Variable FileUtilsConst

Type declaration

• bytesToSize:function

  • bytesToSize(bytes): string

  • Converts bytes to a human-readable size string.

    Parameters

    • bytes: number

      Number of bytes to convert

    Returns string

    Formatted size string (e.g., "1.5 MB")

    Example

    const size = FileUtils.bytesToSize(1500000); // "1.5 MB"
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• downloadBlob:function

  • downloadBlob(blob, filename): void

  • Downloads a blob as a file. Supports both modern browsers and IE.

    Parameters

    • blob: Blob

      Blob to download
    • filename: string

      Name of the file to save as

    Returns void

    Example

    const blob = new Blob(['Hello World'], { type: 'text/plain' });
    FileUtils.downloadBlob(blob, 'hello.txt');
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• extractBase64FromLocalUrl:function

  • extractBase64FromLocalUrl(url): string

  • Extracts base64 data from a local URL.

    Parameters

    • url: string

      URL containing base64 data

    Returns string

    Base64 string or original URL if no base64 data found

    Example

    const base64 = FileUtils.extractBase64FromLocalUrl('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA...');
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• fileIsAlreadyAttached:function

  • fileIsAlreadyAttached(file, files): undefined | FileData

  • Checks if a file is already attached to a list of files.

    Parameters

    • file: FileData

      File to check
    • files: FileData[]

      List of files to check against

    Returns undefined | FileData

    The matching file if found, undefined otherwise

    Example

    const isDuplicate = FileUtils.fileIsAlreadyAttached(newFile, existingFiles);
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• getBasicFileType:function

  • getBasicFileType(file): FileType

  • Gets the basic file type (image, video, audio, or document).

    Parameters

    • file: File

      File to check

    Returns FileType

    Basic file type

    Example

    const type = FileUtils.getBasicFileType(imageFile); // "image"
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• getImagePreview:function

  • getImagePreview(file): Promise<string>

  • Gets a base64 preview of an image file.

    Parameters

    • file: File

      Image file to preview

    Returns Promise<string>

    Promise resolving to base64 string of the image

    Throws

    Error if file is not an image or fails to load

    Example

    const preview = await FileUtils.getImagePreview(imageFile);
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• getLocalUrl:function

  • getLocalUrl(file, callback): void

  • Gets a local URL for a file.

    Parameters

    • file: File

      File to get URL for
    • callback: ((url) => void)

      Callback function to receive the URL

      • • (url): void

        • Parameters

          • url: string

          Returns void

    Returns void

    Example

    FileUtils.getLocalUrl(file, (url) => {
      console.log('File URL:', url);
    });
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• isFileExtension:function

  • isFileExtension(extension): boolean

  • Checks if a value is a valid file extension.

    Parameters

    • extension: string

      File extension to validate

    Returns boolean

    True if valid, false otherwise

    Example

    const isValid = FileUtils.isFileExtension('jpg'); // true
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• sizeToBytes:function

  • sizeToBytes(size, units): number

  • Converts a size with units to bytes.

    Parameters

    • size: string | number

      Size to convert
    • units: string

      Units of the size (B, KB, MB, GB, TB)

    Returns number

    Size in bytes

    Example

    const bytes = FileUtils.sizeToBytes(1.5, 'MB'); // 1572864
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