为什么我不能在 TypeScript 中导入 sprintf-js

Question

I have a TypeScript file into which I'm importing third-party libraries.

import * as _ from 'lodash'; // Works great!
import * as moment from 'moment'; // Works great!
import {vsprintf} from 'sprintf-js'; // Compiler error

As my comments explain, the first two imports work great, but the sprintf-js import does not. I get the following compiler error:

Error TS2307: Cannot find module 'sprintf-js'.

Without a doubt, I have sprintf-js inside of my node_modules folder. I'm not very knowledgeable about node modules. I'm guessing that the sprintf-js libarary does something different than lodash or moment and that TypeScript doesn't like it. How can I make this work?

Answer 1

You will need to add a typing definition for sprintf-js . Depending on your setup - if you have TSD installed and setup with your project, it would be a case of running:

tsd  query sprintf-js --action save

otherwise, you can have a read here:

http://definitelytyped.org/

or simply download the typing definition and include it in the project root folder:

https://raw.githubusercontent.com/DefinitelyTyped/DefinitelyTyped/master/sprintf-js/sprintf-js.d.ts