本文翻译自： How do I dynamically assign properties to an object in TypeScript?
If I wanted to programatically assign a property to an object in Javascript, I would do it like this: ? 如果我想以编程方式将属性分配给Javascript中的对象，则可以这样做：
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var obj = {};
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obj.prop = "value";
But in TypeScript, this generates an error: ? 但是在TypeScript中，这会产生一个错误：
The property 'prop' does not exist on value of type '{}' ? 类型“ {}”的值不存在属性“ prop”
How am I supposed to assign any new property to an object in TypeScript? ? 我应该如何在TypeScript中为对象分配任何新属性？
#1楼
参考： https://stackoom测试数据/question/RkGB/如何在TypeScript中为对象动态分配属性
#2楼
Although the compiler complains it should still output it as you require. ? 尽管编译器抱怨它仍应按您的要求输出。 ? However, this will work. ? 但是，这将起作用。
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var s = {};
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s[ 'prop'] = true;
#3楼
您可以添加此声明以使警告静音。
declare var obj: any;
#4楼
Or all in one go: ? 或一劳永逸：
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var obj: any = {}
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obj.prop = 5;
#5楼
I tend to put? any ?on the other side ie? var foo:IFoo = <any>{}; ? 我倾向于把 any 放在另一边，即 var foo:IFoo = <any>{}; ? So something like this is still typesafe: ? 所以像这样的东西仍然是类型安全的：
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interface IFoo{
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bar: string;
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baz: string;
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boo: string;
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}
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// How I tend to intialize
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var foo:IFoo = < any>{};
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foo.bar = "asdf";
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foo.baz = "boo";
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foo.boo = "boo";
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// the following is an error,
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// so you haven't lost type safety
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foo.bar = 123;
Alternatively you can mark these properties as optional: ? 另外，您可以将这些属性标记为可选：
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interface IFoo{
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bar?:string;
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baz?:string;
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boo?:string;
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}
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// Now your simple initialization works
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var foo:IFoo = {};
Try it online ? 在线尝试
#6楼
Store any new property on any kind of object by typecasting it to 'any': ? 将任何新属性存储在任何类型的对象上，方法是将其类型转换为“ any”：
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var extend = <any>myObject;
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extend.NewProperty = anotherObject;
Later on you can retrieve it by casting your extended object back to 'any': ? 稍后，您可以通过将扩展对象转换回'any'来检索它：
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var extendedObject = < any>myObject;
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var anotherObject = <AnotherObjectType>extendedObject.NewProperty;
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