height: var(--initialHeight) } }

button,
.button {
  cursor: pointer;
  border: none;
  background: var(--color-action);
  color: var(--color-content-light);
  padding: .6em 1.2em;
  text-decoration: none;
  border-radius: .2em;
  font-weight: lighter;
  font-size: inherit;
  line-height: inherit;
  transition: .2s;
  box-shadow: inset 0 0 0 2rem transparent;
  &:hover {
    box-shadow: inset 0 0 0 2rem var(--color-hover-tint);
  }
  &--icon {
    padding: 0;
    background: none;
    font-size: 0;
    border-radius: .2rem;
  }
}

.icon {
  fill: currentColor;
  width: 2rem;
  height: 2rem;
  &--success {
    border-radius: .2rem;
    background: var(--color-success);
  }
  &--warning {
    border-radius: .2rem;
    background: var(--color-warning);
  }
  &--pending {
    border-radius: .2rem;
    background: var(--color-pending);
  }
}

JavaScript Snippet

[...document.querySelectorAll('[data-info-panel]')].map(panel => {
	[...panel.querySelectorAll(panel.dataset.infoPanel)].map(controller => {
		controller.addEventListener('click', () => {
			panel.style.setProperty('--initialHeight', `${panel.getBoundingClientRect().height}px`);
			panel.classList.add("info-panel--closed");
		});
	});
});

Preview