Optional Chaining Is Probably Hiding Real Bugs in Your Next.js App

Optional chaining is genuinely useful for values that are legitimately, expectedly sometimes absent. The problem is how often it gets applied defensively, everywhere, as a reflex against crashes, including on values that should always exist if everything upstream is actually working correctly. When one of those genuinely-should-never-be-undefined values is undefined anyway, ?. doesn't surface that as the real problem it is, it just quietly renders nothing and moves on.

The Pattern That Looks Like Careful, Defensive Code

export default async function DashboardPage() {
  const session = await getSession();
  const user = await getUserData(session?.userId);

  return (
    <div>
      <h1>Welcome, {user?.name}</h1>
      <p>Role: {user?.role}</p>
      {user?.role === 'admin' && <AdminPanel />}
    </div>
  );
}

Every one of these optional chains looks like responsible, defensive coding. If session is somehow null, session?.userId gracefully becomes undefined instead of throwing. If user fails to load, the page still renders instead of crashing. This feels careful. It's also actively hiding the fact that, if this route is only reachable by an authenticated user in the first place, session and user being undefined here isn't a normal, expected condition, it's a sign something upstream is genuinely broken, an auth check that should have redirected but didn't, a database lookup silently failing, a race condition in how the session gets set. None of that gets surfaced. The page just quietly shows "Welcome, " with a blank name and no admin panel, and looks like a minor rendering glitch instead of the real bug it actually is.

Why This Is Worse Than It Sounds for the Admin Check Specifically

{user?.role === 'admin' && <AdminPanel />}

This line deserves particular attention. If user is unexpectedly undefined, user?.role evaluates to undefined, the comparison to 'admin' is false, and the admin panel correctly doesn't render. That specific outcome is safe, a broken session fails closed here, not open. But notice what's actually happening, a genuinely serious bug, the current user's identity failing to load at all, on a page that's supposed to require authentication, is being silently absorbed into the exact same code path as "this user is correctly not an admin." Both produce identical, unremarkable output. One of them is completely normal. The other represents your auth system genuinely malfunctioning, and nothing distinguishes them from each other anywhere in this code.

The Actual Distinction Worth Making Deliberately

Values that are legitimately, expectedly sometimes absent, an optional profile bio, an optional avatar image, a field that's genuinely allowed to not exist as part of normal, correct behavior. Optional chaining is exactly the right tool here.

Values that should always exist if everything upstream actually worked correctly, the current user on an authenticated route, a database record that was just confirmed to exist moments earlier, a required field on a validated form submission. Optional chaining on these doesn't handle an edge case gracefully, it hides a real failure by making it look identical to a normal, unremarkable state.

What to Do Instead for the Second Category

export default async function DashboardPage() {
  const session = await getSession();
  if (!session) {
    redirect('/login'); // handle the genuinely expected "not logged in" case explicitly
  }

  const user = await getUserData(session.userId);
  if (!user) {
    // session exists but the user record doesn't, this is a real, unexpected problem
    console.error('Session exists but user not found:', session.userId);
    throw new Error('User data could not be loaded'); // let it surface, don't hide it
  }

  return (
    <div>
      <h1>Welcome, {user.name}</h1>
      <p>Role: {user.role}</p>
      {user.role === 'admin' && <AdminPanel />}
    </div>
  );
}

No optional chaining needed anywhere past this point, because both genuinely expected absence cases, no session, get handled explicitly, with a real redirect and a real, loud error respectively, rather than silently smoothed over. Everything after those two checks can safely assume session and user are real, present values, because any case where they aren't has already been caught and surfaced, not quietly absorbed into a blank render.

The Actual Rule

Optional chaining should be a deliberate choice for values that are genuinely, normally allowed to be absent, not a reflexive habit applied to anything that might theoretically be undefined. For a value that represents a genuine invariant, something that should always be true if the rest of the system is working correctly, handle its absence explicitly, a redirect, a thrown error, a logged warning, something that actually surfaces the problem, rather than a ?. that quietly renders nothing and leaves the real bug invisible until someone notices the symptom much later, disconnected from its actual cause.

A Practical Way to Audit Your Own Code

For every ?. in a codebase, ask honestly, is this value legitimately allowed to be missing as part of normal, correct behavior, or would its absence here actually indicate something upstream is broken. The first case is optional chaining used correctly. The second is optional chaining quietly doing the opposite of what defensive code is supposed to do, hiding a real failure instead of catching it.

Go find the optional chains in your own codebase specifically sitting on values you'd genuinely be alarmed to discover were undefined, an authenticated user, a record that was just confirmed to exist. If any of those chains are just gracefully rendering blank instead of surfacing a real problem, that's worth fixing. Drop what you find in the comments.

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Anas, full-stack Next.js developer building SaaS products and premium templates. X: @ASheikh69751