For many developers, preparing a presentation is a tedious detour from writing code. Traditional slide software breaks the developer workflow, making version control cumbersome and embedding live code difficult. Developers have long needed a presentation tool that speaks their language (markdown, component-driven design, and command-line agility). Slidev solves this problem with a developer-centric approach to crafting and delivering presentations.

With 48,624 stars on GitHub, Slidevjs/slidev has become a community-validated standard for technical presentations. This star count signals widespread adoption and trust within the developer community, showing the tool is useful, stable, and adheres to modern development practices.

This article covers Slidev's design philosophy, its technical architecture (built on TypeScript, Vue, and Vite), and how it differs from conventional tools. It includes a practical use-case example showing how a developer uses Slidev, then explains how to build and extend the project, and finally guides on contributing to the open-source initiative. This is a technical deep dive for working developers looking to integrate a code-first presentation workflow into their toolkit.

The Core Philosophy: Explaining the Why

Slidev's philosophy centers on optimizing the presentation creation experience for developers. It proposes that presentation content should be treated like code (version controlled, text-editable, and easily shareable). This challenges the graphical WYSIWYG paradigm of traditional presentation software. Slidev aims to enable developers to create visually appealing, interactive, and technically precise presentations using tools and workflows they already understand: markdown for content, JavaScript/TypeScript for logic, and modern web frameworks for UI.

Slidev chooses not to be a comprehensive graphic design suite. It does not aim to replicate the layout controls or advanced animation timelines found in tools like PowerPoint or Keynote. Instead, it delegates visual customization and complex animations to the web platform itself (CSS and Vue). This design decision is a trade-off: it sacrifices the immediate drag-and-drop visual design experience for flexibility and extensibility within the web ecosystem. Developers who value direct manipulation over code-based styling might initially find this a steeper learning curve, but those comfortable with web development gain ultimate control.

This trade-off shows in Slidev's approach to themes and layouts. While it provides defaults through its theme system, developers can customize these using Vue components and CSS. This aligns with the "batteries included, but replaceable" ethos common in modern web frameworks. Using Markdown as the primary content source is central to its developer-first approach. Markdown provides a fast, concise way to structure content, ensures readability, and integrates with version control systems. The reasoning is clear: developers spend their lives in text editors; making presentations text-based removes a cognitive and workflow barrier.

Slidev differs from tools like reveal.js by integrating a modern development server (Vite) and reactive framework (Vue) from the start. This provides a superior developer experience with features like instant hot module replacement (HMR), component-based layouts, and full TypeScript support. While reveal.js offers Markdown support, its extensibility often relies on jQuery or vanilla JavaScript plugins, feeling less integrated into a modern component-driven workflow. Slidev applies the power of a modern web application specifically to presentations, making it a "web app for your slides" rather than just a JavaScript library for static HTML slides. This means developers can embed live Vue components, interactive charts, or even external web applications directly into their slides, capabilities that are more challenging to achieve with older presentation libraries or traditional software.

A Practical Use-Case Walkthrough

Consider a senior frontend developer tasked with presenting a new component library's architecture to their team. Their starting state involves Markdown files describing API usage, code snippets from the actual library, and design mockups. Manually converting this to a traditional slide deck would mean copy-pasting code, recreating diagrams, and dealing with inconsistent formatting.

With Slidev, the process is streamlined:

  1. Project Setup: The developer initializes a new Slidev project directly within their component library's monorepo or as a standalone project.

    
        pnpm create slidev my-component-library-slides

        cd my-component-library-slides

        ```


2.  **Content Creation (Markdown-first):** They create `slides.md`, importing relevant sections directly or copy-pasting code snippets, using Markdown's fenced code blocks for syntax highlighting. Each slide is separated by `---`.

```markdown
---
# My Component Library: An Architectural Overview

Welcome to the new `@my-org/components` library!

---
# Core Principles

- **Modularity:** Each component is self-contained.
- **Accessibility:** Built with WCAG in mind.
- **Performance:** Optimized rendering and minimal bundles.

---
# Example: Button Component

