Birthday Invitation Maker Methodology

How We Compose an Invitation

The maker is a theme-driven card renderer. You pick a theme, fill in five required fields, optionally add host + custom message + celebrant photo, and we render the card as HTML that can be exported as a PNG or animated GIF. The RSVP link is auto-composed so guests can track replies back to your theme.

theme       = partyThemes[selectedThemeId]    // 100 options
required    = { childName, age, partyDate, partyTime, venue }
optional    = { hostName?, customMessage?, celebrantImage?, rsvpContact? }

card        = InvitationCard({
                 theme, ...required, ...optional,
                 rsvpLink: `partygeniusai.com/tools/birthday-invitation-maker?theme=${themeId}`
               })

png export  = html2canvas(card) → Blob → download
gif export  = 20-frame capture loop with theme animation → encode → Blob

Required vs Optional Fields

Required fields are the minimum information a guest needs to decide whether and how to attend. Optional fields add polish but never block the render. If you leave them out, the layout adapts — no empty placeholders.

Theme Library

The maker pulls from our core theme library — the same 117 themes that power the /themes browser and the Theme Quiz. Each theme has its own color palette, emoji set, and animation beats, so every invitation feels specific rather than generic. You can also deep-link a theme via ?theme=unicorn-magic if you are coming from a blog post or RSVP page.

Why Templates Instead of AI

Birthday invitations are a trust product — the information has to be right, every time. Dates, times, and addresses do not tolerate hallucination. We chose a template renderer for three reasons:

• Deterministic output — the same inputs always produce the same card.
• Offline-friendly — the entire maker runs in your browser; your child's photo never leaves your device.
• Fast — rendering is instant; no API calls, no rate limits, no fees.

Sources

• Party Genius AI theme library (src/lib/themes/party-themes.ts) — 100 themes, each with unique color palette, emoji set, and animation art direction.
• Required-field list validated against 20 mainstream evite templates (Evite, Paperless Post, Greenvelope) — we shipped the intersection of fields they all require, plus venue which a surprising number omit by default.
• PNG render via html2canvas; GIF render via a 20-frame capture loop targeting the card root.

Edge Cases & Limitations

Very long venue strings or custom messages wrap inside the card — we do not truncate. Test the card preview before exporting; if it looks cramped, shorten the free-text field.

GIF export uses client-side encoding; older phones may hit memory ceilings. If the GIF fails, try PNG first — the PNG export has a much lighter memory footprint.

The RSVP link currently points back to the maker with the theme pre-selected; a full RSVP-management flow (guest list, tracking) is on the roadmap but not live.

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