hashchange.js

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var r20 = /%20/g;

function param( obj ) {
  var params = [];
  for ( var key in obj ) {
    var value = obj[ key ];
    var param = key +  '=' + encodeURIComponent( value ).replace( r20, "+" );;
    params.push( param );
  }
  return params.join('&');
}

var rPlus = /\+/g;
function deparam( str ) {
  if ( str.indexOf('=') === -1 ) {
    return;
  }
  var obj = {};
  var params = str.split('&');
  for ( var i=0, len = params.length; i < len; i++ ) {
    var param = params[i];
    param = param.split('=');
    var key = param[0];
    var value = param[1];
    value = decodeURIComponent( value.replace( rPlus, ' ' ) );
    obj[ key ] = value;
  }
  return obj
}


window.addEventListener('hashchange', function() {
    var hash = location.hash.replace( /$#/, '' );
    var obj = deparam
  }
)

function hashify( obj ) {
  window.location.hash = param( obj );
}