【前端设计】输入框

  欢迎来到前端设计专栏，本专栏收藏了一些好看且实用的前端作品，使用简单的html、css语法打造创意有趣的作品，为网站加入更多高级创意的元素。

html

  


    
    
      




  
  
  
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 css

.wave-group {
  position: relative;
}

.wave-group .input {
  font-size: 16px;
  padding: 10px 10px 10px 5px;
  display: block;
  width: 200px;
  border: none;
  border-bottom: 1px solid #515151;
  background: transparent;
}

.wave-group .input:focus {
  outline: none;
}

.wave-group .label {
  color: #999;
  font-size: 18px;
  font-weight: normal;
  position: absolute;
  pointer-events: none;
  left: 5px;
  top: 10px;
  display: flex;
}

.wave-group .label-char {
  transition: 0.2s ease all;
  transition-delay: calc(var(--index) * .05s);
}

.wave-group .input:focus ~ label .label-char,
.wave-group .input:valid ~ label .label-char {
  transform: translateY(-20px);
  font-size: 14px;
  color: #5264AE;
}

.wave-group .bar {
  position: relative;
  display: block;
  width: 200px;
}

.wave-group .bar:before,.wave-group .bar:after {
  content: '';
  height: 2px;
  width: 0;
  bottom: 1px;
  position: absolute;
  background: #5264AE;
  transition: 0.2s ease all;
  -moz-transition: 0.2s ease all;
  -webkit-transition: 0.2s ease all;
}

.wave-group .bar:before {
  left: 50%;
}

.wave-group .bar:after {
  right: 50%;
}

.wave-group .input:focus ~ .bar:before,
.wave-group .input:focus ~ .bar:after {
  width: 50%;
}