error TS2497: Module ''jimp'' resolves to a non-module entity and cannot be imported using this construct.

Hi,

I cannot import jimp with typescript, getting error. Details are below.

Expected Behavior

There shouldn’t be a compilation-time error.

Current Behavior

There is a compilation-time error. error TS2497: Module ''jimp'' resolves to a non-module entity and cannot be imported using this construct. import * as jimp from 'jimp';

Also, import jimp from 'jimp'; doesn’t work because it imports the jimp into jimp_1 and becomes not usable…

Failure Information (for bugs)

Steps to Reproduce

Import jimp in a typescript file with import * as jimp from 'jimp';

• Jimp Version: ^0.3.9
• Operating System: MacOS
• Node version: v8.11.3
• TypeScript version: 3.0.1

Failure Logs

error TS2497: Module ''jimp'' resolves to a non-module entity and cannot be imported using this construct. import * as jimp from 'jimp';

[favna]

I’ll add the ignore and create the PR but I’ll keep this issue open (will rewrite the commit message to remove the “resolves” part). I think the ideal case would be to rewrite the declarations file, specifically by extracting the class Jimp from the namespace Jimp and basically restructuring it entirely.

[favna]

Actually yes, I have since figured out that it works with import Jimp = require('jimp');. It ended up being documented on typescriptlang

Extract:

Both CommonJS and AMD generally have the concept of an exports object which contains all exports from a module.

They also support replacing the exports object with a custom single object. Default exports are meant to act as a replacement for this behavior; however, the two are incompatible. TypeScript supports export = to model the traditional CommonJS and AMD workflow.

The export = syntax specifies a single object that is exported from the module. This can be a class, interface, namespace, function, or enum.

When exporting a module using export =, TypeScript-specific import module = require("module") must be used to import the module

IMO it feels off to be using require in TypeScript but if we would like to use import * as Jimp from 'jimp' or such a more ES6 Import/Export structure the definitions file would have to be rewritten a lot I’m afraid. I tried messing around myself a lot but I couldn’t get it that’s for sure :\