TypeScript 中的公共静态常量 [英] public static const in TypeScript

问题描述

TypeScript 中是否有公共静态常量之类的东西?我有一个看起来像这样的课程:

Is there such a thing as public static constants in TypeScript? I have a class that looks like:

export class Library {
  public static BOOK_SHELF_NONE: string = "None";
  public static BOOK_SHELF_FULL: string = "Full";
}

在那堂课上，我可以做 Library.BOOK_SHELF_NONE 并且 tsc 没有抱怨.但是如果我尝试在其他地方使用类库，并尝试做同样的事情，它就无法识别它.

In that class, I can do Library.BOOK_SHELF_NONE and the tsc doesn't complain. But if I try to use the class Library elsewhere, and try to do the same thing, it doesn't recognize it.

推荐答案

这是编译成的 TS 代码段的内容(通过 ​​TS Playground):

Here's what's this TS snippet compiled into (via TS Playground):

define(["require", "exports"], function(require, exports) {
    var Library = (function () {
        function Library() {
        }
        Library.BOOK_SHELF_NONE = "None";
        Library.BOOK_SHELF_FULL = "Full";
        return Library;
    })();
    exports.Library = Library;
});

如您所见，定义为 public static 的两个属性都简单地附加到导出的函数(作为其属性)；因此，只要您正确访问函数本身，它们就应该是可访问的.

As you see, both properties defined as public static are simply attached to the exported function (as its properties); therefore they should be accessible as long as you properly access the function itself.

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