在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

非标
此特征是非标准的，且不在标准轨道中。不要在面向 Web 的生产站点中使用它：它不适用于每个用户。实现之间可能存在大的不兼容性，且行为将来可能改变。

The non-standard Window 方法 requestFileSystem() method is a Google Chrome-specific method which lets a web site or app gain access to a sandboxed file system for its own use. The returned FileSystem is then available for use with the other 文件系统 API .

Even compared to the rest of the File and Directory Entries API, requestFileSystem() is especially non-standard; only Chrome implements it, and all other browser makers have decided that they will not implement it. It has even been removed from the proposed specification . Do not use this method!

句法

This method is prefixed with webkit in all browsers that implement it (that is, Google Chrome).

window.requestFileSystem(type, size, successCallback[, errorCallback]);
					

参数

type

The type of storage to request. Specify Window.TEMPORARY if it's acceptable for the browser to delete the files at its own discretion, such as if storage space runs low, or Window.PERSISTENT if you need the files to remain in place unless the user or the web site or app explicitly permit it. Persistent storage requires that the user grant the site quota.

size

The amount of storage space you wish to have allocated for your app's use.

successCallback

A function which is invoked when the file system has been successfully obtained. The callback receives a single parameter: a FileSystem object representing the file system the app has permission to use.

errorCallback 可选

An optional parameter specifying a function which is called if an error occurs while attempting to obtain the file system, or if the user denies permission to create or access the file system. The callback receives as input a single parameter: a FileError object describing the error.

返回值

undefined

范例

规范

规范	状态	注释
文件和目录条目 API	草案	提议 API 草案

此 API 没有正式的 W3C 或 WHATWG (Web 超文本应用程序技术工作组) 规范。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
requestFileSystem 非标	Chrome 13 Prefixed 13 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge ≤18 Prefixed ≤18 Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox No	IE No	Opera No	Safari No	WebView Android 37 Prefixed 37 Prefixed Prefixed Implemented with the vendor prefix: webkit	Chrome Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

非标。预期跨浏览器支持较差。

非标。预期跨浏览器支持较差。

要求使用供应商前缀或不同名称。

要求使用供应商前缀或不同名称。

另请参阅

• Firefox 中的文件和目录条目 API 支持

元数据

• 最后修改： Jun 7, 2019

相关话题

1. 文件和目录条目 API
2. Window
3. 特性

   1. applicationCache
   2. caches
   3. closed
   4. console
   5. controllers
   6. crossOriginIsolated
   7. crypto
   8. customElements
   9. defaultStatus
   10. devicePixelRatio
   11. dialogArguments
   12. 目录
   13. document
   14. event
   15. frameElement
   16. frames
   17. fullScreen
   18. history
   19. indexedDB
   20. innerHeight
   21. innerWidth
   22. isSecureContext
   23. isSecureContext
   24. length
   25. localStorage
   26. location
   27. locationbar
   28. menubar
   29. mozAnimationStartTime
   30. mozInnerScreenX
   31. mozInnerScreenY
   32. mozPaintCount
   33. 名称
   34. navigator
   35. onabort
   36. onafterprint
   37. onanimationcancel
   38. onanimationend
   39. onanimationiteration
   40. onappinstalled
   41. onauxclick
   42. onbeforeinstallprompt
   43. onbeforeprint
   44. onbeforeunload
   45. onblur
   46. oncancel
   47. oncanplay
   48. oncanplaythrough
   49. onchange
   50. onclick
   51. onclose
   52. oncontextmenu
   53. oncuechange
   54. ondblclick
   55. ondevicelight
   56. ondevicemotion
   57. ondeviceorientation
   58. ondeviceorientationabsolute
   59. ondeviceproximity
   60. ondragdrop
   61. ondurationchange
   62. onended
   63. onerror
   64. onfocus
   65. onformdata
   66. ongamepadconnected
   67. ongamepaddisconnected
   68. ongotpointercapture
   69. onhashchange
   70. oninput
   71. oninvalid
   72. onkeydown
   73. onkeypress
   74. onkeyup
   75. onlanguagechange
   76. onload
   77. onloadeddata
   78. onloadedmetadata
   79. onloadend
   80. onloadstart
   81. onlostpointercapture
   82. onmessage
   83. onmessageerror
   84. onmousedown
   85. onmouseenter
   86. onmouseleave
   87. onmousemove
   88. onmouseout
   89. onmouseover
   90. onmouseup
   91. onmozbeforepaint
   92. onpaint
   93. onpause
   94. onplay
   95. onplaying
   96. onpointercancel
   97. onpointerdown
   98. onpointerenter
   99. onpointerleave
   100. onpointermove
   101. onpointerout
   102. onpointerover
   103. onpointerup
   104. onpopstate
   105. onrejectionhandled
   106. onreset
   107. onresize
   108. onscroll
   109. onselect
   110. onselectionchange
   111. onselectstart
   112. onstorage
   113. onsubmit
   114. ontouchcancel
   115. ontouchstart
   116. ontransitioncancel
   117. ontransitionend
   118. onunhandledrejection
   119. onunload
   120. onuserproximity
   121. onvrdisplayactivate
   122. onvrdisplayblur
   123. onvrdisplayconnect
   124. onvrdisplaydeactivate
   125. onvrdisplaydisconnect
   126. onvrdisplayfocus
   127. onvrdisplaypointerrestricted
   128. onvrdisplaypointerunrestricted
   129. onvrdisplaypresentchange
   130. onwheel
   131. opener
   132. origin
   133. outerHeight
   134. outerWidth
   135. pageXOffset
   136. pageYOffset
   137. parent
   138. 性能
   139. personalbar
   140. pkcs11
   141. screen
   142. screenLeft
   143. screenTop
   144. screenX
   145. screenY
   146. scrollbars
   147. scrollMaxX
   148. scrollMaxY
   149. scrollX
   150. scrollY
   151. self
   152. sessionStorage
   153. sidebar
   154. speechSynthesis
   155. status
   156. statusbar
   157. toolbar
   158. top
   159. visualViewport
   160. window
4. 方法

