traverse objects iteratively

traverse.js

function traverse(obj) {
    var stack = [];
	  var i = 0;
    stack.push(obj);

    while (stack.length) {
        for (var j in stack[0]) {
            i++;
            if (typeof stack[0][j] === 'object') {
                stack.push(stack[0][j]);
            } else {
              if(String(j) === 'initializeVariantDropdowns' || i % 100000 === 0) {
                console.log('%s: %s', j, stack[0][j]);
            	}
            }
        }
        if( i > 1000000) {
       			console.log('greater than a million'); 
            break;
      	}
        stack.shift();
    }
}