tu-view-plus/es/src/textarea/style/textarea.css

.tu-textarea {
  position: relative;
  display: inline-block;
  width: 100%;
  vertical-align: middle;
  font-size: var(--tu-font-size, 14px);
}
.tu-textarea:hover:not(.is-disabled) .tu-textarea__inner {
  box-shadow: none;
  border-color: var(--tu-color-shadow-light, #ffffff);
}

.tu-textarea__inner {
  position: relative;
  display: block;
  resize: vertical;
  padding: 0 12px;
  height: 30px;
  line-height: 30px;
  box-sizing: border-box;
  width: 100%;
  font-size: inherit;
  font-family: inherit;
  color: var(--tu-color-text, #71757f);
  background: transparent;
  background-image: none;
  border-radius: var(--tu-border-radius, 2px);
  transition: box-shadow var(--tu-transition-duration-3, 0.3s) ease;
  border: 1px solid transparent;
  box-shadow: inset 2px 2px 5px var(--tu-color-shadow-dark, #babbc0), inset -2px -2px 5px var(--tu-color-shadow-light, #ffffff);
  -webkit-appearance: none;
  scrollbar-width: thin;
  scrollbar-color: rgba(155, 159, 168, 0.7) transparent;
}
.tu-textarea__inner::-webkit-scrollbar {
  z-index: 111;
  width: 6px;
}
.tu-textarea__inner::-webkit-scrollbar:horizontal {
  height: 6px;
}
.tu-textarea__inner::-webkit-scrollbar-thumb {
  cursor: default;
  border-radius: 5px;
  width: 6px;
  background: rgba(155, 159, 168, 0.7);
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
}
.tu-textarea__inner::-webkit-scrollbar-thumb:hover {
  background: var(--tu-color-thumb, #9b9fa8);
}
.tu-textarea__inner::-webkit-scrollbar-corner {
  background-color: transparent;
}
.tu-textarea__inner::-webkit-scrollbar-track {
  background-color: transparent;
}
.tu-textarea__inner::-webkit-scrollbar-track-piece {
  background-color: transparent;
  width: 6px;
}
.tu-textarea__inner.is-focus {
  box-shadow: none;
  border-color: var(--tu-color-shadow-light, #ffffff);
}

.tu-textarea__inner:focus {
  outline: none;
}
.tu-textarea__inner::-moz-placeholder {
  color: var(--tu-color-text-placeholder, #9b9fa8);
}
.tu-textarea__inner::placeholder {
  color: var(--tu-color-text-placeholder, #9b9fa8);
}
.tu-textarea__inner::-moz-placeholder {
  color: var(--tu-color-text-placeholder, #9b9fa8);
}
.tu-textarea__inner::-ms-input-placeholder {
  color: var(--tu-color-text-placeholder, #9b9fa8);
}

.tu-textarea__suffix {
  display: flex;
  align-items: center;
  position: absolute;
  z-index: 0;
  float: right;
  font-size: 12px;
  right: 12px;
  color: var(--tu-color-text-placeholder, #9b9fa8);
  bottom: 9px;
}
.tu-textarea__count {
  position: relative;
  top: 0;
  margin-left: 8px;
  line-height: 1;
}

.tu-textarea__icon {
  position: relative;
  top: 0;
  cursor: pointer;
  transition: color var(--tu-transition-duration-3, 0.3s);
}
.tu-textarea__icon:hover {
  color: var(--tu-color-text, #71757f);
}

.tu-textarea__icon::before {
  width: 18px;
  height: 18px;
}

.tu-textarea.is-disabled {
  cursor: not-allowed;
}
.tu-textarea.is-disabled .tu-textarea__inner {
  box-shadow: none;
  opacity: 0.7;
  background-color: var(--tu-color-base-bg, rgba(128, 128, 128, 0.22));
  cursor: not-allowed;
}

.tu-textarea--mini .tu-textarea__inner {
  font-size: var(--tu-font-size-mini, 10px);
  height: 22px;
  line-height: 22px;
}

.tu-textarea--mini .tu-textarea__suffix {
  bottom: 3px;
}

.tu-textarea--mini .tu-textarea__icon::before {
  width: 14px;
  height: 14px;
}

.tu-textarea--small .tu-textarea__inner {
  font-size: var(--tu-font-size-small, 12px);
  height: 26px;
  line-height: 26px;
}

.tu-textarea--small .tu-textarea__suffix {
  bottom: 5px;
}

.tu-textarea--small .tu-textarea__icon::before {
  width: 16px;
  height: 16px;
}

.tu-textarea--medium .tu-textarea__inner {
  font-size: var(--tu-font-size-medium, 14px);
  height: 30px;
  line-height: 30px;
}

.tu-textarea--medium .tu-textarea__suffix {
  bottom: 9px;
}

.tu-textarea--medium .tu-textarea__icon::before {
  width: 18px;
  height: 18px;
}

.tu-textarea--large .tu-textarea__inner {
  font-size: var(--tu-font-size-large, 14px);
  height: 34px;
  line-height: 34px;
}

.tu-textarea--large .tu-textarea__suffix {
  bottom: 11px;
}

.tu-textarea--large .tu-textarea__icon::before {
  width: 18px;
  height: 18px;
}