CODE EXAMPLE FOR TYPESCRIPT

jquery in Angular

//first step:
npm install --save jquery

npm install -D @types/jquery

//secong step:
"scripts": [ "node_modules/jquery/dist/jquery.min.js" ]

//third step:
<script type="text/javascript" src="assets/js/jquery-2.1.1.min.js"></script>

//fourth step in .ts file:
import * as $ from 'jquery';

ngOnInit(): void {
    this.GET_LOGIN_FORM_VALUE();

    $(document).ready(() => {
      $("button").click(() => {
        $("h3").css("color", "red");
      });
    });
  }