Bootstrap 5 Blog Comments Section
A blog comment section with a composer, avatar cards, an author badge, a nested reply thread, like buttons with a visible liked state, and inline reply boxes.
<section class="wdw-stage cm-stage align-items-start align-items-lg-center">
<div class="container" style="max-width: 720px;">
<div class="mb-3"><span class="wdw-eyebrow">Discussion</span><h1 class="wdw-heading h3 mb-0 mt-1" id="cm-count" aria-live="polite">3 comments</h1></div>
<form class="wdw-card p-3 mb-3 cm-composer" id="cm-form" data-author="You" novalidate>
<div class="d-flex gap-3 align-items-start">
<img class="cm-avatar" src="https://i.pravatar.cc/96?img=47" width="48" height="48" alt="Your profile picture">
<div class="flex-grow-1 d-flex flex-column flex-sm-row gap-2 align-items-sm-start">
<label for="cm-text" class="visually-hidden">Leave a comment</label>
<textarea class="form-control cm-textarea" id="cm-text" rows="1" placeholder="Share your thoughts..." required style="height:auto;min-height:44px;"></textarea>
<button type="submit" class="btn btn-primary rounded-pill px-4 text-nowrap">Post comment</button>
</div>
</div>
</form>
<div class="d-grid gap-3" id="cm-list">
<article class="wdw-card-sm p-3 cm-item" data-comment data-author="John Doe">
<div class="d-flex gap-3">
<img class="cm-avatar" src="https://i.pravatar.cc/96?img=12" width="48" height="48" alt="John Doe">
<div class="flex-grow-1 min-w-0">
<div class="d-flex flex-wrap align-items-baseline gap-2"><h2 class="h6 fw-bold mb-0">John Doe</h2><span class="small wdw-muted">2 days ago</span></div>
<p class="mt-1 mb-2">Really clear walkthrough, thank you. The dark mode part finally made the colour tokens click for me.</p>
<div class="cm-actions d-flex gap-2 small">
<button type="button" class="cm-act" data-like aria-pressed="false"><svg class="cm-ico" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M12 21s-7.500-4.600-9.300-9.200C1.500 8.600 3.400 5 7 5c2 0 3.400 1 5 3 1.600-2 3-3 5-3 3.600 0 5.500 3.600 4.300 6.800C19.500 16.400 12 21 12 21Z"/></svg><span>Like</span> <span data-n>4</span></button>
<button type="button" class="cm-act" data-reply><svg class="cm-ico" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m9 14-5-5 5-5"/><path d="M4 9h10a6 6 0 0 1 6 6v3"/></svg><span>Reply</span></button>
</div>
<div class="cm-thread d-grid gap-3 mt-3">
<article class="cm-reply" data-comment data-author="Albert Arja">
<div class="d-flex gap-3">
<img class="cm-avatar cm-avatar-sm" src="https://i.pravatar.cc/96?img=32" width="36" height="36" alt="Albert Arja">
<div class="flex-grow-1 min-w-0">
<div class="d-flex flex-wrap align-items-baseline gap-2"><h3 class="h6 fw-bold mb-0">Albert Arja</h3><span class="badge bg-primary-subtle text-primary-emphasis rounded-pill">Author</span><span class="small wdw-muted">1 day ago</span></div>
<p class="mt-1 mb-2">Glad it helped! I will add a dark mode variant next week.</p>
<div class="cm-actions d-flex gap-2 small">
<button type="button" class="cm-act" data-like aria-pressed="false"><svg class="cm-ico" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M12 21s-7.500-4.600-9.300-9.200C1.500 8.600 3.400 5 7 5c2 0 3.400 1 5 3 1.600-2 3-3 5-3 3.600 0 5.500 3.600 4.300 6.800C19.500 16.400 12 21 12 21Z"/></svg><span>Like</span> <span data-n>11</span></button>
<button type="button" class="cm-act" data-reply><svg class="cm-ico" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m9 14-5-5 5-5"/><path d="M4 9h10a6 6 0 0 1 6 6v3"/></svg><span>Reply</span></button>
</div>
</div>
</div>
</article>
</div>
</div>
</div>
</article>
<article class="wdw-card-sm p-3 cm-item" data-comment data-author="Robert Hale">
<div class="d-flex gap-3">
<img class="cm-avatar" src="https://i.pravatar.cc/96?img=15" width="48" height="48" alt="Robert Hale">
<div class="flex-grow-1 min-w-0">
