滚动区域 · ScrollableArea

承载独立滚动内容，并演示边界、粘性区域和溢出行为。

安装与前置条件

npm install @astryxdesign/core@0.7.1 @astryxdesign/theme-neutral@0.7.1 @stylexjs/stylex@0.19.0

需要 React 19+，按顺序导入基础 CSS 和主题，并设置 Theme Provider。参见开始使用。

示例与使用方式

• 滚动区域 · 综合展示 / 滚动 1：首先体验这个示例，再查看代码理解组件的组合方式。
• 滚动区域 · 滚动 2：可交互查看这一用法的行为，复制代码时保留它实际使用的属性与导入。
• 滚动区域 · 滚动 3：可交互查看这一用法的行为，复制代码时保留它实际使用的属性与导入。
• 滚动区域 · 粘性布局 / 分组 / 滚动 4：可交互查看这一用法的行为，复制代码时保留它实际使用的属性与导入。
• 滚动区域 · 粘性布局 / 滚动 5：可交互查看这一用法的行为，复制代码时保留它实际使用的属性与导入。
• 滚动区域 · 滚动 6：可交互查看这一用法的行为，复制代码时保留它实际使用的属性与导入。

API 与上游详细参考

优先使用 0.7.1 官方中文说明；上游尚未提供中文的条目保留英文。属性名、类型及默认值保持原生 API，不把示例状态名称当成组件属性。

Scrollable Area

Provides a native scroll viewport and a real observed content box. The viewport enters the tab order only while a requested logical axis is effectively scrollable, and containment applies only to effective axes.

使用建议

• Give every area a concise label that identifies the content keyboard users will scroll.
• Choose inline, block, or both from content intent; the component maps the logical axes through writing mode and direction.
• Keep the default overscroll="allow" for nested areas unless the interaction deliberately needs containment.
• Use useScrollableArea instead when a component already owns both a viewport and a suitable content box, or when children must remain direct flex/grid items or retain a definite percentage block-size basis.
• ScrollableArea owns one normal block content box with a 100% minimum size. Inline and both-axis modes use max-content inline sizing, so intrinsic inline layout is intentionally wider than the viewport.
• Use logical padding props on the content box so nested full-bleed components receive the same inset geometry.
• Set isFullBleed only when the viewport itself should reach an ancestor container edge; it is off by default.
• Set stickyContainment="always" only when a fitting viewport should intentionally remain a Sticky boundary.
• 避免：Hide the native scrollbar without another visible and operable overflow affordance.
• 避免：Add another overflow wrapper around ScrollableArea; one native viewport should own scrolling.

主题 API

{
  "targets": [
    {
      "className": "astryx-scrollable-area",
      "visualProps": [
        "axis"
      ]
    }
  ]
}

组件结构

• Viewport: The root native scroll container, accessible name owner, focus target while effective, and astryx-scrollable-area theme target.
• Content box: A real inner layout box observed together with the viewport. For inline scrolling it uses max-content inline sizing with a 100% minimum.

示例的 StyleX 编译要求

ScrollableAreaOverscrollChaining、ScrollableAreaStickyGroupHeaders、ScrollableAreaStickyPassthrough 包含 stylex.create，需要配置 StyleX 源码编译流程。仅引入 Core 预编译 CSS 不足以运行这些示例样式，复制前请阅读样式与 Tailwind。