@dialpad/dialtone-css/lib/build/less/components/resizable.less

Dialpad's design system

//
//  DIALTONE
//  COMPONENTS: RESIZABLE
//
//  Resizable panel layout component styles.
//  For further documentation of these and other classes,
//  visit https://dialtone.dialpad.com/components/resizable
//
//  TABLE OF CONTENTS
//  • RESIZABLE GROUP
//  • RESIZABLE PANEL
//  • RESIZABLE HANDLE
//
//  ============================================================================
//  $   RESIZABLE GROUP
//  ----------------------------------------------------------------------------
.d-resizable {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: clip;

  &--column {
    writing-mode: vertical-lr;
  }
}

//  ============================================================================
//  $   RESIZABLE PANEL
//  ----------------------------------------------------------------------------
.d-resizable-panel {
  position: absolute;
  inset-block: 0;
  overflow: hidden;

  &--collapsed {
    pointer-events: none;
  }

}

.d-resizable-panel__content {
  display: flex;
  flex: 1;
  align-items: start;
  width: 100%;
  height: 100%;
  pointer-events: auto;
  writing-mode: horizontal-tb;
}

//  ============================================================================
//  $   RESIZABLE HANDLE
//  ----------------------------------------------------------------------------
.d-resizable-handle {
  --d-resizable-handle-color-surface: var(--dt-color-border-focus);

  position: absolute;
  z-index: calc(var(--zi-navigation-fixed) + var(--zi-base1));
  background-color: transparent;
  border-radius: var(--dt-size-radius-pill);
  touch-action: none;

  // Logical properties handle both row/column via parent writing-mode
  inset-block: var(--dt-size-200);
  inline-size: var(--dt-size-300);

  // Invisible hit area for easier grabbing
  &::before {
    position: absolute;
    content: '';
    inset: var(--dt-size-400-negative);
  }

  // Cursor is the only direction-specific property
  &--row { cursor: ew-resize; }
  &--column { cursor: ns-resize; }

  // ─── State Modifiers ───
  &--disabled {
    background-color: transparent !important;
    cursor: default;
    opacity: var(--dt-opacity-500);
    pointer-events: none;
  }

  // ─── Indicator (visible drag line) ───
  &__indicator {
    position: absolute;
    background-color: transparent;
    border-radius: var(--dt-size-radius-pill);
    transition: background-color var(--td150) ease;
    inset: 0;
  }

  // ─── Hover ───
  &:hover:not(&--disabled) &__indicator,
  &--active &__indicator {
    background-color: var(--d-resizable-handle-color-surface);
  }

  // Remove browser default focus outline — custom indicators handle it
  &:focus {
    outline: none;
  }

  &:focus-visible {
    background-color: var(--d-resizable-handle-color-surface);
    box-shadow: none;
  }
}