I have followed the below steps to start using jquery in spfx.
Install the typings for jQuery:
npm install --save @types/jquery
Update the config.json in the config folder to load jQuery from CDN. Add an entry to the externals field:
"jquery": "https://code.jquery.com/jquery-3.1.0.min.js"
Import jQuery in your web part:
import * as $ from 'jquery';
Upto step 2 my application is working fine but after adding step 3 I start getting error:-
Error - typescript - node_modules\@types\jquery\index.d.ts(2960,62):error TS2304: Cannot find name 'Iterable'.
[13:44:35] Error - 'typescript' sub task errored after 1.68 s
TypeScript error(s) occurred.