Creating a Animated Menu Icon using css And Javascript

If we are not using an icon library, you can create a basic menu icon with CSS:

Animated Icon

Use CSS and JavaScript to change the menu icon to a “cancel/remove” icon when it is clicked on:

Step 1) Add HTML:
Example

<div class="container" onclick="myFunction(this)">
  <div class="bar1"></div>
  <div class="bar2"></div>
  <div class="bar3"></div>
</div>

Step 2) Add CSS:
Example

.container {
  display: inline-block;
  cursor: pointer;
}

.bar1, .bar2, .bar3 {
  width: 35px;
  height: 5px;
  background-color: #333;
  margin: 6px 0;
  transition: 0.4s;
}

/* Rotate first bar */
.change .bar1 {
  transform: translate(0, 11px) rotate(-45deg);
}

/* Fade out the second bar */
.change .bar2 {opacity: 0;}

/* Rotate last bar */
.change .bar3 {
  transform: translate(0, -11px) rotate(45deg);
}

Step 3) Add JavaScript:
Example

function myFunction(x) {
  x.classList.toggle("change");
}

Explanation
HTML & CSS: We use the same styles as before, we wrap a container element around each <div> element and we specify a class name for each.

The container element is used to show a pointer symbol when the user moves the mouse over the divs (bars). When it is clicked on, it will execute a JavaScript function that adds a new class name to it, which will change the styles of each horizontal bar: the first and the last bar is transformed and rotated to the letter “x”. The bar in the middle fades out and becomes invisible.