Function getFileExtension

  • getFileExtension(fileName): string | undefined

  • Returns the file extension of a file, or undefined

    Parameters

    • fileName: string

      file name to get extension of

    Returns string | undefined

    the file extension, or undefined

    Example

    getFileExtension('test.ext'); // 'ext'
    getFileExtension('test.doc.ext'); // 'ext'
    getFileExtension('test'); // undefined

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