30-seconds-of-code/snippets/js/s/truncate-string.md

title, type, language, tags, cover, dateModified

title	type	language	tags	cover	dateModified
Truncate string	snippet	javascript	string	bamboo-lamp	2020-10-21T21:17:45+03:00

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...'