om/node_modules/bulma/sass/form/input-textarea.sass

%input-textarea
  @extend %input
  box-shadow: $input-shadow
  max-width: 100%
  width: 100%
  &[readonly]
    box-shadow: none
  // Colors
  @each $name, $pair in $colors
    $color: nth($pair, 1)
    &.is-#{$name}
      border-color: $color
      &:focus,
      &.is-focused,
      &:active,
      &.is-active
        box-shadow: $input-focus-box-shadow-size rgba($color, 0.25)
  // Sizes
  &.is-small
    +control-small
  &.is-medium
    +control-medium
  &.is-large
    +control-large
  // Modifiers
  &.is-fullwidth
    display: block
    width: 100%
  &.is-inline
    display: inline
    width: auto

.input
  @extend %input-textarea
  &.is-rounded
    border-radius: $radius-rounded
    padding-left: 1em
    padding-right: 1em
  &.is-static
    background-color: transparent
    border-color: transparent
    box-shadow: none
    padding-left: 0
    padding-right: 0

.textarea
  @extend %input-textarea
  display: block
  max-width: 100%
  min-width: 100%
  padding: 0.625em
  resize: vertical
  &:not([rows])
    max-height: 600px
    min-height: 120px
  &[rows]
    height: initial
  // Modifiers
  &.has-fixed-size
    resize: none