JSFiddle - React, Tailwind, and code Playground

HTML

<div id="heart"></div>

CSS

#heart {
  position: relative;
  width: 100px;
  height: 90px;
  margin-top: 10px;
  /* leave some space above */
}

#heart:before {
  position: absolute;
  content: "";
  left: 50px;
  top: 0;
  width: 52px;
  height: 80px;
  background: red;
  /* assign a nice red color */
  border-radius: 50px 50px 0 0;
  /* make the top edge round */
}

#heart:before {
  -webkit-transform: rotate(-45deg);
  /* 45 degrees rotation counter clockwise */
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
  -webkit-transform-origin: 0 100%;
  /* Rotate it around the bottom-left corner */
  -moz-transform-origin: 0 100%;
  -ms-transform-origin: 0 100%;
  -o-transform-origin: 0 100%;
  transform-origin: 0 100%;
}

#heart:after {
  left: 0;
  /* placing the right part properly */
  -webkit-transform: rotate(45deg);
  /* rotating 45 degrees clockwise */
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
  -webkit-transform-origin: 100% 100%;
  /* rotation is around bottom-right corner this time */
  -moz-transform-origin: 100% 100%;
  -ms-transform-origin: 100% 100%;
  -o-transform-origin: 100% 100%;
  transform-origin: 100% 100%;
}