<div class="form-floating">
<textarea class="form-control" placeholder="Input without glow effect" id="demoTextAreaWithoutGlowEffect" maxlength="60"></textarea>
<label for="demoTextAreaWithoutGlowEffect">Input without glow effect on focus</label>
</div>

#demoTextAreaWithoutGlowEffect {
  border: none;
  overflow: auto;
  outline: none;
  -webkit-box-shadow: none;
  -moz-box-shadow: none;
  box-shadow: none;
}

#demoTextAreaWithoutGlowEffect:focus {
  background-color: rgba(255, 255, 255, 0.9);
  color: rgba(0, 0, 255, 0.9);
}