HTML

CSS

JS

body {
  background: #1a1a1a;
}

.number-counter {
  color: #39ff14;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 20vh;
  transition: all 0.25s ease-in-out;
  text-shadow: 0px 0px 0px #39ff14, 0px 0px 0px #39ff14;
}

.number-counter::after {
  content: "";
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  position: absolute;
  opacity: 0;
  background: linear-gradient(to top, transparent 10%, #1a1a1a 10%, transparent 20%, #1a1a1a 20%, transparent 30%, #1a1a1a 30%, transparent 40%, #1a1a1a 40%, transparent 50%, #1a1a1a 50%, transparent 60%, #1a1a1a 60%, transparent 70%, #1a1a1a 70%, transparent 80%, #1a1a1a 80%, transparent 90%, #1a1a1a 90%, transparent 100%);
}

.number-counter.animated {
  filter: blur(2px);
  text-shadow: 10px 0px 5px #39ff14, -10px 0px 5px #39ff14;
}

.number-counter.animated::after {
  -webkit-animation: 0.05s slow-blink infinite;
  animation: 0.05s slow-blink infinite;
}

@-webkit-keyframes slow-blink {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slow-blink {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

Animated Neon Counter

This is an animated numeric neon counter built with HTML, CSS and JavaScript. This counter will start at 1 and end at the newNum defined in the JavaScript code.

You can change the color of the text by modifying CSS line 6 and its text shadow on CSS line 13.