frontend-slides

name frontend-slides description Create stunning, animation-rich HTML presentations from scratch or by converting PowerPoint files. Use when the user wants to build a presentation, convert a PPT/PPTX to web, or create slides for a talk/pitch. Helps non-designers discover their aesthetic through visual exploration rather than abstract choices. origin ECC Frontend Slides Create zero-dependency, animation-rich HTML presentations that run entirely in the browser. Inspired by the visual exploration approach showcased in work by zarazhangrui . When to Activate Creating a talk deck, pitch deck, workshop deck, or internal presentation Converting .ppt or .pptx slides into an HTML presentation Improving an existing HTML presentation's layout, motion, or typography Exploring presentation styles with a user who does not know their design preference yet Non-Negotiables Zero dependencies : default to one self-contained HTML file with inline CSS and JS. Viewport fit is mandatory : every slide must fit inside one viewport with no internal scrolling. Show, don't tell : use visual previews instead of abstract style questionnaires. Distinctive design : avoid generic purple-gradient, Inter-on-white, template-looking decks. Production quality : keep code commented, accessible, responsive, and performant. Before generating, read STYLE_PRESETS.md for the viewport-safe CSS base, density limits, preset catalog, and CSS gotchas. Workflow 1. Detect Mode Choose one path: New presentation : user has a topic, notes, or full draft PPT conversion : user has .ppt or .pptx Enhancement : user already has HTML slides and wants improvements 2. Discover Content Ask only the minimum needed: purpose: pitch, teaching, conference talk, internal update length: short (5-10), medium (10-20), long (20+) content state: finished copy, rough notes, topic only If the user has content, ask them to paste it before styling. 3. Discover Style Default to visual exploration. If the user already knows the desired preset, skip previews and use it directly. Otherwise: Ask what feeling the deck should create: impressed, energized, focused, inspired. Generate 3 single-slide preview files in .ecc-design/slide-previews/ . Each preview must be self-contained, show typography/color/motion clearly, and stay under roughly 100 lines of slide content. Ask the user which preview to keep or what elements to mix. Use the preset guide in STYLE_PRESETS.md when mapping mood to style. 4. Build the Presentation Output either: presentation.html [presentation-name].html Use an assets/ folder only when the deck contains extracted or user-supplied images. Required structure: semantic slide sections a viewport-safe CSS base from STYLE_PRESETS.md CSS custom properties for theme values a presentation controller class for keyboard, wheel, and touch navigation Intersection Observer for reveal animations reduced-motion support 5. Enforce Viewport Fit Treat this as a hard gate. Rules: every .slide must use height: 100vh; height: 100dvh; overflow: hidden; all type and spacing must scale with clamp() when content does not fit, split into multiple slides never solve overflow by shrinking text below readable sizes never allow scrollbars inside a slide Use the density limits and mandatory CSS block in STYLE_PRESETS.md . 6. Validate Check the finished deck at these sizes: 1920x1080 1280x720 768x1024 375x667 667x375 If browser automation is available, use it to verify no slide overflows and that keyboard navigation works. 7. Deliver At handoff: delete temporary preview files unless the user wants to keep them open the deck with the platform-appropriate opener when useful summarize file path, preset used, slide count, and easy theme customization points Use the correct opener for the current OS: macOS: open file.html Linux: xdg-open file.html Windows: start "" file.html PPT / PPTX Conversion For PowerPoint conversion: Prefer python3 with python-pptx to extract text, images, and notes. If python-pptx is unavailable, ask whether to install it or fall back to a manual/export-based workflow. Preserve slide order, speaker notes, and extracted assets. After extraction, run the same style-selection workflow as a new presentation. Keep conversion cross-platform. Do not rely on macOS-only tools when Python can do the job. Implementation Requirements HTML / CSS Use inline CSS and JS unless the user explicitly wants a multi-file project. Fonts may come from Google Fonts or Fontshare. Prefer atmospheric backgrounds, strong type hierarchy, and a clear visual direction. Use abstract shapes, gradients, grids, noise, and geometry rather than illustrations. JavaScript Include: keyboard navigation touch / swipe navigation mouse wheel navigation progress indicator or slide index reveal-on-enter animation triggers Accessibility use semantic structure ( main , section , nav ) keep contrast readable support keyboard-only navigation respect prefers-reduced-motion Content Density Limits Use these maxima unless the user explicitly asks for denser slides and readability still holds: Slide type Limit Title 1 heading + 1 subtitle + optional tagline Content 1 heading + 4-6 bullets or 2 short paragraphs Feature grid 6 cards max Code 8-10 lines max Quote 1 quote + attribution Image 1 image constrained by viewport Anti-Patterns generic startup gradients with no visual identity system-font decks unless intentionally editorial long bullet walls code blocks that need scrolling fixed-height content boxes that break on short screens invalid negated CSS functions like -clamp(...) Related ECC Skills frontend-patterns for component and interaction patterns around the deck liquid-glass-design when a presentation intentionally borrows Apple glass aesthetics e2e-testing if you need automated browser verification for the final deck Deliverable Checklist presentation runs from a local file in a browser every slide fits the viewport without scrolling style is distinctive and intentional animation is meaningful, not noisy reduced motion is respected file paths and customization points are explained at handoff