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Promise Combinator Simulator

Deterministic event simulation for0–100 described tasks, with ties in input order.

promise-combinator-simulatorLOCAL WORKSPACE

Enabling local controls…

Promise chooser

Recommended: Promise.all

// Pass existing promises/values; this does not start or cancel their underlying work.
function combine(tasks) {
  return Promise.all(tasks);
}
Local processing inputs

Local Worker: 10s startup, 1s processing. 32KiB per field, 1MiB complete result. Editing or clearing cancels work and stale output. Generated HTML/CSS is not mounted; remote image preview requires a separate action.

Preview and code

Edit fields and build a preview; complete code can be copied or downloaded.

Model and scope

Deterministic event simulation for0–100 described tasks, with ties in input order. Values stay literal strings; all/allSettled preserve input order and any errors preserve input order. Empty race stays pending; empty any rejects. Chooser recommendations use explicit all/first and rejection goals. Copyable snippets never execute here. Play/Pause/Reset advance only a display clock, respecting reduced motion; no task timers, requests or actual Promises execute. Real event-loop scheduling/clamping is outside this model. No URL/storage persistence.

ECMAScript Promise combinators ↗ToolHub source controls ↗

How to use this tool

Edit the bounded fields, process locally, inspect the native preview, then copy or download complete code. Editing clears stale output.

When not to use it

Deterministic event simulation for0–100 described tasks, with ties in input order. Values stay literal strings; all/allSettled preserve input order and any errors preserve input order. Empty race stays pending; empty any rejects. Chooser recommendations use explicit all/first and rejection goals. Copyable snippets never execute here. Play/Pause/Reset advance only a display clock, respecting reduced motion; no task timers, requests or actual Promises execute. Real event-loop scheduling/clamping is outside this model. No URL/storage persistence.