通过Javascript中的变量访问对象属性

Question

我在Javascript中有一个对象。例如......：

vehicle.image.jpg.large = "mylargejpg.jpg";

或

vehicle.image.jpg.small = "mysmalljpg.jpg";

然后我有一个变量

var imageType = "jpg.small";

如何使用“imageType”变量??

动态返回该对象的值

IE：vehicle.image \ imageType;或任何会返回“mysmalljpg.jpg”

Answer 1

你想要遍历你的对象......

// Takes an object and a path to some element and traverses the object
function traverse(obj, path) {
  // split the path into pieces 
  var links = path.split(".");

  // traverse the object - one level at a time 
  for (var x = 0; x < links.length; ++x) 
    obj = obj[links[x]];

  return obj;
}

traverse(vehicle.image, "jpg.small");