   1. alert()
   2. atob()
   3. back()
   4. blur()
   5. btoa()
   6. cancelAnimationFrame()
   7. cancelIdleCallback()
   8. captureEvents()
   9. clearImmediate()
   10. clearInterval()
   11. clearTimeout()
   12. close()
   13. confirm()
   14. convertPointFromNodeToPage()
   15. convertPointFromPageToNode
   16. createImageBitmap()
   17. dump()
   18. fetch()
   19. find()
   20. focus()
   21. forward()
   22. getAttention()
   23. getComputedStyle()
   24. getDefaultComputedStyle()
   25. getSelection()
   26. home()
   27. matchMedia()
   28. minimize()
   29. moveBy()
   30. moveTo()
   31. open()
   32. openDialog()
   33. postMessage()
   34. print()
   35. prompt()
   36. queueMicrotask()
   37. releaseEvents()
   38. requestAnimationFrame()
   39. requestFileSystem()
   40. requestIdleCallback()
   41. resizeBy()
   42. resizeTo()
   43. restore()
   44. routeEvent()
   45. scroll()
   46. scrollBy()
   47. scrollByLines()
   48. scrollByPages()
   49. scrollTo()
   50. setCursor()
   51. setImmediate()
   52. setInterval()
   53. setTimeout()
   54. showModalDialog()
   55. sizeToContent()
   56. stop()
   57. updateCommands()
5. 事件

   1. event
   2. afterprint
   3. animationcancel
   4. animationend
   5. animationiteration
   6. beforeprint
   7. beforeunload
   8. blur
   9. copy
   10. cut
   11. DOMContentLoaded
   12. error
   13. focus
   14. hashchange
   15. languagechange
   16. load
   17. message
   18. messageerror
   19. offline
   20. online
   21. orientationchange
   22. pagehide
   23. pageshow
   24. paste
   25. popstate
   26. rejectionhandled
   27. storage
   28. transitioncancel
   29. unhandledrejection
   30. unload
   31. vrdisplayconnect
   32. vrdisplaydisconnect
   33. vrdisplaypresentchange
6. 文件系统 API 相关页面

   1. FileError
   2. FileException
   3. FileHandle
   4. FileRequest
   5. FileSystem
   6. FileSystemDirectoryEntry
   7. FileSystemDirectoryEntrySync
   8. FileSystemDirectoryReader
   9. FileSystemDirectoryReaderSync
   10. FileSystemEntry
   11. FileSystemEntrySync
   12. FileSystemFileEntry
   13. FileSystemFileEntrySync
   14. FileSystemFlags
   15. FileSystemSync
   16. HTMLInputElement
   17. LocalFileSystem
   18. LocalFileSystemSync
   19. LockedFile
   20. 元数据
   21. Window.requestFileSystem()
   22. Window.resolveLocalFileSystemURL()
   23. WorkerGlobalScope.requestFileSystemSync()