Css List Gradual Fade In With Unknown Amount

I was trying to make a gradual fadein using normal CSS and no jquery on a list so it can fade in one-by-one. However, I only know how to do it in a limited amount of list. How do I

Solution 1:

Here is an idea using CSS variable that allow you to reduce the code. It's not generic but it's more easier to append a simple inline CSS to each li than writing complex CSS:

.ladder {
  opacity: 0;
  animation: fadeIn 1svar(--d) forwards;
}

@keyframes fadeIn {
  100% {
    opacity: 1;
  }
}

<ul><listyle="--d:0s"class="ladder">A</li><listyle="--d:0.2s"class="ladder">B</li><listyle="--d:0.4s"class="ladder">C</li><listyle="--d:0.6s"class="ladder">D</li><listyle="--d:0.8s"class="ladder">E</li></ul>

Here is another idea where you can apply an animation on the ul:

ul {
  position:relative;
}
ul:before {
  content:"";
  position:absolute;
  top:-20px;
  bottom:0;
  left:0;
  right:0;
  background:linear-gradient(to bottom,transparent,#fff20px);
  animation:fadeIn 2s forwards
}

@keyframes fadeIn {
  0% {
    top:-10px;
  }
  100% {
    top: 100%;
  }
}

<ul><li>A</li><li>B</li><li>C</li><li>D</li><li>E</li></ul>