TypeCrt – Zero-latency typing test in vanilla TS, no frameworks

Name: TypeCrt – Zero-latency typing test in vanilla TS, no frameworks
Availability: InStock
Author: shadowline

by shadowline·Mar 5, 2026·2 points·1 comment

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AI Analysis

●●SolidSlickEye CandySolve My Problem

Vanilla TS beats React's input lag—but Monkeytype already solved this problem.

Strengths

•Zero input latency at 200+ WPM through direct DOM manipulation, not React abstraction
•Markov chain-based KeyForge adapts practice to weakest keystroke patterns
•Command palette, mechanical sounds, and 50+ themes create cohesive polished experience

Weaknesses

•Typing test category crowded: Monkeytype, Keybr, 10FastFingers, TypeRacer already established
•Performance improvement alone doesn't justify switching if users invested in existing accounts

Post Description

Hey HN, I built TypeCrt because every typing test I tried had noticeable input lag at 150+ WPM. Monkeytype uses React. Keybr uses React. 10FastFingers feels like 2012. So I built one from scratch with vanilla TypeScript, vanilla CSS, and direct DOM manipulation — no React, no Vue, no Angular.

The result: zero perceptible input latency, even at 200+ WPM.

Some things I'm proud of:

- CRT terminal aesthetic with 50+ themes and a visual theme creator - Adaptive practice mode ("KeyForge") that uses Markov chains to generate words targeting your weakest keys - Per-word burst speed breakdown, keystroke heatmaps, consistency tracking - Command palette (Ctrl+Shift+P), mechanical keyboard sounds, pace caret ghost - Cloud sync via Firebase, tiered analytics dashboard

Tech stack: TypeScript (strict) + Vanilla CSS + Vite. ~15K lines. No dependencies beyond Chart.js and Firebase.

I'd genuinely love feedback from this community — especially on performance, UX, and what features would make you switch from your current typing tool.