Simple function for converting a slugified value to display text.

slug-to-display.js

/**
 * Converts passed slug to capitalized display value.  Not super clever, just
 * intended to deal with lowercase, dashed slugs. Ex.: bananas-in-pajamas -->
 * Bananas In Pajamas
 * 
 * @param {String} slug Slug to convert to display text
 * 
 * @return {String} Returns formatted text
 */
function slugToDisplay ( slug ) {
  if ( ! slug ) { return ''; }
  
  return slug
    .split( '-' )
    .map( segment => segment.substr( 0, 1 ).toUpperCase() + segment.substr( 1, segment.length ) )
    .join( ' ' );
}