storing data in javascript

var box ={}

box["material"]="cardboard";

box["dimensions"]={

"height":2,

"width":60

}

box.area=function(){

return box.dimensions.height * box.dimensions.width;

}

console.log(". notation");

console.log(box);

console.log(box.material);

console.log(box.dimensions);

console.log(box.area);

console.log(box.area());

console.log("-----brackets notation-----");

console.log(box);

console.log(box["material"]);

console.log(box["dimensions"]);

console.log(box["area"]);

console.log(box["area"]());

OUTPUT: