1 var d3_selectionRoot = d3_selection([[document]]);

     2 

     3 d3_selectionRoot[0].parentNode = document.documentElement;

     4 

     5 // TODO fast singleton implementation!

     6 // TODO select(function)

     7 d3.select = function(selector) {

     8   return typeof selector === "string"

     9       ? d3_selectionRoot.select(selector)

    10       : d3_selection([[selector]]); // assume node

    11 };

    12 

    13 // TODO selectAll(function)

    14 d3.selectAll = function(selector) {

    15   return typeof selector === "string"

    16       ? d3_selectionRoot.selectAll(selector)

    17       : d3_selection([d3_array(selector)]); // assume node[]

    18 };