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JavaScript API

Public JS surface area for zer0-mistakes. Everything below is intended for consumers; anything not listed here may change without notice.

Related docs: Theming · Layouts and navigation · Code blocks · Customization

Module structure

assets/js/
├── modules/
│   ├── navigation/
│   │   ├── index.js          ← entry point (loaded as <script type="module">)
│   │   ├── config.js          ← selectors, breakpoints, shortcuts
│   │   ├── navbar.js          ← dropdowns, mobile menu, tooltips
│   │   ├── scroll-spy.js      ← active TOC link tracking
│   │   ├── smooth-scroll.js   ← anchor scrolling with header offset
│   │   ├── keyboard.js        ← /, [, ], b, t, ? shortcuts
│   │   ├── gestures.js        ← edge-swipe sidebar toggle
│   │   ├── focus.js           ← offcanvas focus management
│   │   └── sidebar-state.js   ← localStorage for expanded nodes
│   └── theme/
│       └── appearance.js      ← runtime Appearance panel (opt-in)
├── ui-helpers.js              ← showToast, copyToClipboard, [data-copy]
├── background-customizer.js   ← window.zer0Bg
├── theme-customizer.js        ← admin theme page (skin grid, YAML export)
├── theme-preview.js           ← admin preview page (live skin/mode labels)
├── code-copy.js               ← line numbers, language header, copy button
├── search-modal.js            ← search dialog
├── halfmoon.js                ← navbar color-mode toggle
└── navigation.js              ← DEPRECATED shim (logs warning)

Global namespaces

window.zer0Navigation — navigation orchestrator

Exposed by assets/js/modules/navigation/index.js. Instantiated on DOMContentLoaded.

window.zer0Navigation.getModule(name);
// 'scrollSpy' | 'smoothScroll' | 'keyboard' | 'gestures' | 'focus' | 'state' | 'navbar'

window.zer0Navigation.getConfig();
window.zer0Navigation.scrollTo('#section-id');

Events:

Event Detail When
navigation:ready { modules: string[] } All navigation modules initialized

Example:

document.addEventListener('navigation:ready', (e) => {
  const kb = window.zer0Navigation.getModule('keyboard');
  console.log('Shortcuts active:', e.detail.modules.includes('keyboard'));
});

See layouts-and-navigation.md for sidebar, TOC, and FAB behavior.

window.zer0UI — UI helpers

Exposed by assets/js/ui-helpers.js.

window.zer0UI.showToast('Saved', { variant: 'success', duration: 3000 });
window.zer0UI.copyToClipboard('text to copy');  // Promise

Variants: 'info' | 'success' | 'warning' | 'danger'.

Declarative copy:

<button type="button" data-copy="https://example.com/path">Copy link</button>

Used by code blocks for non-pre copy targets.

window.zer0Bg — background customizer

Exposed by assets/js/background-customizer.js. See theming.md.

window.zer0Bg.setSkin('aqua');
window.zer0Bg.toggle();
window.zer0Bg.toggle(false);              // force off
window.zer0Bg.setOpacity('texture', 0.1);
window.zer0Bg.currentSkin();

Events:

Event Detail When
zer0:skin-change { skin: string } After setSkin()
zer0:bg-toggle { enabled: boolean } After toggle()

Storage keys:

Key Value
zer0-theme-skin Active skin name
zer0-bg-enabled "true" / "false"

Appearance panel — localStorage

When appearance_panel: true:

Key Value
theme "light" | "dark" | "auto"
zer0-appearance JSON, e.g. { "primary": "#0ea5e9" }

Initial paint: script in _includes/core/tokens-inline.html.

Extend the panel — see extending.md § Add an Appearance panel control.

Admin theme scripts

theme-customizer.js (page: /about/settings/theme/):

  • Listens for skin card clicks → zer0Bg.setSkin()
  • Rebuilds YAML export on color picker input
  • Dispatches/listens to zer0:skin-change

theme-preview.js (page: /about/settings/theme-preview/):

  • Updates live labels for active skin and color mode

These are page-scoped; they do not expose a global namespace.

assets/js/modules/navigation/config.js:

import { config, isBelowBreakpoint, syncBreakpointsFromCss } from './config.js';

config.selectors.toc;                    // '#TableOfContents'
config.scrollSpy.rootMargin;             // '-80px 0px -80px 0px'
config.keyboard.keys.search;             // '/'
config.breakpoints.lg;                   // 992

isBelowBreakpoint('lg');                 // boolean
syncBreakpointsFromCss();                // read --zer0-bp-* from :root

Disable shortcuts:

// Fork config.js
keyboard: { enabled: false, keys: { … } }

Writing a navigation module

// assets/js/modules/navigation/my-module.js
import { config } from './config.js';

export class MyModule {
  constructor() { this._handlers = []; }
  init() {
    const el = document.querySelector(config.selectors.mainContent);
    if (!el) return;
    const handler = () => { /* … */ };
    el.addEventListener('scroll', handler);
    this._handlers.push({ target: el, type: 'scroll', handler });
  }
  destroy() {
    this._handlers.forEach(({ target, type, handler }) =>
      target.removeEventListener(type, handler));
    this._handlers = [];
  }
}

Register in assets/js/modules/navigation/index.js.

Head scripts (non-module)

Loaded with defer from _includes/core/head.html:

Script Purpose
auto-hide-nav.js Hide navbar on scroll down
back-to-top.js #backToTopBtn visibility
halfmoon.js Color mode dropdown
code-copy.js Code block enhancements
side-bar-folders.js Folder disclosure in sidebar

Migration from legacy globals

Was Now
assets/js/navigation.js IIFE ES module orchestrator
alert("Link copied…") window.zer0UI.showToast(…)
Inline onclick clipboard data-copy attribute
assets/js/color-modes.js Removed; use halfmoon.js + Appearance panel

assets/js/navigation.js remains a no-op shim with a deprecation warning.

Backward compatibility

  • halfmoon.js and Appearance panel share localStorage["theme"].
  • Legacy _data/navigation/*.yml schema unchanged; nav_list.html delegates to nav-tree.html.

Further reading