Count nodes in a page in javascript

count.js

// This beautiful oneliner is a recursive function that counts the nodes in a given node
// It uses the ES6 "=>" notation for anonymous functions
var count = (node) => 1 + Array.prototype.slice.apply(node.childNodes).reduce((p,q) => count(q)+p, 0);

// Count the number of nodes in the current document
count(document);

oldcount.js

// Less beautiful oneliner of traditional JS that does the same thing:
function count(node) {for (var i=0,r=1;i<node.childNodes.length;i++) r+=count(node.childNodes[i]); return r}

// Count the number of nodes in the current document
count(document);