CSS 中的打字动画超出指定限制

Question

打字动画每次都停在设定的字符数处。如果我扩展声明，它就会中断。如果我缩短语句，它会一直运行直到达到设置的字符数。我知道我必须更改步数 (50)，但这并不是它停止的真实数字，它停止在 28.

@import url('https://fonts.googleapis.com/css2?family=Courier+Prime&family=Source+Code+Pro:wght@200&display=swap');
html {
  min-height: 100%;
  overflow: hidden;
}

body {
  height: calc(100vh - 8em);
  padding: 0;
  margin: 0;
  color: #FFF;
  font-family: 'Courier Prime', monospace;
  background-color: rgb(0, 0, 0);
}

.video-bg {
  position: absolute;
  top: 0;
  left: 0;
  min-width: 100%;
  min-height: 100%;
  opacity: .5;
}

.line {
  position: relative;
  top: 75%;
  width: 24em;
  margin: auto;
  border-right: 2px solid #FFF;
  font-size: 18px;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  transform: translateY(-50);
}

.anim-typewriter {
  animation: typewriter 5s steps(50) 1s 1 normal both, blinkTextCursor 750ms steps(40) infinite normal;
}

@keyframes typewriter {
  from {
    width: 0;
  }
  to {
    width: 16em;
  }
}

@keyframes blinkTextCursor {
  from {
    border-right-color: transparent;
  }
  to {
    border-right-color: rgb(155, 211, 71);
  }
}

<p class="line anim-typewriter">Under construction...</p>

Answer 1

您可以通过在此处减小宽度参数来调整关键帧的结束位置：

@keyframes typewriter {
  from {
    width: 0;
  }
  to {
    width: 16em;
  }
}

将宽度更改为 13em，光标将在字符串末尾闪烁：

@import url('https://fonts.googleapis.com/css2?family=Courier+Prime&family=Source+Code+Pro:wght@200&display=swap');
html {
  min-height: 100%;
  overflow: hidden;
}

body {
  height: calc(100vh - 8em);
  padding: 0;
  margin: 0;
  color: #FFF;
  font-family: 'Courier Prime', monospace;
  background-color: rgb(0, 0, 0);
}

.video-bg {
  position: absolute;
  top: 0;
  left: 0;
  min-width: 100%;
  min-height: 100%;
  opacity: .5;
}

.line {
  position: relative;
  top: 75%;
  width: 24em;
  margin: auto;
  border-right: 2px solid #FFF;
  font-size: 18px;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  transform: translateY(-50);
}

.anim-typewriter {
  animation: typewriter 5s steps(50) 1s 1 normal both, blinkTextCursor 750ms steps(40) infinite normal;
}

@keyframes typewriter {
  from {
    width: 0;
  }
  to {
    width: 13em;
  }
}

@keyframes blinkTextCursor {
  from {
    border-right-color: transparent;
  }
  to {
    border-right-color: rgb(155, 211, 71);
  }
}

<p class="line anim-typewriter">Under construction...</p>

这是最简单的方法，但将来如果您有动态大小的字符串，您希望根据字符串长度（字符数）更新宽度。