Alert Dialog Danger
A copy-paste modals & overlays component in pure HTML & CSS. Zero dependencies, framework-agnostic, MIT-licensed.
Modals & OverlaysHTMLCSSany framework
Copy into your project
HTML
<div class="nuda-mdx-alertdanger" role="alertdialog" aria-modal="true" aria-labelledby="alert-title" aria-describedby="alert-desc">
<div class="nuda-mdx-alertdanger__strip"></div>
<div class="nuda-mdx-alertdanger__inner">
<div class="nuda-mdx-alertdanger__icon">
<svg width="20" height="20" viewBox="0 0 24 24" fill="none">
<path d="M12 2 L22 20 H2 Z" stroke="#ff6b6b" stroke-width="1.6" stroke-linejoin="round"/>
<path d="M12 9v5" stroke="#ff6b6b" stroke-width="2" stroke-linecap="round"/>
<circle cx="12" cy="17" r="1" fill="#ff6b6b"/>
</svg>
</div>
<div>
<p class="nuda-mdx-alertdanger__title" id="alert-title">Permanent deletion</p>
<p class="nuda-mdx-alertdanger__body" id="alert-desc">All data will be lost. You cannot undo this.</p>
</div>
</div>
<div class="nuda-mdx-alertdanger__actions">
<button class="nuda-mdx-alertdanger__btn nuda-mdx-alertdanger__btn--ghost">Cancel</button>
<button class="nuda-mdx-alertdanger__btn nuda-mdx-alertdanger__btn--destroy">Yes, delete all</button>
</div>
</div>CSS
.nuda-mdx-alertdanger {
background: #141414;
border: 1px solid rgba(255,107,107,.22);
border-radius: 14px;
overflow: hidden;
max-width: 240px;
margin: auto;
animation: _nuda-mdxAlertIn .35s ease-out both;
}
.nuda-mdx-alertdanger__strip {
height: 3px;
background: linear-gradient(90deg,#ff6b6b,#ff4444);
}
.nuda-mdx-alertdanger__inner {
display: flex;
align-items: flex-start;
gap: .6rem;
padding: .8rem .85rem .5rem;
}
.nuda-mdx-alertdanger__icon {
flex-shrink: 0;
width: 36px;
height: 36px;
border-radius: 50%;
background: rgba(255,107,107,.1);
display: flex;
align-items: center;
justify-content: center;
}
.nuda-mdx-alertdanger__title {
margin: 0 0 .18rem;
font-size: .72rem;
font-weight: 700;
color: #fafafa;
}
.nuda-mdx-alertdanger__body {
margin: 0;
font-size: .62rem;
color: #777;
line-height: 1.45;
}
.nuda-mdx-alertdanger__actions {
display: flex;
gap: .4rem;
justify-content: flex-end;
padding: .55rem .85rem .75rem;
}
.nuda-mdx-alertdanger__btn {
border: none;
border-radius: 8px;
padding: .36rem .7rem;
font-size: .65rem;
font-weight: 600;
cursor: pointer;
transition: opacity .15s;
}
.nuda-mdx-alertdanger__btn:hover {
opacity: .8;
}
.nuda-mdx-alertdanger__btn--ghost {
background: rgba(255,255,255,.06);
color: #cfcfcf;
}
.nuda-mdx-alertdanger__btn--destroy {
background: #ff6b6b;
color: #fff;
}
@keyframes _nuda-mdxAlertIn {
from {
opacity: 0;
transform: scale(.94) translateY(8px);
}
to {
opacity: 1;
transform: scale(1) translateY(0);
}
}
@media (prefers-reduced-motion:reduce) {
.nuda-mdx-alertdanger {
animation: none;
}
}
How to use Alert Dialog Danger
Paste the HTML where you need it and the CSS into a global stylesheet (or a <style> tag). Every class is prefixed nuda- so it never collides with Tailwind or your own styles. Tweak the CSS custom properties to match your design system.
Works in React, Vue, Svelte, Astro, Next.js, Nuxt, Laravel Blade, Django, Rails — or a single .html file. No npm install, no build step.