# Offline banner Subtle web animation sketch from [https://mighil.com/animations](https://mighil.com/animations). - **Live demo:** https://mighil.com/animations/offline-banner - **Standalone HTML:** https://mighil.com/animations/offline-banner?download=1 - **This file:** https://mighil.com/animations/offline-banner/offline-banner.md - **Technique:** `status` ## What it does Thin strip when you go offline. No modal. ## Instructions for AI / coding agents Implement this micro-interaction in the user's stack (vanilla HTML, React, Vue, Svelte, etc.). 1. Use the **HTML** as the DOM structure (adapt JSX/templates as needed; keep class names and ids). 2. Include the **Theme** CSS (or map the same variables into the host design system). It switches light/dark with `prefers-color-scheme`. 3. Apply the **CSS** as-is when possible. It uses `var(--text-color)`, `var(--heading-color)`, `var(--background-color)`, etc. from the theme so both modes work. 4. Run the **JavaScript** after the markup mounts. Prefer `DOMContentLoaded` or a framework `useEffect` / `onMount`. 5. Keep motion respectful of `prefers-reduced-motion` if the snippet already checks it. 6. Do not depend on mighil.com runtime or fonts. Theme variables are enough for color. 7. If porting to a component, expose the interactive root via a ref and preserve accessibility attributes (`aria-*`, `role`, `button` types). ## Theme (auto light / dark) ```css /* Auto light / dark — follows prefers-color-scheme */ :root{ color-scheme: light dark; --text-color: hsl(0, 0%, 18%); --heading-color: hsl(0, 0%, 18%); --background-color: hsl(0, 0%, 99%); --bg-color: hsl(0, 0%, 99%); --link-color: hsl(0, 0%, 18%); --visited-color: hsl(0, 0%, 18%); --blockquote-color: hsl(0, 0%, 18%); --code-bg-color: hsl(0, 0%, 95%); --code-color: hsl(0, 0%, 18%); --sub-color: hsl(0, 0%, 29%); } @media (prefers-color-scheme: dark){ :root{ --text-color: hsl(35, 25%, 85%); --heading-color: hsl(35.2, 32.6%, 82.5%); --background-color: hsl(60, 2.2%, 8.8%); --bg-color: hsl(60, 2.2%, 8.8%); --link-color: hsl(34.7, 55.3%, 79.8%); --visited-color: hsla(34.7, 55.3%, 79.8%, 0.85); --blockquote-color: hsl(35, 30%, 75%); --code-bg-color: hsl(30, 5%, 7.8%); --code-color: limegreen; --sub-color: hsla(34.7, 24.7%, 84.9%, 0.78); } } ``` ## HTML ```html
You’re offline. Changes will sync later
``` ## CSS ```css .offline-stage{width:min(100%,300px);display:flex;flex-direction:column;gap:10px;align-items:stretch} .offline-banner{ height:36px;display:flex;align-items:center;justify-content:center; border-radius:8px;font-size:.82rem;font-weight:500; border:1px solid color-mix(in srgb,var(--text-color) 12%,transparent); background:color-mix(in srgb,var(--text-color) 5%,transparent); opacity:0;transform:translateY(-8px);pointer-events:none; transition:opacity .28s ease,transform .32s cubic-bezier(.22,1,.36,1); } .offline-stage.is-off .offline-banner{opacity:1;transform:none;pointer-events:auto} .offline-toggle{ appearance:none;-webkit-appearance:none;align-self:flex-start; height:34px;padding:0 12px;border-radius:8px;cursor:pointer; font:inherit;font-size:.82rem;font-weight:500;line-height:1;color:inherit; border:1px solid color-mix(in srgb,var(--text-color) 14%,transparent); background:color-mix(in srgb,var(--text-color) 4%,transparent); } @media (prefers-reduced-motion: reduce){ .grow-link::after,.wipe,.wipe .b,.shuffle .card,.odo-digit > b,.flap-reel,.step-node,.step-line > i, .switch,.switch::after,.copy-btn .c-idle,.copy-btn .c-done,.field label,.tip-bubble,.chip,.like-btn svg, .disc-btn svg,.disc-panel,.snack,.save-btn,.ux-box,.seg-pill,.soft-tabs-ink,.list-actions,.success-banner,.search-clear,.pin-btn svg,.submit-ring rect, .hold-btn .hold-fill,.toast,.menu-btn .menu-line,.stars button,.conn,.retry-btn,.sort-item,.mute-btn .wave,.mute-btn .x-line,.wizard-dots span,.cart-badge,.range-bubble, .filter-list li,.upload-bar > i,.quota-track > i,.quota-tip,.splitbtn-toggle svg,.splitbtn-menu,.presence-dot, .draft-banner,.tag-chip,.empty-state,.empty-item,.deadline,.deadline-clock,.deadline-track > i,.edge-fade-mask,.dirty-bar,.seen-ticks path,.nudge-field,.stack-card, .blur-line,.xface span,.magnet-chip,.confirm-btn,.confirm-btn span,.offline-banner,.sort-flip-btn svg,.sort-flip-list li,.react-fan,.react-fan button,.sticky-cta, .pw-toggle .pw-eye,.pw-toggle .pw-slash,.otp input,.exp-search,.exp-search input,.ok-field input,.ok-field .ok-check,.unread-dot,.unread-check,.unread-row,.sync-label,.sync-btn .sync-arrows,.sync-btn .sync-check, .inline-edit .ie-title,.inline-edit .ie-rename,.inline-edit .ie-panel,.inline-edit .ie-input,.inline-edit .ie-bar, .ghost-wrap .ghost-hint,.ghost-wrap .ghost-key,.cmd-palette,.cmd-palette li,.cmd-stage::before,.crumb-mid,.crumb-more,.diff-add,.diff-add > .diff-add-inner,.slot > i,.zoom-thumb,.zoom-full,.zoom-caption, .bulk-bar,.bulk-check svg,.bulk-row,.env-switch .env-ink,.env-switch button,.invite-btn .invite-idle,.invite-btn .invite-done,.flag-row,.flag-sw,.flag-sw::after,.deploy-node,.deploy-node i,.deploy-wire > b,.ws-ink,.ws-item .ws-check,.thread,.thread-body,.thread-resolve svg, .unfurl-card,.unfurl-thumb,.seat,.form-prog-bar > i,.form-prog-field,.form-prog-field svg,.mention b,.glyph-tile path,.glyph-tile line,.glyph-tile circle{transition:none!important} .offline-stage.is-off .offline-banner,.react-wrap.is-open .react-fan,.react-wrap.is-open .react-fan button,.sticky-stage.is-near .sticky-cta{opacity:1;transform:none} } ``` ## JavaScript ```js // Offline banner const offlineStage = document.getElementById('offline-stage'); const offlineToggle = document.getElementById('offline-toggle'); if (offlineStage && offlineToggle) { offlineToggle.addEventListener('click', () => { const off = offlineStage.classList.toggle('is-off'); offlineToggle.textContent = off ? 'Go online' : 'Go offline'; }); } ``` --- _Source: https://mighil.com/animations/offline-banner_