```vue
    

    

        import { defineProps } from 'vue';


        type ButtonVariant = 'primary' | 'secondary' | 'ghost';


        interface Props {

          variant?: ButtonVariant;

        }


        const props = withDefaults(defineProps<Props>(), {

          variant: 'primary',

        });
    

    

        .btn {

          /* ... basic styles ... */

          padding: 0.5rem 1rem;

          border-radius: 4px;

          cursor: pointer;

        }

        .btn--primary { background-color: #007bff; color: white; border: none; }

        .btn--secondary { background-color: #6c757d; color: white; border: none; }

        .btn--ghost { background-color: transparent; color: #007bff; border: 1px solid #007bff; }
    

        ```


        ---


        # Live Demo: Interactive Props

     


        ---


        # Q&A


        ```


3.  **Custom Layouts and Components:** For the live demo slide, they realize a custom interactive component (`MyButtonDemo.vue`) would be ideal. They place this component in a `components` directory and use it directly in their Markdown. They might also define a custom `layout` for the Q&A slide to feature a larger font and their company logo.


4.  **Theming and Styling:** To match their company's branding, they either pick an existing Slidev theme or create a minimal `slidev.config.ts` to adjust colors and fonts.

```ts
// slidev.config.ts
import { defineSlidevConfig } from '@slidev/cli'

export default defineSlidevConfig({
  theme: 'default', // Or a custom theme
  fonts: {
    sans: 'Inter',
    serif: 'Georgia',
    mono: 'Fira Code',
  },
  colors: {
    primary: '#007bff',
    secondary: '#6c757d',
    background: '#f8f9fa',
    text: '#212529',
  },
  // ... other configurations like markdown-it plugins, highlighters
})

    1. Development Server: They run pnpm dev to get a live preview, benefiting from Vite's instant hot module replacement as they refine content, styles, and custom components.

    2. Export and Delivery: Once finalized, they run pnpm build to generate a static HTML/CSS/JS presentation, ready for deployment to any web server or GitHub Pages. For offline presentations, they can use pnpm export to generate a PDF.

    The result is a professional, interactive presentation authored using familiar text-based tools, version-controlled alongside the component library it describes, and delivered as a performant web application. This reduces overhead for technical presentations, allowing developers to focus on content and code rather than fighting their presentation tool.

    Under the Hood: The Actual Tech Stack

    Slidev's technical foundation uses modern web technologies to provide a robust and flexible platform for presentations. The project uses TypeScript, ensuring type safety and improving developer experience. At its core, Slidev leverages Vue.js (Vue 3) for its reactive component model and Vite as its fast build tool and development server. This combination provides an efficient development workflow, complete with instant hot module replacement.

    The project's content is structured around Markdown files, typically slides.md or multiple .md files within a dedicated slides directory. This Markdown is parsed internally by markdown-it, an extensible Markdown parser that allows for custom syntax, plugins, and features like directives for layouts and components. Global configurations, theme selections, and custom styling are managed through a slidev.config.ts file, a TypeScript-enabled configuration entry point that integrates with Vite's ecosystem.

    Slidev is structured as a monorepo, managed with pnpm workspaces. This architecture separates concerns into distinct packages:

    • packages/slidev: The core CLI and backend logic that orchestrates the presentation.
    • packages/client: The frontend application, built with Vue and Vite, that renders the slides in the browser.
    • packages/theme-default: The default theme, providing a baseline for styling and layouts.
    • packages/create-slidev: A utility for quickly scaffolding new Slidev projects.

    This modularity allows for clear separation between the core engine, the client-side renderer, and thematic elements, making the project maintainable and extensible.

    For build and deployment, Slidev uses Vite's capabilities for generating optimized static assets. Running slidev build compiles the Markdown, Vue components, and all associated assets into a self-contained web application. This output can then be deployed to any static hosting provider, from GitHub Pages to Netlify or Vercel, like any other modern single-page application. For offline or PDF export needs, Slidev uses tools like Playwright (via playwright-chromium) to render the web application headless and generate high-quality PDFs or images. This approach ensures consistent output regardless of the target environment.

