title: declarations.d.ts in Angular 7
body: <p>A few days back I switched to Angular 7 and not able to locate declarations.d.ts.</p>
  
  <p>In Angular 2 and 4, I used declarations.d.ts to define the typing for JQUERY and others -</p>
  
  <pre><code>interface JQuery {
    datepicker(options: any): JQuery;
    modal(options: any): JQuery;
  }
  </code></pre>
  
  <p>Where to define unknown element interface in Angular 7 ?</p>
  
  <p>Note: I used Angular CLI to generate the project.</p>