Personal Landing Page | Anton Veretennikov

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OSHA 30 Preparation HelperDeployed at

osha30.antonv.dev

Interactive study tool for OSHA 30 certification preparation with a focus on active learning. Features a quiz-based approach that challenges users to select correct answers rather than passively reading them. Includes nearly 1,500 searchable questions with keyword and full-text search powered by flexsearch. Supports alternative answer phrasings and offers randomized quick-test mode for efficient review sessions.

PixiJS

Parcheesi: The Board Game

github.com/king8fisher/parcheesi

Deployed at

parcheesi.antonv.dev

Local multiplayer board game designed for shared-screen play on a single device. UI elements are oriented toward each player's edge, enabling face-to-face gameplay. Built with PixiJS for smooth 2D rendering and animations.

QR Code Compression Worker

github.com/king8fisher/qrcodeworker

Cloudflare Worker that generates QR codes with an optimized API for resource-constrained IoT devices. Packs 3×3 module grids into 9-bit integers, reducing CPU and memory overhead on low-end hardware:

1 +-----+-----+-----+-----+        +-----+-----+-----+-----+
2 |0 0 0|1 1 0|1 0 1|0 0 1|        |     |     |     |     |
3 |1 1 0|1 0 1|1 0 1|0 1 1|        |  24 | 235 | 365 | 308 |
4 |0 0 0|1 1 0|1 0 1|0 0 1|        |     |     |     |     |
5 +-----+-----+-----+-----+   ->   +-----+-----+-----+-----+
6 |0 0 0|1 0 0|1 1 1|0 0 1|        |     |     |     |     |
7 |0 0 0|1 0 1|1 1 1|0 0 1|        |  0  | 233 | 511 | 292 |
8 |0 0 0|1 1 0|1 1 1|0 0 1|        |     |     |     |     |
9 +-----+-----+-----+-----+        +-----+-----+-----+-----+

Bits being layed out this way:

1 +------------+
2 |1   2   4   |   1<<0  1<<1   1<<2
3 |8   16  32  |   1<<3  1<<4   1<<5
4 |64  128 256 |   1<<6  1<<7   1<<8
5 +------------+

npm

Termi-link

github.com/king8fisher/termi-link

Published to

npmjs.com/package/termi-link

Drop-in replacement for the popular terminal-link package, providing clickable hyperlinks in supported terminals.

Why Termi-link?

The original terminal-link inserts invisible Zero Width Space characters (U+200B) around links in unsupported terminals, causing broken URLs and 404 errors on Windows. Termi-link eliminates this issue while maintaining full API compatibility.

npmeslint

eslint-plugin-no-in-array

github.com/king8fisher/eslint-plugin-no-in-array

Published to

npmjs.com/package/eslint-plugin-no-in-array

Type-aware ESLint rule that detects misuse of the in operator with arrays in TypeScript.

The in operator checks for property keys, not values — causing subtle bugs:

typescript
1"a" in ["a", "b", "c"]; // false! indices are "0", "1", "2"

Use .includes() instead. This plugin catches arrays, tuples, readonly arrays, and inline literals.

npm

Precise Colors

github.com/king8fisher/precise-colors

Published to

npmjs.com/package/precise-colors

High-precision color space conversions for TypeScript/JavaScript. Supports 12 color models: RGB, HSL, HSV, HWB, HCG, CMYK, Lab (D65/D50), LCH, XYZ, Apple 16-bit RGB, and Grayscale.

Key highlights:

Precision-first: Chain multiple conversions with rounding only at the final step
Type-safe Lab: Branded types prevent mixing D65/D50 illuminants at compile time
CIE 15.3 compliant: Uses exact rational constants from the standard
Tested thoroughly: Round-trip across all 16.7M RGB colors with Lab error < 0.001

ts
1import { rgb2lab, lab2lch, lch2css } from "precise-colors";
2
3const lab = rgb2lab({ r: 100, g: 150, b: 255 });
4const lch = lab2lch(lab);
5console.log(lch2css(lch)); // "lch(62.55% 62.44 279.76)"

Dictionary Explorer

WordNet XML dictionary parser with comprehensive Zod schema validation. Extracts and prepares lexical data for web application consumption.

github.com/king8fisher/dictexplorer

Zod Test Coverage

1📂 LexicalResource                  [-] (basic test for a parent)
2   📂 Lexicon                       [-] (basic test for a parent)
3      📂 LexicalEntry               [x]
4         📄 Form                    [x]
5         📂 Lemma                   [x]
6            📄 Pronunciation        [x]
7         📂 Sense                   [x]
8            📄 SenseRelation        [x]
9      📂 Synset                     [x]
10         📄 Definition              [x]
11         📄 Example                 [x]
12         📄 ILIDefinition           [x]
13         📄 SynsetRelation          [x]
14      📄 SyntacticBehaviour         [x]