    Here is an example of a typical Slidev project file structure, showing how content, configuration, and custom components are organized:

    my-presentation/
├── public/
│   └── favicon.svg
├── components/
│   └── MyCustomChart.vue  # Reusable Vue components for slides
├── layouts/
│   └── my-hero-layout.vue # Custom Vue layouts
├── styles/
│   └── custom.css         # Global CSS overrides
├── slides.md              # Main presentation content (Markdown)
├── slidev.config.ts       # Project configuration, themes, fonts
├── package.json           # Project dependencies
└── pnpm-lock.yaml

    This structure is verifiable from the project's source code and documentation. Implementation details for specific features might evolve with Slidev versions, but this core architectural overview remains consistent.

    Building or Extending It: A Practical Guide

    Getting Slidev running locally or customizing it for your team's needs is a straightforward process, integrated with common developer workflows.

    To start with a local development environment for the Slidev project itself (rather than just creating a presentation with it), you typically follow these steps:

    1. Clone the repository:
    git clone https://github.com/slidevjs/slidev.git
cd slidev
    1. Install dependencies: Slidev uses pnpm for package management, which is recommended for monorepos due to its efficient dependency linking.
    pnpm install
    1. Run the core development server:
    pnpm dev

This command starts the development server for the core Slidev CLI, allowing you to test changes to the underlying platform. If you want to run a specific example presentation or test against a newly created presentation, you would typically run pnpm dev inside that presentation's directory, assuming you have installed Slidev locally.

Extending Slidev for your own presentations often involves customizing layouts, themes, or adding custom components. Here is an annotated code snippet for configuring a presentation to use a custom layout and global styles:


// slidev.config.ts

import { defineSlidevConfig } from '@slidev/cli'


export default defineSlidevConfig({

  // Use the default theme but allow overrides

  theme: 'default',


  // Enable the built-in 'monaco' code editor for live coding demos

  // https://sli.dev/guide/syntax.html#monaco-editor

  monaco: true,


  // Custom fonts for branding

  fonts: {

    // Defines a custom font family 'MyBrandSans' using local files or Google Fonts

    sans: 'MyBrandSans, Inter, Helvetica Neue, Arial, sans-serif',

  },


  // Custom global styles. These will be injected into every slide.

  // Useful for branding colors, component resets, etc.

  css: [

    './styles/custom-vars.css', // Defines CSS variables like --s-color-primary

    './styles/global.css',      // General styling overrides

  ],


  // Custom layouts can be placed in the `layouts/` directory

  // and referenced in Markdown using `layout: my-custom-layout` frontmatter.

  // Example: `layouts/my-custom-layout.vue`

})

In this slidev.config.ts, we configure fonts, enable the Monaco editor for interactive code blocks, and link custom CSS files (custom-vars.css, global.css) that might define brand colors or specific styling rules. The layouts/ directory is where you place .vue files for custom slide structures, allowing you to define reusable component-based templates beyond the defaults.

A common issue developers encounter when customizing Slidev relates to CSS specificity and theme overrides. Because Slidev uses a component-based approach with scoped CSS in its default theme, directly overriding styles can sometimes be tricky. If you are trying to change a specific element's style, you might need to use more specific selectors in your custom.css file or understand how the theme's CSS variables are used. For example, rather than overriding a component's hardcoded color, it is often more effective to define or override a CSS variable like --s-color-primary in styles/custom-vars.css because themes are designed to react to these variables. Always inspect the generated HTML and CSS in your browser's developer tools to understand the hierarchy and specificity if a style is not applying as expected.

Contributing to the Project: The Open-Source PR Process

Contributing to Slidev, like any mature open-source project, involves a structured process that ensures quality, consistency, and collaborative development. Understanding when and how to contribute effectively is important.

Step 0: When to Open an Issue vs. When to Go Straight to a PR

  • Open an Issue BEFORE a PR: For structural changes, new features, architectural shifts, or when you are unsure about the best implementation path, always open an issue first. This allows for discussion, gathers feedback from maintainers and the community, and prevents wasted effort on a solution that might not align with the project's roadmap. This is for anything that adds new functionality or significantly alters existing behavior.

