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Running TypeScript in Zerethon IDE

How Run type-checks, compiles and runs your project, the time limit, input and tests.

Runs in Zerethon IDE · TypeScript 7 Official TypeScript documentation ↗
  • Run (Ctrl/⌘+Enter) type-checks and compiles every .ts file with TypeScript 7 in strict mode, then runs the entry — main.ts by default — with Node.js 22. Make another file the entry with the ▶ button next to it in the explorer.
  • A type error stops the run with “Compilation failed · nothing was run” and the compiler's messages, each with a file, line and error code (TS2322, …).
  • Errors are also underlined while you type, when the TypeScript language server is available.
  • A run is stopped after 15 seconds (compiling included). There is no network and project files are read-only (write to /tmp).
  • Run tests (Ctrl/⌘+Shift+Enter) compiles once, then runs each test_*.ts file. A file passes when it exits with code 0.
test_geometry.ts 
import * as assert from 'assert';
import { area } from './geometry';

assert.strictEqual(area({ width: 2, height: 3 }), 6);
console.log('geometry ok');
A test file for geometry.ts from “Modules and several files”.

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