<div class="d-flex flex-wrap align-items-baseline gap-2"><h2 class="h6 fw-bold mb-0">Robert Hale</h2><span class="small wdw-muted">2 months ago</span></div>
<p class="mt-1 mb-2">Works great on mobile too. Dropped it straight into our blog template.</p>
<div class="cm-actions d-flex gap-2 small">
<button type="button" class="cm-act" data-like aria-pressed="false"><svg class="cm-ico" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M12 21s-7.500-4.600-9.300-9.200C1.500 8.600 3.400 5 7 5c2 0 3.400 1 5 3 1.600-2 3-3 5-3 3.600 0 5.500 3.600 4.300 6.800C19.500 16.400 12 21 12 21Z"/></svg><span>Like</span> <span data-n>2</span></button>
<button type="button" class="cm-act" data-reply><svg class="cm-ico" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m9 14-5-5 5-5"/><path d="M4 9h10a6 6 0 0 1 6 6v3"/></svg><span>Reply</span></button>
</div>
<div class="cm-thread d-grid gap-3 mt-3 d-none"></div>
</div>
</div>
</article>
</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 */
.cm-stage { padding-block: 1.5rem; }
.min-w-0 { min-width: 0; }
.cm-avatar { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; flex: none; box-shadow: 0 0 0 3px var(--bs-body-bg), 0 0 0 4px var(--bs-border-color); }
.cm-avatar-sm { width: 36px; height: 36px; }
.cm-textarea { resize: none; border-radius: .875rem; }
.cm-actions { margin: -.25rem 0 -.5rem -.5rem; }
.cm-act { display: inline-flex; align-items: center; gap: .375rem; background: none; border: 0; padding: .5rem; min-height: 44px; font-weight: 600; color: var(--bs-secondary-color); border-radius: .75rem; transition: color .15s, background-color .15s; }
.cm-act:hover { color: var(--bs-primary); background: var(--bs-primary-bg-subtle); }
.cm-act:focus-visible { color: var(--bs-primary); outline: 0; box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.cm-act[aria-pressed="true"] { color: var(--bs-primary); }
.cm-act[aria-pressed="true"] .cm-ico { fill: currentColor; animation: cm-pop .25s ease; }
.cm-thread { border-left: 2px solid var(--bs-primary-border-subtle); padding-left: 1rem; }
.cm-thread:empty { display: none; }
.cm-replybox { margin-top: .75rem; margin-bottom: .25rem; }
.cm-item { animation: cm-in .3s ease both; }
@keyframes cm-in { from { opacity: 0; transform: translateY(8px); } }
@keyframes cm-pop { 50% { transform: scale(1.25); } }
@media (max-width: 575.98px) {
.cm-composer .cm-avatar { width: 36px; height: 36px; }
.cm-item > .d-flex { gap: .75rem !important; }
.cm-item > .d-flex > .cm-avatar { width: 40px; height: 40px; }
.cm-thread { padding-left: .75rem; }
}
@media (prefers-reduced-motion: reduce) { .cm-item, .cm-act .cm-ico { animation: none !important; } }
(function () {
var HEART = '<svg class="cm-ico" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M12 21s-7.500-4.600-9.300-9.200C1.500 8.600 3.400 5 7 5c2 0 3.400 1 5 3 1.600-2 3-3 5-3 3.600 0 5.500 3.600 4.300 6.800C19.500 16.400 12 21 12 21Z"/></svg>';
var REPLY = '<svg class="cm-ico" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m9 14-5-5 5-5"/><path d="M4 9h10a6 6 0 0 1 6 6v3"/></svg>';
function escapeHtml(s) {
return s.replace(/[&<>"]/g, function (c) { return { '&': '&', '<': '<', '>': '>', '"': '"' }[c]; });
}
function updateCount() {
var n = document.querySelectorAll('#cm-list [data-comment]').length;
var el = document.getElementById('cm-count');
if (el) el.textContent = n + (n === 1 ? ' comment' : ' comments');
}
function buildComment(author, avatar, text, isReply) {
var el = document.createElement('article');
el.setAttribute('data-comment', ''); el.setAttribute('data-author', author);
el.className = isReply ? 'cm-reply' : 'wdw-card-sm p-3 cm-item';
var size = isReply ? 36 : 48, h = isReply ? 'h3' : 'h2', safe = escapeHtml(author);
