从变量创建新的javascript对象

Question

我想在javascript中创建一个新对象(使用简单继承),以便从变量定义对象的类:

var class = 'Person';
var inst = new class

有任何想法吗？

Answer 1

你可以做点什么

function Person(){};
var name = 'Person';
var inst = new this[name]

关键是引用拥有构造函数的对象.这在全局范围内工作正常,但如果您将代码转储到函数内部,则可能必须更改引用,因为this可能无法工作.

编辑:传递参数:

function Person(name){alert(name)};
var name = 'Person';
var inst = new this[name]('john')

Answer 2

这是我如何做到的.与meder的答案类似.

var className = 'Person'
// here's the trick: get a reference to the class object itself
// (I've assumed the class is defined in global scope)
var myclass = window[className];
// now you have a reference to the object, the new keyword will work:
var inst = new myclass('params','if','you','need','them');