The UX Decisions Hiding in Your Code

The UX Decisions Hiding in Your Code

A user opens your signup form. Name, email, password. Nothing complicated. Twelve seconds later they close the tab and never come back.

You didn't lose them to a competitor's better product. You lost them to a text input that didn't tell them why their password got rejected.

This happens millions of times a day, on forms and buttons and menus that engineers spent real time building. The code works. Nothing throws an error. And still, people leave.

That gap, between "the code works" and "the person could use it," is what UX actually is. This article walks through why that gap costs more than most teams think, using real cases and code you can run. Every code block below has a working twin at the bottom of this article, go break it.

The Fork: Two Signup Forms

Here's a form that looks like a hundred forms in production right now.

document.getElementById('signup-form').addEventListener('submit', async (e) => {
  e.preventDefault();
  const email = document.getElementById('email').value;
  const password = document.getElementById('password').value;
  
  // Validate
  if (password.length < 8) {
    alert('Password must be at least 8 characters');
    return;
  }
  
  // Submit
  const response = await fetch('/api/signup', {
    method: 'POST',
    body: JSON.stringify({ email, password })
  });
  
  if (response.ok) {
    window.location.href = '/dashboard';
  } else {
    alert('Something went wrong. Please try again.');
  }
});

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