Aurelia ordinal string value converter

ordinal.js

/**
 * Based off of ordinal converter function found at https://gist.github.com/jlbruno/1535691
 * example:
 * <tr repeat.for="item of items">
 *    <td>${($index + 1) | ordinal} item</td>
 * </tr>
**/

export class OrdinalValueConverter {
	s = ["th","st","nd","rd"];
	
	toView(value) {
		return this.getOrdinal(value);
	}
	
	getOrdinal(n) {
		var v = n % 100;
		return n + (this.s[(v - 20) % 10] || this.s[v] || this.s[0]);
	}
}