  • Go Straight to a PR: For minor improvements, bug fixes with clear solutions, typos in documentation, or small style adjustments, you can often proceed directly with a pull request. These are self-contained changes that usually require minimal discussion.

Step 1: Fork, Clone, Install

Begin by creating your own fork of the slidevjs/slidev repository on GitHub. Then, clone your fork locally and install its dependencies:

git clone https://github.com/YOUR_GITHUB_USERNAME/slidev.git
cd slidev
pnpm install

This sets up your local development environment with all the necessary packages.

Step 2: Locate the Correct File and Follow Conventions

Navigate to the relevant files within the monorepo structure. For example:

  • If fixing a bug in the core CLI, you might look in packages/slidev/src.
  • If enhancing a default theme component, you would find it in packages/theme-default/layouts or packages/theme-default/components.
  • Documentation fixes are in the docs directory.

Adhere to the project's established conventions:

  • Code Style: Slidev uses ESLint and Prettier. Ensure your code conforms by running pnpm lint and pnpm format before committing.
  • TypeScript: All new code should be written in TypeScript, using its type safety.
  • Vue Component Style: Follow Vue 3's recommended practices, including `` where appropriate.
  • Commit Messages: Maintainers appreciate conventional commit messages (e.g., feat: add new feature, fix: resolve bug in X, docs: update Y).

Step 3: Quality Bar for Contributions

Maintainers typically look for:

  • Clear Purpose: Does the PR solve a defined problem or add a valuable feature? Referencing an issue helps.
  • Correctness: Does it work as intended? Does it introduce regressions?
  • Tests: For new features or bug fixes, include unit or integration tests if applicable. While not every small change requires tests, critical logic additions do.
  • Documentation: If adding new features or changing APIs, update the docs/ accordingly.
  • Code Quality: Clean, readable, idiomatic code that adheres to the project's style. Avoid over-engineering simple solutions.

Contributions that are rushed, poorly tested, or deviate significantly from the project's style without justification are more likely to be rejected or require extensive rework.

Step 4: Open a PR - Title, Description, and Post-Merge

Once your changes are committed to a new branch in your fork, push it to GitHub and open a pull request against the slidevjs/slidev main branch.

  • Title Convention: Use a clear, concise title that summarizes the change, often following conventional commit guidelines (e.g., fix: incorrect type for theme-config).
  • Description Checklist: Provide a detailed description including:
    • A summary of the changes.
    • Why this change is necessary or beneficial.
    • How you tested it (if applicable).
    • Screenshots or animated GIFs for visual changes.
    • Reference any linked issues (e.g., Closes #123).
    • Confirm you have run pnpm lint and pnpm format.

After opening, expect maintainers to review your code, potentially ask for clarifications, or suggest improvements. Be responsive to feedback. Once approved and all checks pass, your contribution will be merged, becoming a part of Slidev, and you will be credited as a contributor. It is a rewarding process that strengthens the open-source community.

Wrapping Up

Slidev changes how developers approach presentations, merging the familiarity of markdown and modern web development practices into a flexible tool.

Here are three takeaways for any developer considering Slidev:

  1. Embrace the Developer Workflow: Slidev integrates with your existing development tools. You write content in Markdown, style with CSS, add interactivity with Vue components, and version control everything with Git. This means no more clunky GUI tools; your presentations live and evolve alongside your code.
  2. Unlock Web Platform Power: By using Vue and Vite, Slidev allows you to embed live code, interactive charts, and external web applications directly into your slides. This goes beyond static images, enabling dynamic, engaging presentations without complex workarounds.
  3. Customize with Confidence: While providing defaults, Slidev is designed for deep customization. You have the freedom to craft bespoke layouts, themes, and plugins using standard web technologies. This enables you to create presentations that are not just functional, but also align with your brand and technical requirements.

Slidev offers an alternative for technical presentations, enabling developers to create high-quality, engaging content with efficiency and precision. Explore Slidev further and discover its potential for your next technical talk or team update.

Dive into the source code, review its features, and join the community by visiting Slidev on Fossy: https://fossy.dev/slidevjs/slidev.