BotFramework-WebChat/packages/fluent-theme/src/components/sendBox/TextArea.module.css at 93e8fab436a27ddc0a5177f89bfd622b357d6f22 · microsoft/BotFramework-WebChat · GitHub

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:global(.webchat-fluent) .sendbox__text-area {
  display: grid;
  grid-template-areas: 'main';
  max-height: 200px;
  overflow: auto;
  scrollbar-gutter: stable;
}

:global(.webchat-fluent) .sendbox__text-area--hidden {
  /* TODO: Not perfect way of hiding the text box. */
  height: 0;
  visibility: collapse;
}

:global(.webchat-fluent) .sendbox__text-area--in-completion {
  .sendbox__text-area-doppelganger {
    visibility: unset;
  }

  .sendbox__text-area-input {
    background-color: transparent;
    caret-color: var(--webchat-colorNeutralForeground1);
    color: transparent;
  }

  textarea::placeholder {
    color: transparent;
  }
}

:global(.webchat-fluent) .sendbox__text-area-shared {
  border: none;
  font: inherit;
  grid-area: main;
  outline: inherit;
  overflow-wrap: anywhere;
  resize: inherit;
}

:global(.webchat-fluent) .sendbox__text-area-doppelganger {
  overflow: visible;
  pointer-events: none;
  user-select: none;
  visibility: hidden;
  white-space: pre-wrap;
}

:global(.webchat-fluent) .sendbox__text-area-input {
  background-color: inherit;
  color: currentColor;
  contain: size;
  overflow: hidden;
  padding: 0;
}

:global(.webchat-fluent) .sendbox__text-area--scroll {
  /* Edge uses -webkit-scrollbar if scrollbar-* is not set */
  scrollbar-color: unset;
  scrollbar-width: unset;
  /* Firefox */
  -moz-scrollbar-color: var(--webchat-colorNeutralBackground5) var(--webchat-colorNeutralForeground2);
  -moz-scrollbar-width: thin;

  /* Chrome, Edge, and Safari */
  &::-webkit-scrollbar {
    width: 8px;
  }

  &::-webkit-scrollbar-track {
    background-color: var(--webchat-colorNeutralBackground5);
    border-radius: 16px;
  }

  &::-webkit-scrollbar-thumb {
    background-color: var(--webchat-colorNeutralForeground2);
    border-radius: 16px;
  }

  &::-webkit-scrollbar-corner {
    background-color: var(--webchat-colorNeutralBackground5);
  }
}