【CSS】transitionを使用してテキストを一文字ずつスライドしながらフェードインをさせる方法 | デモページ

<div class="wrap">
  <p class="text">DummyText</p>
</div>

$(function(){
  $('.text').children().addBack().contents().each(function() {
      $(this).replaceWith($(this).text().replace(/(\S)/g, '<span class="text-move">$&</span>'));
  });
   setTimeout(function(){
      $(".text").addClass("active");
  },100);
});

.wrap {
  width: 768px;
  margin: 0 auto;
}
.text {
  margin: 50px 0 0;
  text-align: center;
  font-size: 100px;
}

.text-move {
  display: inline-block;
  opacity: 0;
  transform: translate(-50px);
  transition-property: all;
  transition-duration: .5s;
  transition-timing-function: ease;
  will-change: transform;
}

.text-move:nth-child(1) {
  transition-delay: 0s;
}
.text-move:nth-child(2) {
  transition-delay: 0.02s;
}
.text-move:nth-child(3) {
  transition-delay: 0.04s;
}
.text-move:nth-child(4) {
  transition-delay: 0.06s;
}
.text-move:nth-child(5) {
  transition-delay: 0.08s;
}
.text-move:nth-child(6) {
  transition-delay: 0.1s;
}
.text-move:nth-child(7) {
  transition-delay: 0.12s;
}
.text-move:nth-child(8) {
  transition-delay: 0.14s;
}
.text-move:nth-child(9) {
  transition-delay: 0.16s;
}
.text-move:nth-child(10) {
  transition-delay: 0.18s;
}
.text-move:nth-child(11) {
  transition-delay: 0.2s;
}
.text-move:nth-child(12) {
  transition-delay: 0.22s;
}

.text.active .text-move {
  opacity: 1;
  transform: translate(0);
}

@media screen and (max-width:640px){
  .wrap {
    width: 100%;
  }
  .text-move {
    font-size: 30px;
  }
}