<!-------- Thanks Oleg Frolov for the reference  -------->
<!-- https://dribbble.com/shots/3395802-Menu-button-II -->

<div class="wrapper-menu">
  <div class="line-menu half start"></div>
  <div class="line-menu"></div>
  <div class="line-menu half end"></div>
</div>

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background-color: #000;
  display: flex;
  justify-content: center;
  align-items: center;
}

.wrapper-menu {
  width: 50px;
  height: 50px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  transition: transform 330ms ease-out;
}

.wrapper-menu.open {
  transform: rotate(-45deg);  
}

.line-menu {
  background-color: #fff;
  border-radius: 5px;
  width: 100%;
  height: 6px;
}

.line-menu.half {
  width: 50%;
}

.line-menu.start {
  transition: transform 330ms cubic-bezier(0.54, -0.81, 0.57, 0.57);
  transform-origin: right;
}

.open .line-menu.start {
  transform: rotate(-90deg) translateX(3px);
}

.line-menu.end {
  align-self: flex-end;
  transition: transform 330ms cubic-bezier(0.54, -0.81, 0.57, 0.57);
  transform-origin: left;
}

.open .line-menu.end {
  transform: rotate(-90deg) translateX(-3px);
}

var wrapperMenu = document.querySelector('.wrapper-menu');

wrapperMenu.addEventListener('click', function(){
  wrapperMenu.classList.toggle('open');  
})