reading time

readingTime.js

/*
** readingTime
** ===========
** Given a string, it returns the time a human needs to read it
** @param {String} text - the string to analyze 
** @param {Number} wpm - words per minute
*/

function readingTime( text, wpm ) {
  
  if ( !text ) text = '';
  
  var words = text.trim().split(/\s+/g).length;
  var wps   = ( wpm || 210 ) / 60;
  var rts   = words / wps;

  var m = Math.floor( rts / 60 );
  var s = Math.round( rts - m * 60 );

  return( {
    minutes: m,
    seconds: s
  } );
  
}