Codeforces JavaScript Local Runner

Run JavaScript solutions locally inside VS Code with Codeforces-style readline() and print() behavior.

Features

• Sidebar view with multiple test cases
• Per-test Run and global Run All
• Input / Expected Output / Output fields
• Pass/Fail comparison against expected output
• Works on currently active JS editor file

How it works

The extension executes your active editor code in a sandbox and provides:

• readline() → reads one line from testcase input
• print(...) → appends to output (space-joined, newline-terminated)
• console.log/error(...) → also captured in output

Usage

1. Open a JavaScript file with your solution.
2. Open CF Local Runner from the Activity Bar / Side Bar.
3. Add testcases, set input and expected output.
4. Click Run on a testcase or Run All.

Requirements

• VS Code 1.85+
• Node.js 18+ recommended

Extension Settings

• cfLocal.timeoutMs: execution timeout in milliseconds (default: 2000)
• cfLocal.maxOutputChars: max captured output chars (default: 200000)

Known limitations

• This is local execution only (not Codeforces remote judge).
• Infinite loops are stopped by timeout.