JSFiddle - React, Tailwind, and code Playground

HTML

<a href=# id=remove-file>remove</a><br><a href=# id=add-file>add</a>

JavaScript

var no_of_file = 2;

    $('#remove-file').click(function() {
       no_of_file--;
       alert(no_of_file);
    }); 

    $('#add-file').click(function() {
      no_of_file++;
      alert(no_of_file);
    });