Lets you limit the length of the string and truncate the end with ellipses (...).

truncateWithEllipsis.js

/**
 * Lets you limit the length of a string and truncate the end with ellipses (...).
 *
 * @param {String} str  The String to truncate.
 * @param {Number} limit The maximum size of the string.
 */
function truncateWithEllipsis (str, limit) {
	var truncatedString;

	limit -= 3;

	if (str.length > limit) {
		truncatedString = str.substr(0, limit);
		truncatedString = truncatedString.replace(/\s+(\S*)$/, '...');
	} else {
		truncatedString = str;
	}

	return truncatedString;
}