<div class="container">
  <div class="hamburger">
    <div class="dash d1"></div>
    <div class="dash d2"></div>
    <div class="dash d3"></div>
  </div>
</div>

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

.container {
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  background: #333333;
  background: linear-gradient(to right, #0b41d4, #d60606);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hamburger {
  position: relative;
  padding: 10px;
  width: 80px;
  height: 80px;
  background-color: #111;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  border: 5px solid #fff;
  box-shadow: 0 0 15px 1px;
}

.dash {
  height: 10px;
  width: 50px;
  background-color: #fff;
  border-radius: 5px;
  position: absolute;
  left: 10px;
}

.d1 {
  top: 10px;
}

.d2 {
  top: 30px;
}

.d3 {
  top: 50px;
}

.clicked .d1 {
  animation-name: anim1, anim3;
  animation-duration: 300ms, 300ms;
  animation-delay: 0ms, 300ms;
  animation-timing-function: cubic-bezier(0.075, 0.82, 0.165, 1),
    cubic-bezier(0.39, 0.575, 0.565, 1);
  animation-fill-mode: none, forwards;
}

.clicked .d2 {
  animation: anim1 300ms ease forwards;
}

.clicked .d3 {
  animation-name: anim1, anim2;
  animation-duration: 300ms, 300ms;
  animation-delay: 0ms, 300ms;
  animation-timing-function: cubic-bezier(0.075, 0.82, 0.165, 1),
    cubic-bezier(0.39, 0.575, 0.565, 1);
  animation-fill-mode: none, forwards;
}

@keyframes anim1 {
  0% {
    width: 50px;
  }

  99% {
    opacity: 1;
  }

  100% {
    width: 0%;
    opacity: 0;
  }
}

@keyframes anim2 {
  0% {
    /* transform: translateY(20px) rotate(45deg); */
    /* width: 0px; */
    /* left: 0px; */
  }

  100% {
    transform: translateY(-20px) rotate(-45deg);
    width: 70px;
    left: 0px;
  }
}

@keyframes anim3 {
  0% {
    /* transform: translateY(-20px) rotate(45deg); */
    /* width: 0%; */
    /* left: 0px; */
  }

  100% {
    transform: translateY(20px) rotate(45deg);
    width: 70px;
    left: 0px;
  }
}

let hamburger = document.querySelector(".hamburger");

hamburger.addEventListener("click", () => {
  hamburger.classList.toggle("clicked");
});