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Truncate a string to a set length, breaking at word boundaries

/ Published in: JavaScript
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  1. /**
  2.  * Author: Andrew Hedges, [email protected]
  3.  * License: free to use, alter, and redistribute without attribution
  4.  */
  5.  
  6. /**
  7.  * Truncate a string to the given length, breaking at word boundaries and adding an elipsis
  8.  * @param string str String to be truncated
  9.  * @param integer limit Max length of the string
  10.  * @return string
  11.  */
  12. var truncate = function (str, limit) {
  13. 	var bits, i;
  14. 	if (STR !== typeof str) {
  15. 		return '';
  16. 	}
  17. 	bits = str.split('');
  18. 	if (bits.length > limit) {
  19. 		for (i = bits.length - 1; i > -1; --i) {
  20. 			if (i > limit) {
  21. 				bits.length = i;
  22. 			}
  23. 			else if (' ' === bits[i]) {
  24. 				bits.length = i;
  25. 				break;
  26. 			}
  27. 		}
  28. 		bits.push('...');
  29. 	}
  30. 	return bits.join('');
  31. };
  32. // END: truncate

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