function filter( pkgs ) {
	var out;
	var d;
	var i;

	out = [];
	for ( i = 0; i < pkgs.length; i++ ) {
		d = pkgs[ i ].data;
		if (
			!hasOwnProp( d, PROP ) ||
			!hasOwnProp( d[ PROP ], 'envs' ) ||
			!hasOwnProp( d[ PROP ].envs, 'browser' ) ||
			d[ PROP ].envs.browser
		) {
			out.push( pkgs[ i ].pkg );
		}
	}
	return out;
}
Filters package meta data for packages which are compatible with browser environments.

@private
@param {ObjectArray} pkgs - package meta data
@returns {(StringArray|EmptyArray)} filtered list of package names