JAVASCRIPT

use jquery in angular

// In the console
// First install jQuery
npm install --save jquery
// and jQuery Definition
npm install -D @types/jquery

=======================================(in angular)
import * as $ from 'jquery';
//
$('#elemId').width();

// OR

// CommonJS style - working with "require"
import $ = require('jquery')
//
$('#elemId').width();

import jquery into angular 8

import * as $ from 'jquery'