Fade in each li one by one

Question

I want to fade each nav li one by one. Here\'s my current code. It shows the whole div, now I want to fade in each li one by one with a slight dela

Answer 1

You can use an each() call to loop through the li elements and delay() the fadeIn() animation by an incremental amount. Try this:

$("#dropDownMenu li").each(function(i) {
    $(this).delay(100 * i).fadeIn(500);
});

.sub-menu {
    position: absolute;
    z-index: 1000;
    /* color: #fff;
    right: 5px; */
}

.sub-menu li {
    display: none;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="sub-menu" id="dropDownMenu">
    <ul id="navbar">
        <li> First</li>
        <li>Second</li>
        <li>Third</li>
        <li>Fourth</li>
        <li>Fifth</li>
    </ul>
</div>

If you want to increase/decrease the interval between items fading, change the value provided to the delay() method. In this example I used 100ms.

Answer 2

If you have a limited number of elements you could also consider using css-animations instead of a javascript solution. You can address each element using the nth-child selector and delay its animation according to its position. To make the animation stop at the end use the animation-fill-mode property.

li {
  opacity: 0;
  animation: fadeIn 0.9s 1;
  animation-fill-mode: forwards;
}

li:nth-child(5n+1) {
  animation-delay: 0.5s;
}

/*...*/

@keyframes fadeIn {
  0% {
    opacity: 0.0;
  }
  100% {
    opacity: 1.0;
  }
}

See this example and mind the prefixes https://jsfiddle.net/97bknLdu/

Answer 3

Do something like this with animation success callback

$(document).ready(function() {
  function fade(ele) {
    ele.fadeIn(500, function() { // set fade animation fothe emlement
      var nxt = ele.next(); // get sibling next to current eleemnt
      if (nxt.length) // if element exist
        fade(nxt); // call the function for the next element
    });
  }
  $("#circleMenuBtn").click(function() {
    fade($('#navbar li').eq(0)); // call the function with first element
  });
});

.sub-menu {
  left: 0;
  top: 0;
  position: relative;
  z-index: 1000;
  color: #000;
  right: 5px;
}
ul li {
  display: none;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="sub-menu" id="dropDownMenu">
  <ul id="navbar">
    <li>First</li>
    <li>Second</li>
    <li>Third</li>
    <li>Fourth</li>
    <li>Fifth</li>
  </ul>
</div>
<button id="circleMenuBtn">click</button>