Truncate a string based on the number of characters before and after

middle-truncate-text.ts

/*
 * Middle Truncate Text
 *
 * Example: middleTruncateText('123456789', 3), returns "123...789"
 *
 * @param {string} text - The text to be truncated
 * @param {number} visibleSize - Number of chars on each side (default 5)
 * @param {string} ellipsis - The string to place on truncated text (default '...')
 */
export const middleTruncateText: (
  text: string,
  visibleSize?: number,
  ellipsis?: string
) => string = (text, visibleSize = 5, ellipsis = '...') => {
  if ((visibleSize * 2) + ellipsis.length > text.length)
    return text;

  return text.substring(0, visibleSize) + ellipsis + text.substring(text.length - visibleSize)
}