el.innerHTML = '<div class="d-flex gap-3"><img class="cm-avatar' + (isReply ? ' cm-avatar-sm' : '') + '" src="' + escapeHtml(avatar) + '" width="' + size + '" height="' + size + '" alt="' + safe + '"><div class="flex-grow-1 min-w-0"><div class="d-flex flex-wrap align-items-baseline gap-2"><' + h + ' class="h6 fw-bold mb-0">' + safe + '</' + h + '><span class="small wdw-muted">Just now</span></div><p class="mt-1 mb-2"></p><div class="cm-actions d-flex gap-2 small"><button type="button" class="cm-act" data-like aria-pressed="false">' + HEART + '<span>Like</span> <span data-n>0</span></button><button type="button" class="cm-act" data-reply>' + REPLY + '<span>Reply</span></button></div>' + (isReply ? '' : '<div class="cm-thread d-grid gap-3 mt-3 d-none"></div>') + '</div></div>';
el.querySelector('p').textContent = text;
return el;
}
function me() {
var form = document.getElementById('cm-form');
var img = form && form.querySelector('.cm-avatar');
return { name: (form && form.dataset.author) || 'You', avatar: img ? img.getAttribute('src') : '' };
}
function initLikes() {
var list = document.getElementById('cm-list');
if (!list) return;
list.addEventListener('click', function (e) {
var btn = e.target.closest('[data-like]');
if (!btn) return;
var on = btn.getAttribute('aria-pressed') === 'true';
var n = btn.querySelector('[data-n]');
n.textContent = +n.textContent + (on ? -1 : 1);
btn.setAttribute('aria-pressed', String(!on));
});
}
function initReplies() {
var list = document.getElementById('cm-list');
if (!list) return;
list.addEventListener('click', function (e) {
var btn = e.target.closest('[data-reply]');
if (!btn) return;
var comment = btn.closest('[data-comment]');
var body = btn.closest('.cm-actions').parentNode;
var box = body.querySelector(':scope > .cm-replybox');
if (box) { box.remove(); btn.setAttribute('aria-expanded', 'false'); return; }
var name = comment.dataset.author;
box = document.createElement('form');
box.className = 'cm-replybox d-flex flex-column flex-sm-row gap-2';
box.noValidate = true;
box.innerHTML = '<label class="visually-hidden">Reply to ' + escapeHtml(name) + '</label><textarea class="form-control cm-textarea" rows="1" required placeholder="Reply to ' + escapeHtml(name) + '..." style="height:auto;min-height:44px;"></textarea><div class="d-flex gap-2"><button type="submit" class="btn btn-primary btn-sm rounded-pill px-3 text-nowrap">Post reply</button><button type="button" class="btn btn-outline-secondary btn-sm rounded-pill px-3" data-cancel>Cancel</button></div>';
var ta = box.querySelector('textarea');
ta.id = 'cm-r' + Date.now();
box.querySelector('label').setAttribute('for', ta.id);
body.querySelector('.cm-actions').after(box);
btn.setAttribute('aria-expanded', 'true');
ta.focus();
box.querySelector('[data-cancel]').addEventListener('click', function () { box.remove(); btn.setAttribute('aria-expanded', 'false'); btn.focus(); });
box.addEventListener('submit', function (ev) {
ev.preventDefault();
var v = ta.value.trim();
if (!v) { ta.focus(); return; }
var top = comment.closest('.cm-item');
var thread = top.querySelector('.cm-thread');
var user = me();
var reply = buildComment(user.name, user.avatar, v, true);
thread.classList.remove('d-none');
thread.appendChild(reply);
box.remove(); btn.setAttribute('aria-expanded', 'false');
updateCount();
reply.querySelector('[data-like]').focus();
});
});
}
function initCommentForm() {
var form = document.getElementById('cm-form');
var list = document.getElementById('cm-list');
var text = document.getElementById('cm-text');
if (!form || !list || !text) return;
form.addEventListener('submit', function (e) {
e.preventDefault();
var v = text.value.trim();
if (!v) { text.focus(); return; }
var user = me();
list.prepend(buildComment(user.name, user.avatar, v, false));
text.value = '';
updateCount();
});
}
initLikes(); initReplies(); initCommentForm();
})();
Built on Bootstrap 5.3.8 with plain JavaScript — no jQuery. Supports light and dark mode via data-bs-theme.
