Existe-t-il un moyen d'ajouter lentement des lettres au texte par css?

Question

Je veux afficher un mot (supposons que Slow), y a-t-il un moyen d'afficher d'abord `` lent '' puis par animation CSS ajouter quelques O au milieu, faisant de Slow à Sloooooow.

J'utilise le dernier chrome, donc toutes les fonctionnalités CSS3 / HTML5 sont les bienvenues.

Answer 1

Vous pouvez envisager d'animer la largeur maximale d'une travée comme ci-dessous.

 .slow {
  display: inline-block;
  vertical-align: bottom;
  max-width: 0.5rem;
  overflow: hidden;
  animation: slow 2s ease forwards;
}

@keyframes slow {
  from {
    max-width: 0.5rem;
  }
  to {
    max-width: 3rem;
  }
}

 <span>Sl</span><span class="slow">oooooo</span><span>w</span>

Answer 2

Juste pour le plaisir, voici une solution en véritable CSS pur (c'est-à-dire ne nécessitant qu'un seul élément HTML), en utilisant la propriété CSS content

 .expanding-slow::before {
  content: "Slo";
  animation: expand-slow linear 3s both;
}
.expanding-slow::after { content: "w"; }
@keyframes expand-slow {
  0% { content: "Slo"; }
  20% { content: "Sloo"; }
  40% { content: "Slooo"; }
  60% { content: "Sloooo"; }
  80% { content: "Slooooo"; }
  100% { content: "Sloooooo"; }
}

.expanding-slow--smooth::before {
  display: inline-block;
  content: "Sloooooo";
  max-width: 3ch;
  overflow: hidden;
  vertical-align: text-top;
  animation: expand-slow--smooth linear 3s both;
}
.expanding-slow--smooth::after { content: "w"; }
@keyframes expand-slow--smooth {
  0% { max-width: 3ch; }
  100% { max-width: 8ch; }
}

 Using <code>content</code>:
<p class="expanding-slow"></p>

Using <code>max-width</code>:
<p class="expanding-slow--smooth"></p>

Answer 3

Voici une version révisée de la réponse de @DarioSanchezMartinez qui correspond un peu plus à vos spécifications.

 /* Taken from http://animista.net/play/entrances/fade-in */


#animate-1 {
	-webkit-animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
	        animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
          
}

#animate-2 {
	-webkit-animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
	        animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
          animation-delay: 1s;
}

#animate-3 {
	-webkit-animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
	        animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
          animation-delay: 2s;
}

#animate-4 {
	-webkit-animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
	        animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
          animation-delay: 3s;
}
@-webkit-keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

 SL<span id="animate-1">o</span><span id="animate-2">o</span><span id="animate-3">o</span><span id="animate-4">o</span>W

Answer 4

Oui!

 /* Taken from http://animista.net/play/entrances/fade-in */


#animate-1 {
	-webkit-animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
	        animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
          
}

#animate-2 {
	-webkit-animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
	        animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
          animation-delay: 1s;
}

#animate-3 {
	-webkit-animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
	        animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
          animation-delay: 2s;
}

#animate-4 {
	-webkit-animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
	        animation: fade-in 1.2s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
          animation-delay: 3s;
}
@-webkit-keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

 <h1 id="animate-1">S</h1>
<h1 id="animate-2">L</h1>
<h1 id="animate-3">O</h1>
<h1 id="animate-4">W</h1>