typescript types

[umutc]

hello,

i am importing module from a ".ts" file but it says types are not defined.
import * as windowManager from "electron-window-manager";

Could not find a declaration file for module 'electron-window-manager'. 'node_modules/electron-window-manager/index.js' implicitly has an 'any' type.
  Try `npm install @types/electron-window-manager` if it exists or add a new declaration (.d.ts) file containing `declare module 'electron-window-manager';`ts(7016)

thanks