Simple Parse Uri function using HTMLAnchorElement

parseUri.js

var uriNames = 'protocol hostname host pathname port search hash href origin'.split( ' ' );

var parseUri = function( url ) {
    var Uri = function uri() {
        var self = this,
        setProp = function( nm, val ) {
            if ( nm === 'search' ) {
                val = ( String( val )[ 0 ] !== '?' ) ? '?' + val : val;
            }
                            
            return self.a[ nm ] = val;
        };
                    
        self.a = doc.createElement( 'a' );
        self.a.href = url;
                    
        uriNames.forEach( function( nm ) {
            var _p = self.a[ nm ];
            Object.defineProperty( self, nm, {
                get: function() { return _p; },
                set: function( val ) { _p = setProp( nm, val ); }
            });
        });
    };

    Uri.prototype.toUrlString = function() {
        return this.a.href;
    };
                
    return new Uri();
};