Truncate string

JavaScript, String · Oct 21, 2020

Truncates a string up to a specified length.

  • Determine if String.prototype.length is greater than num.
  • Return the string truncated to the desired length, with '...' appended to the end or the original string.
const truncateString = (str, num) =>
  str.length > num ? str.slice(0, num > 3 ? num - 3 : num) + '...' : str;
truncateString('boomerang', 7); // 'boom...'

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