Step-by-step guide on importing Nano (CouchDB) using Typescript

I am facing difficulty in importing and using nano in my node application.

According to the documentation, the JavaScript way is:

var nano = require('nano')('http://localhost:5984');

How can I achieve this with TypeScript?

I attempted to do it like this:

import * as Nano from "nano";
let nano = new Nano('http://localhost:5984');

However, I encounter the error message: "Nano is not an object."

Answer №1

By adding @types/nano to our project, we have access to:

node_modules/@types/nano/index.d.ts

Within this file, we find the following declaration:

declare function nano(config: nano.Configuration | string):
 nano.ServerScope | nano.DocumentScope;

This indicates that Nano is a function and not an object. Therefore, the correct solution is:

import * as Nano from "nano";
let nano = Nano('http://localhost:5984');

Answer №2

Ensure you perform typecasting in the following manner:

import * as Nano from "nano";

let nano: Nano.ServerScope = <Nano.ServerScope>Nano('http://localhost:5984');
let databaseConnection = nano.use(databaseName);

Answer №3

Starting with version 7.x, nano now includes TypeScript type information for IDEs, eliminating the need to import extra typings.

The following code snippet should suffice:

import Nano from "nano";
let n = Nano('localhost:5984');

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