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Neutralino.filesystem

Neutralino.filesystem namespace contains methods for handling files.

filesystem.createDirectory(path)#

Creates a new directory. Throws NE_FS_DIRCRER if directory creation is not possible.

Parameters#

  • path String: New directory path.
await Neutralino.filesystem.createDirectory('./newDirectory');
await Neutralino.filesystem.createDirectory(NL_PATH + '/myFolder');

filesystem.removeDirectory(path)#

Removes a given directory. Throws NE_FS_RMDIRER if the removal is not possible.

Parameters#

  • path String: Directory path.
await Neutralino.filesystem.removeDirectory('./tmpDirectory');

filesystem.writeFile(filename, data)#

Writes a text file. Throws NE_FS_FILWRER for file write errors.

Parameters#

  • filename String: Filename.
  • data String: Content of the file.
await Neutralino.filesystem.writeFile('./myFile.txt', 'Sample content');

filesystem.appendFile(filename, data)#

Appends text content to file. Throws NE_FS_FILWRER for file write errors. If the provided file doesn't exist, this function creates a new file with data.

Parameters#

  • filename String: Filename.
  • data String: Content to append.
await Neutralino.filesystem.appendFile('./myFile.txt', 'Sample ');
await Neutralino.filesystem.appendFile('./myFile.txt', 'content');

filesystem.writeBinaryFile(filename, data)#

Writes a binary file. Throws NE_FS_FILWRER for file write errors.

Parameters#

  • filename String: Filename.
  • data ArrayBuffer: Content of the binary file as an ArrayBuffer.
let rawBin = new ArrayBuffer(1);
let view = new Uint8Array(rawBin);
view[0] = 64; // Saves ASCII '@' to the binary file
await Neutralino.filesystem.writeBinaryFile('./myFile.bin', rawBin);

filesystem.appendBinaryFile(filename, data)#

Appends binary data to a file. Throws NE_FS_FILWRER for file write errors. If the provided file doesn't exist, this function creates a new file with data.

Parameters#

  • filename String: Filename.
  • data ArrayBuffer: Binary content to append as an ArrayBuffer.
let rawBin = new ArrayBuffer(1);
let view = new Uint8Array(rawBin);
view[0] = 64; // Saves ASCII '@' to the binary file
await Neutralino.filesystem.appendBinaryFile('./myFile.bin', rawBin);
await Neutralino.filesystem.appendBinaryFile('./myFile.bin', rawBin);

filesystem.readFile(filename)#

Reads a text file. Throws NE_FS_FILRDER for file read errors.

Parameters#

  • filename: Filename.

Return String (awaited):#

File content.

let data = await Neutralino.filesystem.readFile('./myFile.txt');
console.log(`Content: ${data}`);

filesystem.readBinaryFile(filename)#

Reads binary files. Throws NE_FS_FILRDER for file read errors.

Parameters#

  • filename String: Filename.

Return Object (awaited):#

Content of the binary file as an ArrayBuffer.

let data = await Neutralino.filesystem.readBinaryFile({
fileName: './myFile.bin'
});
let view = new Uint8Array(data);
console.log('Binary content: ', view);

filesystem.removeFile(filename)#

Removes given file. Throws NE_FS_FILRMER for file removal errors.

Parameters#

  • filename String: Filename.
await Neutralino.filesystem.removeFile('./myFile.txt');

filesystem.readDirectory(path)#

Reads directory contents. Throws NE_FS_NOPATHE if the path doesn't exist.

Parameters#

  • path String: File/directory path.

Return Object (awaited):#

  • entry String: file name.
  • type String: The type of the entry (FILE or DIRECTORY).
let entries = await Neutralino.filesystem.readDirectory(NL_PATH);
console.log('Content: ', entries);

filesystem.copyFile(source, destination)#

Copies a file to a new destination. Throws NE_FS_COPYFER if the system cannot copy the file.

Parameters#

  • source String: Source path.
  • destination String: Destination path.
await Neutralino.filesystem.copyFile('./source.txt', './destination.txt');

filesystem.moveFile(source, destination)#

Moves a file to a new destination. Throws NE_FS_MOVEFER if the system cannot move the file.

Parameters#

  • source String: Source path.
  • destination String: Destination path.
await Neutralino.filesystem.moveFile('./source.txt', './destination.txt');

filesystem.getStats(path)#

Returns file statistics for the given path. If the given path doesn't exist or is inaccessible,NE_FS_NOPATHE is thrown. Therefore, you can use this method to check for the existance of a file or directory.

Parameters#

  • path String: File or directory path.

Return Object (awaited):#

  • size Number: Size in bytes.
  • isFile Boolean: true if the path represents a normal file.
  • isDirectory Boolean: true if the path represents a directory.
  • createdAt Number: On Windows, returns Unix milliseconds of the file creation time — On Unix or Unix-like platforms, returns Unix milliseconds of the last inode modification time.
  • modifiedAt Number: Unix milliseconds of the last file modification time.
let stats = await Neutralino.filesystem.getStats('./sampleVideo.mp4');
console.log('Stats:', stats);
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