Where Are the Source Code Files Located in the Hallmark Repository?

TLDR: The Hallmark repository stores all functional source code under the site/ directory, with the main entry point at site/index.html and core logic in site/js/main.js, while content data resides in skills/hallmark/.

The Hallmark project by Nutlope is a pure client-side web demo that runs entirely in the browser. Understanding where the source code files are located in the Hallmark repository is essential for developers looking to customize themes, extend functionality, or integrate the component library into their own projects. All executable code lives under the site/ directory, while the repository root contains build configuration and the skills/ folder houses the Markdown content that drives the demo.

Hallmark Repository Source Code in the site/ Directory

The site/ directory at the repository root contains every file required to render the Hallmark demo and power its interactive features. This is a static site structure with no server-side components.

HTML Entry Point and Core JavaScript

The primary access point is site/index.html, which bootstraps the application and loads the core JavaScript engine.

The central logic resides in site/js/main.js. This file implements the theme registry, clipboard utilities, and UI helpers through several critical functions and data structures:

• applyTheme(themeName): Switches visual themes by updating document.documentElement.dataset.theme and reading from the THEMES map.
• copyFromSource(element): Extracts text from a DOM element and writes it to the clipboard.
• attachCopyButtons(): Initializes the copy-to-clipboard functionality across the interface.
• pickRandomTheme(): Returns a random theme name from the available options.
• Data objects: THEMES, ARCHETYPES, and COPY define available visual styles, component templates, and per-theme text content.

Example Pages and Visual Test Fixtures

The site/examples/ directory contains standalone demonstrations of specific themes such as Wayfare, Tally, and Riso. Each subdirectory includes its own HTML, CSS, and occasionally a small application script—such as site/examples/tally/app.js—that imports the core Hallmark styles.

Visual regression tests and documentation generation fixtures live in site/_tests/. These files validate that theme rendering remains consistent across changes.

Stylesheet Assets

CSS files defining the visual language for each theme are distributed throughout the site/ structure:

• Root level: site/*.css for base styles.
• Example level: site/examples/*/*.css for theme-specific overrides.

Content Data and Configuration Files

Not all source files are executable code. The repository separates logic from content:

Markdown References in skills/hallmark/

The skills/hallmark/references/ directory contains Markdown files that drive the text content shown in the demo. For example, skills/hallmark/references/microinteractions.md provides copy data that feeds the COPY object in main.js, but these files are not themselves executable.

Build Configuration

package.json sits at the repository root and contains project metadata, dependency definitions, and scripts for building or serving the static site, typically using Vite or a simple static server command.

Practical Code Examples from main.js

The following snippets demonstrate how to interact with the functions defined in site/js/main.js.

Switch to a specific theme programmatically:

// Applies the 'midnight' theme by updating the DOM and localStorage
applyTheme('midnight');

Copy text from a source element:

// Select an element with the data-copy-source attribute and copy its text
const source = document.querySelector('[data-copy-source]');
copyFromSource(source);

Listen for built-in keyboard shortcuts:

document.addEventListener('keydown', (e) => {
  if (e.key === 't' || e.key === 'T') {
    // Cycle to next theme in THEMES object
    const order = Object.keys(THEMES);
    const current = document.documentElement.dataset.theme;
    const next = order[(order.indexOf(current) + 1) % order.length];
    applyTheme(next);
  } else if (e.key === 'r' || e.key === 'R') {
    // Apply random theme using pickRandomTheme()
    applyTheme(pickRandomTheme());
  }
});

Summary

• All executable source code resides in the site/ directory, including HTML, JavaScript, CSS, and test fixtures.
• site/js/main.js contains the core application logic for theming, clipboard operations, and UI interactions.
• Example implementations are located in site/examples/, each demonstrating specific theme configurations.
• Content data lives in skills/hallmark/ as Markdown references that populate the application's text content.
• The repository contains no server-side code; it is a purely client-side static site.

Frequently Asked Questions

Does the Hallmark repository contain any backend server code?

No. According to the Nutlope/hallmark source code, the repository is a pure client-side web demo. All functionality executes in the browser using JavaScript files located in site/js/, with no API endpoints, server routes, or backend logic present.

Where are the theme definitions stored?

Theme definitions reside in the THEMES object located in site/js/main.js. This JavaScript object maps theme names to their configuration, while associated CSS files for each theme are stored in site/examples/[theme-name]/ directories or the root site/ folder.

How do I add a new example page to the repository?

Create a new subdirectory under site/examples/ containing an index.html file, a CSS file for your theme-specific styles, and optionally a JavaScript file (like app.js) that imports the core Hallmark logic from site/js/main.js. Reference existing examples like site/examples/wayfare/ for the standard structure.

What is the purpose of the skills/hallmark/ directory?

The skills/hallmark/ directory contains Markdown reference files that serve as the content source for the demo. Files like microinteractions.md provide the copy and structural data that populate the COPY object in main.js, driving the text content displayed across different themes.

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}