title: PrimeNG p-chips delete only
body: <p>I'm using p-chips of primeNG with Angular 2.
  <a href="https://www.primefaces.org/primeng/#/chips" rel="nofollow noreferrer">https://www.primefaces.org/primeng/#/chips</a></p>
  
  <p>My p-chips is filled when selecting value of a multi-select list.
  I would like to disable the addition of data by writing in the p-chips.</p>
  
  <p>But I want to keep the possibility of deleting values.</p>
  
  <p>Is it possible ? 
  Otherwise do you know any other tool which can do this ? </p>