How to encapsulate js file for specific module in nodejs?

Question

JavaScript

In general, there is a module, let's say login.ejs + login.js.
Question: how to make login.js scope only at login.ejs level?
In other words, how to make it so that if there are 2 .button classes on the page, then the $('.button') call would only find the one in login.ejs?
PS: .ejs is an html file.
More:
If the user is not registered, then I include registration:

<% if (!registered) { %>
    <%= include login.ejs %>
<% } %>

login.ejs looks like this:

<script type="text/JavaScript" src="./javascripts/login.js"></script>
<div class="row small-4 panel">
  <label>Login
        <input class="login" type="text" placeholder="Login" />
    </label>
  <label>Password
        <input class="password" type="text" placeholder="Password" />
    </label>
  <a href="#" class="enter button small small-12">Login</a>
</div>

That is, before the HTML, I also add a link to the script with the js handler. And I need this js handler to see only this form (login.ejs), and ignore the rest of the HTML on the page.

Answer 1

This is in no way related to NodeJS.
Give the top div an id in the template and restrict the selector to that div in the script.