Strip debug code

ttsc is the standalone TypeScript-Go compiler — see Setup if you haven’t installed it yet.

@ttsc/strip removes configured function calls and debugger statements from the emit. It’s not a minifier or tree-shaker — it removes exactly the patterns you list, nothing else.

Install


npm install -D @ttsc/strip


// tsconfig.json
{
  "compilerOptions": {
    "plugins": [{ "transform": "@ttsc/strip" }]
  }
}

With no extra configuration, the defaults are:

console.log
console.debug
assert.*
debugger

So console.log(...) and debugger; disappear from your emit by default.

Custom patterns


{
  "compilerOptions": {
    "plugins": [
      {
        "transform": "@ttsc/strip",
        "calls": ["logger.debug", "metrics.devOnly", "assert.*"],
        "statements": ["debugger"]
      }
    ]
  }
}

calls — statement-level calls. Supports a .\* wildcard at the end (e.g. assert.* matches assert.equal, assert.deepStrictEqual, …).
statements — bare statements. Currently supports debugger.

What “statement-level” means

The plugin only strips calls that are the entire statement:


console.log("debug");        // ← removed
const result = compute();
console.log(result);         // ← removed
 
const data = console.log("x"); // ← NOT removed (the call is an expression)

This is intentional — silently changing expressions can break code that depends on the call’s return value, however unusual that is.

Use cases

Production builds — strip console.log and debugger, keep console.warn and console.error.
Test code in published artifacts — strip assert.* from the package emit if your library uses node:assert internally.
Feature-flag tooling — wrap dev-only code in metrics.devOnly(...) calls that get stripped in prod.

When not to use this

If you want a real minifier (dead-code elimination, mangling, …), use Terser or esbuild via @ttsc/unplugin. @ttsc/strip is the targeted “remove these specific patterns” pass.