Function getFileExtension

Get the file extension from a given file name.

Throws

Throws an error if the file name has no extension or is invalid.

Example

console.log(getFileExtension('image.png')); // png
console.log(getFileExtension('document.pdf')); // pdf
console.log(getFileExtension('archive.tar.gz')); // gz
  • getFileExtension(fileName: string): string

  • Parameters

    • fileName: string

      The name of the file including its extension.

    Returns string

    The file extension (e.g., 'png', 'jpg', 'svg').

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