{
  "schemaVersion": 1,
  "sourceKind": "authored-spec",
  "provenance": "authored-in-repo",
  "specFile": "spec/移动端规格.md",
  "specSection": "38 · 分段器 Segmented",
  "confidence": "high",
  "slug": "mobile-segmented",
  "name": "分段器 Segmented",
  "semanticTypeCandidates": [
    "segmented-control",
    "tab-switcher",
    "radio-group"
  ],
  "variantDimensions": [
    {
      "name": "size",
      "values": [
        "default",
        "small"
      ]
    },
    {
      "name": "block",
      "values": [
        "false",
        "true"
      ]
    }
  ],
  "representativeVariants": [
    {
      "size": "default",
      "block": "false",
      "label": "三项基础（44px 高，宽度随内容）"
    },
    {
      "size": "default",
      "block": "true",
      "label": "等分铺满（与筛选条同宽）"
    },
    {
      "size": "small",
      "block": "false",
      "label": "小尺寸（32px 高，卡片内次级筛选）"
    }
  ],
  "anatomy": {
    "segmented": "容器，浅底 + 内边距，横向排列选项；role=\"radiogroup\" 并带 aria-label 说明这组在选什么",
    "item": "单个选项，原生 button + role=\"radio\"（整项可点、可键盘聚焦），data-value 携带取值",
    "label": "选项文字（可含装饰图标，图标 aria-hidden 由文字承担语义）"
  },
  "structurePatterns": {
    "size": "default 44px / small 32px（卡片内次级筛选）",
    "block": "false 宽度随内容 / true 占满容器且各项等分",
    "状态类": "is-active 选中 / is-disabled 整段禁用"
  },
  "usageHints": [
    "在 2~5 个互斥选项里选一个，并让「当前选的是哪个」一眼可见（订单状态、时间范围、列表/网格视图切换）",
    "触屏没有悬停预告，所以选中项必须靠形态（白底滑块 + 阴影）而非色相区分",
    "选中态是视觉与属性的双向同步：除类名外必须同时更新 aria-checked",
    "选中项再次点击不重复触发 change（值未变不发事件）",
    "受控：组件不存值，只回传目标值 change；宿主不采纳时视觉不变化"
  ],
  "doNotInvent": [
    "多选（同时选中多个）—— 需要多选时改用标签组或多选框",
    "选项的横向滚动、换行与「更多」折叠（超过 5 个应换组件）",
    "选中项的下划线滑块动画（那是标签栏的视觉语言，不是分段器）",
    "选项禁用条件与业务权限的判断"
  ],
  "unknowns": [
    "选项数量上限是否应硬约束在 5 个（当前只写建议，不做运行时拦截）",
    "size=small 的命中区是否需要在纵向自动补到 44px",
    "是否需要「滑动经过即选中」（当前只认轻点，滑动不选中）"
  ],
  "interaction": [
    "选项切换是一次轻点：点击后该项 is-active、同组其它项复位；不响应长按、双击与拖动",
    "选中态是视觉与属性的双向同步：除类名外必须同时更新 aria-checked",
    "每项热区高 ≥ 44px（size=small 时视觉 32px，但触摸命中区仍按 44px 计，纵向不留死区）",
    "选中项再次点击不重复触发 change（值未变不发事件）",
    "切换动效 120ms（--kole-duration-fast），prefers-reduced-motion 下瞬时切换"
  ],
  "accessibility": [
    "容器 role=\"radiogroup\" + aria-label；每个选项原生 button + role=\"radio\" + aria-checked",
    "选项名称由文字承担；装饰性图标必须 aria-hidden=\"true\"",
    "禁用时容器补 aria-disabled=\"true\"，选项用原生 disabled",
    "键盘：Tab 进入分组，左右方向键在选项间移动并选中"
  ],
  "api": {
    "source": "implementation",
    "note": "props / events / slots 为 6 端实现的公共接口（说明文字取自规格对应小节）。字段名与各端源码逐名核对：node tools/verify-mobile-docs.mjs",
    "requiredNote": "「必传」按严格定义：实现里**没有默认值**时才为 Y（本门禁逐条核对 props 与各端源码的默认值，防止契约与实现脱节）。",
    "props": [
      {
        "name": "value",
        "type": "string",
        "default": "''",
        "desc": "当前选中值（受控；与选项的 data-value 对应）（规格 §38.5）",
        "required": false
      },
      {
        "name": "options",
        "type": "Array<{ value, label, disabled? }>",
        "default": "[]",
        "desc": "选项列表，2~5 个（规格 §38.2 item）",
        "required": false
      },
      {
        "name": "size",
        "type": "'default' | 'small'",
        "default": "'default'",
        "desc": "变体 size：default 44px / small 32px（规格 §38.3）",
        "required": false
      },
      {
        "name": "block",
        "type": "boolean",
        "default": "false",
        "desc": "变体 block：占满容器且各项等分（规格 §38.3）",
        "required": false
      },
      {
        "name": "disabled",
        "type": "boolean",
        "default": "false",
        "desc": "整段禁用（规格 §38.4）",
        "required": false
      },
      {
        "name": "label",
        "type": "string",
        "default": "'分段选择'",
        "desc": "这组选项在选什么的说明，落到 aria-label（规格 §38.6）",
        "required": false
      }
    ],
    "events": [
      {
        "name": "change",
        "params": "(value: string)",
        "desc": "选中项变化时回传目标值；值未变不发事件（规格 §38.5）"
      }
    ],
    "slots": []
  },
  "variantClasses": {
    "size": {
      "default": [
        ".kole-m-segmented--default"
      ],
      "small": [
        ".kole-m-segmented--small"
      ]
    },
    "block": {
      "false": [],
      "true": [
        ".kole-m-segmented--block"
      ]
    }
  },
  "demos": [
    {
      "id": "basic",
      "group": "01 组件类型",
      "title": "基础用法",
      "desc": "三项互斥：选中项是白底滑块 + 品牌字色，靠形态而不是色相区分；容器 data-value 随选中同步。",
      "variant": "size=default"
    },
    {
      "id": "block",
      "group": "01 组件类型",
      "title": "等分铺满",
      "desc": "block=true：两项等分容器宽度，适合与筛选条同宽；选项少时也不出现半截空白。",
      "variant": "block=true"
    },
    {
      "id": "small",
      "group": "01 组件类型",
      "title": "小尺寸",
      "desc": "size=small：32px 高，用于卡片内的次级筛选；视觉更矮但命中区仍按 44px 计。",
      "variant": "size=small"
    },
    {
      "id": "icon-text",
      "group": "02 组件状态",
      "title": "带图标",
      "desc": "选项内容可含装饰图标；图标 aria-hidden，语义全部由文字承担，读屏不会读出符号。",
      "variant": "选项含图标"
    },
    {
      "id": "disabled",
      "group": "02 组件状态",
      "title": "禁用",
      "desc": "整段置灰且不响应：选中项也不再高亮，点击与键盘都不改值，读屏播报不可用。",
      "variant": "disabled=true"
    }
  ],
  "related": [
    {
      "slug": "tabbar",
      "why": "切换的是页面级内容区且选项 ≥ 4 个时用底部标签栏，分段器只用于同一区块内的轻量切换"
    },
    {
      "slug": "mobile-tag",
      "why": "多选筛选条件用标签组（可同时选中多个），分段器只表达单选"
    },
    {
      "slug": "mobile-radio",
      "why": "选项需要文字说明或纵向排列时用单选框列表，横向挤在一行才用分段器"
    }
  ]
}