覆盖一个npm包的默认typescript类型定义 🔑 How to override or extend a libary type definition in Typescript

比如给axios的 AxiosRequestConfig 加一个属性：

创建一个 src/axios.d.ts 文件，内容为：

import * as axios from 'axios';
declare module 'axios' {
  interface AxiosRequestConfig {
    hideErrorMessage?: boolean;
  }
}

import * as axios from 'axios';

declare module 'axios' {

interface AxiosRequestConfig {

hideErrorMessage?: boolean;

}

Put additional typings in custom-typings.d.ts in root of src.

custom-typings.d.ts

import * as mongoose from "mongoose";

//augment validate.js
declare module "validate.js" {
    let Promise: any;
    function async(param: any): any;
}

//augment mongoose
declare module "mongoose" {
    let modelSchemas: mongoose.Schema[]
}

import * as mongoose from "mongoose";

//augment validate.js

declare module "validate.js" {

let Promise: any;

function async(param: any): any;

}

//augment mongoose

declare module "mongoose" {

let modelSchemas: mongoose.Schema[]

}

my-module.ts

import validate = require("validate.js");
import mongoose = require("mongoose");
import * as Bluebird from "bluebird";

validate.Promise = Bluebird;
mongoose.Promise = Bluebird;

let schema = new mongoose.Schema({
    name: String
});

mongoose.modelSchemas = [schema];

validate.async("foo");

import validate = require("validate.js");

import mongoose = require("mongoose");

import * as Bluebird from "bluebird";

validate.Promise = Bluebird;

mongoose.Promise = Bluebird;

let schema = new mongoose.Schema({

name: String

});

mongoose.modelSchemas = [schema];

validate.async("foo");

Why import with ES5 syntax (require)? ES6 modules and their properties are constant.

from: https://stackoverflow.com/questions/43952198/how-to-override-or-extend-a-libary-type-definition-in-typescript

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