{
  "slug": "file-system-access",
  "name": "File System Access API",
  "category": "Capabilities",
  "summary": "Read and write to the user's local file system with explicit permission.",
  "name_zh": "File System Access API（文件系统访问）",
  "summary_zh": "在明确授权下读写用户的本地文件系统。",
  "spec_url": "https://wicg.github.io/file-system-access/",
  "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/File_System_API",
  "confidence": "medium",
  "verified_at": "2026-06-24",
  "support": [
    {
      "target": "Chrome (Android)",
      "os": "Android",
      "browser": "chrome",
      "engine": "blink",
      "status": "no",
      "version_added": null,
      "version_full": null,
      "applicable": true,
      "notes": [
        {
          "text": "showOpenFilePicker/showSaveFilePicker are not exposed on Android.",
          "text_zh": "Android 上不暴露 showOpenFilePicker / showSaveFilePicker。"
        }
      ],
      "source": "https://developer.mozilla.org/en-US/docs/Web/API/Window/showOpenFilePicker",
      "verified_at": "2026-06-24",
      "confidence": "medium"
    },
    {
      "target": "Chrome (Desktop)",
      "os": "Desktop",
      "browser": "chrome",
      "engine": "blink",
      "status": "yes",
      "version_added": "86",
      "version_full": "86",
      "applicable": true,
      "notes": [],
      "source": "https://developer.mozilla.org/en-US/docs/Web/API/Window/showOpenFilePicker",
      "verified_at": "2026-06-24",
      "confidence": "medium"
    },
    {
      "target": "Edge (Desktop)",
      "os": "Desktop",
      "browser": "edge",
      "engine": "blink",
      "status": "yes",
      "version_added": "86",
      "version_full": "86",
      "applicable": true,
      "notes": [],
      "source": "https://developer.mozilla.org/en-US/docs/Web/API/Window/showOpenFilePicker",
      "verified_at": "2026-06-24",
      "confidence": "medium"
    },
    {
      "target": "Safari (iOS)",
      "os": "iOS",
      "browser": "safari",
      "engine": "webkit",
      "status": "no",
      "version_added": null,
      "version_full": null,
      "applicable": true,
      "notes": [
        {
          "text": "Only the origin-private file system (OPFS) is available, not the user-visible picker.",
          "text_zh": "仅提供源私有文件系统（OPFS），没有用户可见的文件选择器。"
        }
      ],
      "source": "https://developer.mozilla.org/en-US/docs/Web/API/File_System_API",
      "verified_at": "2026-06-24",
      "confidence": "medium"
    },
    {
      "target": "Safari (macOS)",
      "os": "macOS",
      "browser": "safari",
      "engine": "webkit",
      "status": "no",
      "version_added": null,
      "version_full": null,
      "applicable": true,
      "notes": [
        {
          "text": "No showOpenFilePicker; OPFS only.",
          "text_zh": "没有 showOpenFilePicker；仅 OPFS。"
        }
      ],
      "source": "https://developer.mozilla.org/en-US/docs/Web/API/File_System_API",
      "verified_at": "2026-06-24",
      "confidence": "medium"
    },
    {
      "target": "Firefox (Desktop)",
      "os": "Desktop",
      "browser": "firefox",
      "engine": "gecko",
      "status": "no",
      "version_added": null,
      "version_full": null,
      "applicable": true,
      "notes": [
        {
          "text": "OPFS only; no user-visible file picker access.",
          "text_zh": "仅 OPFS；无法访问用户可见的文件选择器。"
        }
      ],
      "source": "https://developer.mozilla.org/en-US/docs/Web/API/File_System_API",
      "verified_at": "2026-06-24",
      "confidence": "medium"
    },
    {
      "target": "Samsung Internet",
      "os": "Android",
      "browser": "samsung",
      "engine": "blink",
      "status": "no",
      "version_added": null,
      "version_full": null,
      "applicable": true,
      "notes": [
        {
          "text": "The picker methods (`showOpenFilePicker`, `showSaveFilePicker`, `showDirectoryPicker`) are desktop-only in Chromium; Chrome for Android has no implementation for Samsung Internet to mirror (MDN compatibility table, checked 2026-10-03).",
          "text_zh": "选择器方法（`showOpenFilePicker`、`showSaveFilePicker`、`showDirectoryPicker`）在 Chromium 中仅限桌面端；Chrome for Android 没有实现，Samsung Internet 也就无从镜像（MDN 兼容性表，2026-10-03 核对）。"
        }
      ],
      "source": "https://developer.mozilla.org/en-US/docs/Web/API/Window/showOpenFilePicker",
      "verified_at": "2026-06-24",
      "confidence": "medium"
    }
  ],
  "biz_compat": [],
  "generated_by": "OpenPWA compatibility explorer",
  "licence": "CC BY 4.0",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "OpenPWA — https://openpwa.net",
  "attribution_html": "<a href=\"https://openpwa.net\">OpenPWA</a>, <a href=\"https://creativecommons.org/licenses/by/4.0/\">CC BY 4.0</a>"
}