[英]Extend a class from a declaration interface in Typescript
有沒有辦法處理類型腳本聲明文件(如類)中的接口或變量,以便能夠從中擴展類?
像這樣:
declare module "tedious" {
import events = module('events');
export class Request extends event.EventEmitter {
constructor (sql: string, callback: Function);
addParameter(name: string, type: any, value: string):any;
addOutputParameter(name: string, type: any): any;
sql:string;
callback: Function;
};
}
現在我必須像這樣重新定義EventEmitter接口並使用我自己的EventEmitter聲明。
import events = module('events');
class EventEmitter implements events.NodeEventEmitter{
addListener(event: string, listener: Function);
on(event: string, listener: Function): any;
once(event: string, listener: Function): void;
removeListener(event: string, listener: Function): void;
removeAllListener(event: string): void;
setMaxListeners(n: number): void;
listeners(event: string): { Function; }[];
emit(event: string, arg1?: any, arg2?: any): void;
}
export class Request extends EventEmitter {
constructor (sql: string, callback: Function);
addParameter(name: string, type: any, value: string):any;
addOutputParameter(name: string, type: any): any;
sql:string;
callback: Function;
};
稍后在我的TypeScript文件中擴展它
import tedious = module('tedious');
class Request extends tedious.Request {
private _myVar:string;
constructor(sql: string, callback: Function){
super(sql, callback);
}
}
我在2013年不知道,但現在很容易:
/// <reference path="../typings/node/node.d.ts" />
import * as events from "events";
class foo extends events.EventEmitter {
constructor() {
super();
}
someFunc() {
this.emit('doorbell');
}
}
我一直在尋找答案,最后想出來了。
它應該工作正常,例如:
// Code in a abc.d.ts
declare module "tedious" {
export class Request {
constructor (sql: string, callback: Function);
addParameter(name: string, type: any, value: string):any;
addOutputParameter(name: string, type: any): any;
sql:string;
callback: Function;
};
}
// Your code:
///<reference path='abc.d.ts'/>
import tedious = module('tedious');
class Request extends tedious.Request {
private _myVar:string;
constructor(sql: string, callback: Function){
super(sql, callback);
}
}
您放入文件中的任何內容都可以放入.d.ts文件中。
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