FileSystemManager.access

Introduction

Checks if a file/directory exists.

Usage Restrictions

Supported on basic library version 3.0.0 or higher.

Parameters

Object object

Property	Type	Default Value	Required	Description
path	string		Yes	The file/directory path to check (relative path)
success	function		No	Callback function executed when the interface call is successful
fail	function		No	Callback function executed when the interface call fails
complete	function		No	Callback function executed when the interface call ends (executed regardless of success or failure)

object.success Callback Function

Parameters

Object res

Property	Type	Description
success	string	true - Set successfully

object.fail

Callback Function

Parameters

Object res

Property	Type	Description
errMsg	string	Error message
success	string	false - Set failed

errMsg Description

Error Message	Description
parameter error: F10001	Invalid parameter
fail sdcard not mounted: F10002	Android sdcard mount failed
fail no such file or directory: F10007, ${path}	File/directory does not exist
fail operation not permitted, unlink ${filePath}	The filePath provided is a directory

Sample Code

// pages/index/index.js
Page({
  access() {
    const fs = dlt.getFileSystemManager();
    fs.access({
      path: `${dlt.env.USER_DATA_PATH}/hello.txt`,
      success(res) {
        // File exists
        console.log(res);
      },
      fail(res) {
        // File does not exist or other errors
        console.error(res);
      },
    });
  },
});