Simulate a flashing text cursor in HTML

Question

What's a good way to insert a flashing cursor (e.g. a flashing thick underscore in DOS or vertical bar in Linux) in HTML?

This character/image would be trailing the H1 header and should look good at different sizes.

Answer 1

You can do this with just CSS, here is vertical bar Fiddle

h1 {
  font-size: 20px;
  padding-right: 20px;
  display: inline-block;
}

h1:after {
  content: '';
  width: 20px;
  height: 2px;
  background: black;
  opacity: 0;
  display: inline-block;
  animation: blink 1s linear infinite alternate;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

<h1>Lorem ipsum dolor sit amet</h1>

Or you can use JQuery and setInterval

setInterval(function() {
  $('span').animate({
    opacity: 1
  }, 600).animate({
    opacity: 0
  }, 600)
}, 1200);

h1 {
  font-size: 20px;
  padding-right: 20px;
  display: inline-block;
}

h1 span {
  width: 20px;
  margin-bottom: -1px;
  height: 2px;
  background: black;
  opacity: 0;
  display: inline-block;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h1>Lorem ipsum dolor sit amet <span></span></h1>