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CSS

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <main class="container">
	<figure>
		<img src="https://firebasestorage.googleapis.com/v0/b/fire-fotos-8e3f9.appspot.com/o/img%2Fmap.png?alt=media&token=82f7ebdc-7dad-43fb-ae79-da6d3a5285a4" class="map" alt="Map" title="Map">
		
		<figcaption>
			<i id="icon-map" class="fa fa-map-marker icon-map"></i>
			
			<div id="tooltip" class="tooltip">
				<div class="thumb">
					<img src="https://firebasestorage.googleapis.com/v0/b/fire-fotos-8e3f9.appspot.com/o/img%2Feiffel.png?alt=media&token=b7f8fce3-5199-431a-9740-efd27619e612" alt="Eiffel" title="Eiffel">
				</div>
				
				<div class="info-tooltip">
					<h3 class="title-tooltip">
						Torre Eiffel
					</h3>
					
					<p class="address-tooltip">
						Champ de Mars, 5 Avenue Anatole France, 75007 Paris, Francia
					<p>
					
					<p class="content-tooltip">
						La Torre Eiffel es el monumento más famoso de Paris y símbolo de la capital francesa.
					</p>
					
					<div class="ctn-btn-tooltip">
						<button type="button" class="btn-tooltip">
							Comprar Boletos	
						</button>
					</div>
				</div>
			</div>
		</figcaption>
	</figure>
</main>
!

CSS 

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

*:focus {
  outline: 0;
}

html {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

body {
	background-color: #efefef;
	font: normal 1rem 'Open Sans', sans-serif;
}

.container {
	align-items: center;
	display: flex;
	justify-content: center;
	margin: auto;
	max-width: 1000px;
	min-height: 100vh;
	width: 90%;
}

figure {
	position: relative;
	width: 100%;
}

figure .map {
	border-radius: 10px;
	box-shadow: 5px 5px 50px rgba(0, 0, 0, 0.2);
	vertical-align: top;
	width: 100%;
}

figure figcaption .icon-map {
	color: #ea4635;
	cursor: pointer;
	font-size: 40px;
	left: 55.3%;
	position: absolute;
	top: 32%;
}

figure figcaption .tooltip:before {
	border-left: 15px solid rgba(0, 0, 0, 0);
	border-right: 15px solid rgba(0, 0, 0, 0);
	border-top: 15px solid #ffffff;
	content: '';
	display: inline-block;
	left: calc(50% - 15px);
	position: absolute;
	top: 100%;
}

figure figcaption .tooltip {
	background-color: #ffffff;
	border-radius: 10px;
	box-shadow: 5px 5px 50px rgba(0, 0, 0, 0.2);
	display: flex;
	left: 0;
	opacity: 0;
	position: absolute;
	top: 0;
	transform: translate3d(0, 10px, 0);
	transition: opacity 0.3s ease,
							transform 0.3s ease;
	width: 31.25rem;
	z-index: 1;
}

figure figcaption .tooltip.active-tooltip {
	opacity: 1;
	transform: translate3d(0, 0, 0);
}

figure figcaption .tooltip .thumb {
	width: 40%;
}

figure figcaption .tooltip .thumb img {
	border-radius: 10px 0 0 10px;
	height: 100%;
	object-fit: cover;
	vertical-align: top;
	width: 100%;
}

figure figcaption .tooltip .info-tooltip {
	display: flex;
	flex-direction: column;
	justify-content: space-between;
	padding: 20px;
	width: 60%;
}

figure figcaption .tooltip .info-tooltip .title-tooltip {
	color: #3c48e5;
	font-weight: 600;
	margin-bottom: 10px;
}

figure figcaption .tooltip .info-tooltip .address-tooltip {
	color: #707070;
	font-size: 12px;
	margin-bottom: 20px;
}

figure figcaption .tooltip .info-tooltip .content-tooltip {
	margin-bottom: 20px;
}

figure figcaption .tooltip .info-tooltip .ctn-btn-tooltip {
	display: flex;
	justify-content: center;
}

figure figcaption .tooltip .info-tooltip .ctn-btn-tooltip .btn-tooltip {
	background-color: #75ac35;
	border-radius: 100px;
	border-style: none;
	color: #ffffff;
	cursor: pointer;
	font: 600 'Open Sans', sans-serif;
	padding: 10px 20px;
	transition: background-color 0.3s ease;
	width: 80%;
}

figure figcaption .tooltip .info-tooltip .ctn-btn-tooltip .btn-tooltip:hover,
figure figcaption .tooltip .info-tooltip .ctn-btn-tooltip .btn-tooltip:focus,
figure figcaption .tooltip .info-tooltip .ctn-btn-tooltip .btn-tooltip:active {
	background-color: rgba(117, 172, 53, 0.9);
}

/* Mediaqueries */
@media screen and (max-width: 768px) {
	figcaption .tooltip {
		font-size: 12px;
	}
	
	figure figcaption .tooltip .info-tooltip .ctn-btn-tooltip .btn-tooltip {
		width: 100%;
	}
	
}

@media screen and (max-width: 550px) {
	figure .map {
		margin-bottom: 40px;
	}
	
	figure figcaption .icon-tooltip {
		top: 0;
	}
	
	figure figcaption .tooltip:before {
		display: none;
	} 
	
	figure figcaption .tooltip {
		opacity: 1;
		position: static;
		transform: translate3d(0);
		width: 100%;
	}
	
}
!

JS 

              
                const iconMap = document.getElementById('icon-map');
const tooltip = document.getElementById('tooltip');

const calculatePosTooltip = () => {
	// Calculamos las coordenadas del icono
	const iconMapX = iconMap.offsetLeft;
	const iconMapY = iconMap.offsetTop;
	
	// Calculamos el tamaño del tooltip
	const widthTooltip = tooltip.clientWidth;
	const heightTooltip = tooltip.clientHeight;

	// Calculamos donde posicionamos el tooltip
	const positionX = iconMapX - (widthTooltip / 2) + 15;
	const positionY = iconMapY - heightTooltip - 20;

	tooltip.style.left = `${positionX}px`;
	tooltip.style.top = `${positionY}px`;
};

window.addEventListener('load', () => calculatePosTooltip() );
window.addEventListener('resize', () => calculatePosTooltip() );

iconMap.addEventListener('mouseenter', () => {
	tooltip.classList.add('active-tooltip');
	calculatePosTooltip();
});

let timer;
iconMap.addEventListener('mouseleave', () => {
	timer = setTimeout( () => {
		tooltip.classList.remove('active-tooltip');
	}, 500);
});

tooltip.addEventListener('mouseenter', () => clearTimeout(timer) );

tooltip.addEventListener('mouseleave', () => tooltip.classList.remove('active-tooltip') );
!
999px

Console