javascript - 无法通过 JavaScript 访问变量 - 范围错误？

Question

我在单独的 .js 文件中有一些数据，与此类似:

data = new Object();
data['cat'] = ['Mr. Whiskers','Wobbles'];
data['dog'] = ['Toothy'];
data['fish'] = ['goldy','roose'];

function getStuff(info)
{
  var stuff = data[info.value];
  return stuff;
}

现在在另一个带有 block 的 html 文件中，我有这样的内容:

function theDrop(dynamic) {
  alert(getStuff(dynamic));
}

该框显示未定义，为什么？

Answer 1

您要传递给 theDrop 的内容是什么？如果你想调用.value，那么你需要传递整个对象，否则你会得到undefined

<强> Live Demo

var select = document.getElementById("selectme");

select.onchange = function(){
    theDrop(this);
}

data = new Object();
data['cat'] = ['Mr. Whiskers','Wobbles'];
data['dog'] = ['Toothy'];
data['fish'] = ['goldy','roose'];

function getStuff(info)
{
    var stuff = data[info.value];
    return stuff;
}

function theDrop(dynamic) {
    alert(getStuff(dynamic));
}