# FileSystemManager.access(Object object)

with Promise style call: Not supported

Mini Program plugin: Support, need to Mini Program base library version no less than 2.19.2

Judgment file/Directory exists

# parameter

# Object object

attribute	type	Required	Introductions
path	string	yes	Files to determine if they exist/Directory path (Local path)
success	function	no	Interface calls the successful callback function
fail	function	no	Interface calls failed callback functions
complete	function	no	Callback function at the end of an interface call (both successful and unsuccessful calls are executed)

# object.fail callback

# parameter

# Object res

attribute	type	Introductions
errMsg	string	Error message

res.errMsg Legal value

value	Introductions	Minimum version
fail No such file or directory ${path}	file/Directory does not exist
fail sdcard not mounted	Android sdcard Mount failure

# sample code

const fs = wx.getFileSystemManager()
// Judgment file/Directory exists
fs.access({
  path: `${wx.env.USER_DATA_PATH}/hello.txt`, 
  success(res) {
    // File existence
    console.log(res)
  },
  fail(res) {
    // File does not exist or other error
    console.error(res)
  }
})

// Synchronous interface
try {
  fs.accessSync(`${wx.env.USER_DATA_PATH}/hello.txt`)
} catch(and) {
  console.error(and)
}