Question

我有一个简单的外部项目（https://www.npmjs.com/package/undo-manager），我想创建一个环境声明（这显然是错误的）：

declare module "undo-manager" {
    interface UndoManager {
        setCallback(f:Function):void;
        undo():void;
        redo():void;
        hasUndo():boolean;
        hasRedo():boolean;
        add(cmd:Command):void;
    }
    interface Command {
        redo():any;
        undo():any;
    }
    interface UndoManagerFactory {
        new(): UndoManager;
    }
}

我的问题是如何更改声明，以便我可以像这样使用撤消管理器

var UndoManager = require('undo-manager');
// some more imports may be needed to get Command, but how?

undoManager = new UndoManager();

function addCmd(cmd: Command) {
    undoManager.add(cmd);
}
addCmd({
    redo: () => doSomething(),
    undo: () => undoSomething()
});

Answer 1

定义文件应为

declare module "undo-manager" {
    module UndoManager {
        export interface Command {
            redo(): any;
            undo(): any;
        }
    }
    class UndoManager {
        setCallback(f: Function): void;
        undo(): void;
        redo(): void;
        hasUndo(): boolean;
        hasRedo(): boolean;
        add(cmd: UndoManager.Command): void;
    }

    export = UndoManager
}

以这种方式使用

import * as UndoManager from 'undo-manager'

const um = new UndoManager()

function addCmd(cmd: UndoManager.Command) {
    um.add(cmd)
}

两条评论：

1- UndoManager中可用的公共方法似乎多于定义文件

中列出的方法

2-既然我们在这里，你可以将这个定义文件贡献给DefinitelyTyped（或者更好的是让代码作者维护它），这将是很好的。

如何创建简单类的环境声明

1 个答案: