Bootstrap 5 Login and Register Form with Tabs
A login and registration card with pill-style tabs that switch between the two forms, floating labels and inline validation.
<section class="wdw-stage">
<div class="container" style="max-width:460px">
<div class="wdw-card p-4 p-sm-5">
<div class="text-center mb-4">
<span class="wdw-icon mb-3"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round"><rect x="4" y="11" width="16" height="10" rx="2"/><path d="M8 11V7a4 4 0 0 1 8 0v4"/></svg></span>
<h1 class="h3 wdw-heading mb-1" id="authTitle">Welcome back</h1>
<p class="wdw-muted mb-0" id="authSub">Log in to pick up where you left off.</p>
</div>
<ul class="nav nav-pills nav-fill auth-tabs rounded-pill p-1 mb-4" id="authTabs" role="tablist">
<li class="nav-item" role="presentation"><button class="nav-link active rounded-pill" id="tab-login" data-bs-toggle="pill" data-bs-target="#pane-login" type="button" role="tab" aria-controls="pane-login" aria-selected="true">Log in</button></li>
<li class="nav-item" role="presentation"><button class="nav-link rounded-pill" id="tab-register" data-bs-toggle="pill" data-bs-target="#pane-register" type="button" role="tab" aria-controls="pane-register" aria-selected="false">Register</button></li>
</ul>
<div class="tab-content">
<div class="tab-pane fade show active" id="pane-login" role="tabpanel" aria-labelledby="tab-login" tabindex="0">
<form class="auth-form" novalidate>
<div class="form-floating mb-3"><input type="email" class="form-control" id="lgEmail" placeholder="Email" autocomplete="email" required><label for="lgEmail">Email address</label><div class="invalid-feedback">Enter a valid email.</div></div>
<div class="form-floating mb-3"><input type="password" class="form-control" id="lgPass" placeholder="Password" autocomplete="current-password" required minlength="6"><label for="lgPass">Password</label><div class="invalid-feedback">Enter your password (6+ characters).</div></div>
<div class="d-flex justify-content-between align-items-center mb-4">
<div class="form-check mb-0"><input class="form-check-input" type="checkbox" id="lgRem"><label class="form-check-label" for="lgRem">Remember me</label></div>
<a href="#" class="small fw-semibold">Forgot password?</a>
</div>
<button class="btn btn-primary rounded-pill w-100" type="submit">Log in</button>
</form>
</div>
<div class="tab-pane fade" id="pane-register" role="tabpanel" aria-labelledby="tab-register" tabindex="0">
<form class="auth-form" novalidate>
<div class="form-floating mb-3"><input type="text" class="form-control" id="rgName" placeholder="Name" autocomplete="name" required><label for="rgName">Full name</label><div class="invalid-feedback">Please enter your name.</div></div>
<div class="form-floating mb-3"><input type="email" class="form-control" id="rgEmail" placeholder="Email" autocomplete="email" required><label for="rgEmail">Email address</label><div class="invalid-feedback">Enter a valid email.</div></div>
<div class="form-floating mb-4"><input type="password" class="form-control" id="rgPass" placeholder="Password" autocomplete="new-password" required minlength="8"><label for="rgPass">Password</label><div class="invalid-feedback">Use at least 8 characters.</div></div>
<button class="btn btn-primary rounded-pill w-100" type="submit">Create account</button>
</form>
</div>
</div>
<div class="alert alert-success d-none mt-3 mb-0" id="authOk" role="status">Success! You're all set.</div>
</div>
</div>
</section>
/* Web Designer Wall library style — shared base for every Bootstrap 5 snippet.
Indigo accent, Plus Jakarta Sans, soft cards, pill buttons. Works in light and dark. */
@import url("https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap");
:root,
[data-bs-theme="light"] {
--wdw-font: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
--bs-body-font-family: var(--wdw-font);
--bs-primary: #4f46e5;
--bs-primary-rgb: 79, 70, 229;
--bs-primary-text-emphasis: #3730a3;
--bs-primary-bg-subtle: #eef2ff;
--bs-primary-border-subtle: #c7d2fe;
--bs-link-color: #4f46e5;
--bs-link-color-rgb: 79, 70, 229;
--bs-link-hover-color: #4338ca;
--bs-link-hover-color-rgb: 67, 56, 202;
--bs-focus-ring-color: rgba(79, 70, 229, 0.25);
--bs-border-radius: 0.75rem;
--bs-border-radius-lg: 1rem;
--bs-border-radius-xl: 1.25rem;
--wdw-radius-card: 1.25rem;
--wdw-shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 16px 40px -16px rgba(16, 24, 40, 0.22);
--wdw-shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06), 0 4px 12px -4px rgba(16, 24, 40, 0.12);
--wdw-stage: #f5f6fb;
}
[data-bs-theme="dark"] {
--bs-primary: #818cf8;
--bs-primary-rgb: 129, 140, 248;
--bs-primary-text-emphasis: #c7d2fe;
--bs-primary-bg-subtle: rgba(129, 140, 248, 0.14);
--bs-primary-border-subtle: rgba(129, 140, 248, 0.35);
--bs-link-color: #a5b4fc;
--bs-link-color-rgb: 165, 180, 252;
--bs-link-hover-color: #c7d2fe;
--bs-link-hover-color-rgb: 199, 210, 254;
--bs-focus-ring-color: rgba(129, 140, 248, 0.35);
--wdw-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 40px -16px rgba(0, 0, 0, 0.7);
--wdw-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 12px -4px rgba(0, 0, 0, 0.5);
--wdw-stage: #0f1117;
}
body { font-family: var(--wdw-font); -webkit-font-smoothing: antialiased; }
/* Bootstrap compiles its blue into these components; point them at the accent. */
.btn-primary {
--bs-btn-bg: var(--bs-primary); --bs-btn-border-color: var(--bs-primary);
--bs-btn-hover-bg: #4338ca; --bs-btn-hover-border-color: #4338ca;
--bs-btn-active-bg: #3730a3; --bs-btn-active-border-color: #3730a3;
--bs-btn-disabled-bg: var(--bs-primary); --bs-btn-disabled-border-color: var(--bs-primary);
--bs-btn-focus-shadow-rgb: var(--bs-primary-rgb);
}
[data-bs-theme="dark"] .btn-primary { --bs-btn-color: #0f1117; --bs-btn-hover-bg: #a5b4fc; --bs-btn-hover-border-color: #a5b4fc; --bs-btn-hover-color: #0f1117; --bs-btn-active-color: #0f1117; }
.btn-outline-primary {
--bs-btn-color: var(--bs-primary); --bs-btn-border-color: var(--bs-primary);
--bs-btn-hover-bg: var(--bs-primary); --bs-btn-hover-border-color: var(--bs-primary);
--bs-btn-active-bg: var(--bs-primary); --bs-btn-active-border-color: var(--bs-primary);
--bs-btn-focus-shadow-rgb: var(--bs-primary-rgb);
}
.btn { --bs-btn-font-weight: 600; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: .5rem; }
.btn-sm { min-height: 36px; }
.form-control, .form-select { min-height: 44px; border-radius: .75rem; }
.form-control:focus, .form-select:focus, .form-check-input:focus { border-color: rgba(var(--bs-primary-rgb), .6); box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.form-check-input:checked { background-color: var(--bs-primary); border-color: var(--bs-primary); }
.nav-pills { --bs-nav-pills-link-active-bg: var(--bs-primary); }
.nav { --bs-nav-link-color: var(--bs-secondary-color); --bs-nav-link-hover-color: var(--bs-emphasis-color); }
.pagination { --bs-pagination-active-bg: var(--bs-primary); --bs-pagination-active-border-color: var(--bs-primary); --bs-pagination-color: var(--bs-body-color); --bs-pagination-focus-box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.progress, .progress-stacked { --bs-progress-bar-bg: var(--bs-primary); }
.list-group { --bs-list-group-active-bg: var(--bs-primary); --bs-list-group-active-border-color: var(--bs-primary); }
.dropdown-menu { --bs-dropdown-link-active-bg: var(--bs-primary); border-radius: .875rem; box-shadow: var(--wdw-shadow-sm); }
.accordion { --bs-accordion-active-bg: var(--bs-primary-bg-subtle); --bs-accordion-active-color: var(--bs-primary-text-emphasis); --bs-accordion-btn-focus-box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.badge { font-weight: 600; }
/* Library building blocks — use these instead of re-inventing them per snippet. */
.wdw-stage { min-height: 100vh; display: flex; align-items: center; background: var(--wdw-stage); padding-block: 3rem; }
.wdw-card { background: var(--bs-body-bg); border: 1px solid var(--bs-border-color-translucent); border-radius: var(--wdw-radius-card); box-shadow: var(--wdw-shadow); }
.wdw-card-sm { background: var(--bs-body-bg); border: 1px solid var(--bs-border-color-translucent); border-radius: 1rem; box-shadow: var(--wdw-shadow-sm); }
.wdw-aurora { position: relative; color: #fff; background: radial-gradient(60% 55% at 100% 0, #818cf8 0, transparent 70%), radial-gradient(65% 60% at 0 100%, #ec4899 0, transparent 65%), #1e1b4b; }
.wdw-eyebrow { display: inline-block; font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--bs-primary); }
.wdw-heading { font-weight: 800; letter-spacing: -.02em; color: var(--bs-emphasis-color); }
.wdw-muted { color: var(--bs-secondary-color); }
.wdw-icon { width: 2.75rem; height: 2.75rem; flex: none; display: inline-flex; align-items: center; justify-content: center; border-radius: .875rem; background: var(--bs-primary-bg-subtle); color: var(--bs-primary); }
/* Component */
.auth-tabs{background:var(--bs-secondary-bg);--bs-nav-link-padding-y:.6rem}
.auth-tabs .nav-link{font-weight:700;min-height:44px}
.auth-tabs .nav-link.active{box-shadow:var(--wdw-shadow-sm)}
[data-bs-theme="dark"] .auth-tabs .nav-link.active{color:#0f1117}
.auth-tabs .nav-link:focus-visible{outline:2px solid var(--bs-primary);outline-offset:2px}
.tab-content .tab-pane{transition:opacity .2s}
(function initAuthTabs() {
var tabs = document.getElementById('authTabs');
var title = document.getElementById('authTitle');
var sub = document.getElementById('authSub');
var ok = document.getElementById('authOk');
if (!tabs) return;
var copy = {
'tab-login': ['Welcome back', 'Log in to pick up where you left off.'],
'tab-register': ['Create your account', 'Start your free 14-day trial today.']
};
tabs.addEventListener('shown.bs.tab', function (e) {
var c = copy[e.target.id];
if (!c) return;
title.textContent = c[0];
sub.textContent = c[1];
ok.classList.add('d-none');
});
document.querySelectorAll('.auth-form').forEach(function (form) {
form.addEventListener('submit', function (e) {
e.preventDefault();
form.classList.add('was-validated');
ok.classList.toggle('d-none', !form.checkValidity());
});
});
})();
Built on Bootstrap 5.3.8 with plain JavaScript — no jQuery. Supports light and dark mode via data-bs-theme.