errctx

Go-style error context tracking for Node.js.

Install

npm i errctx

Usage

import { errgroup, errorContext } from "errctx";
import { background } from "go-like-ctx";

const ctx = background();
const ectx = errorContext(ctx);

const g = errgroup(ectx.ctx, {
  onError: (err) => ectx.fail(err),
});

g.go(async (groupCtx) => {
  void groupCtx;
  // do work
});

await g.wait();

if (ectx.isFailed()) {
  console.error("reason:", ectx.error());
}

API

errorContext(ctx)

Returns an object with:

• ctx: the input context
• fail(err): record only the first error
• error(): returns the recorded error or null
• isFailed(): true only if fail() was called

errgroup(ctx, opts)

Re-exported from the errgroup package.

Examples

• examples/signup.js
• examples/signup.no-lib.js