No Discarded Rejection

Suggestion

small-rules/no-discarded-rejection

Warn when a Promise rejection handler explicitly discards the failure and resolves to undefined.

Rationale

An empty catch turns a Promise that didn’t work into a Promise whose value is undefined. The miss is hidden. You do not log it, and you do not give a fallback.

The rule warns on the empty forms. It does not add a throw. It only follows a Promise it can see from the syntax and the scope. To hide one on purpose, use an oxlint-disable comment and say why.

Diagnostic Messages

noDiscardedRejection

This rejection handler discards the failure without recording it or recovering from it.

Configuration

This rule does not accept options.

.oxlintrc.json

{
  "jsPlugins": [
    "@pobammer-ts/small-rules"
  ],
  "rules": {
    "small-rules/no-discarded-rejection": "warn"
  }
}

oxlint.config.ts

import { defineConfig } from "oxlint";

export default defineConfig({
  jsPlugins: ["@pobammer-ts/small-rules"],
  rules: {
    "small-rules/no-discarded-rejection": "warn",
  },
});

Examples

discarded Promise rejection

Promise.resolve(request()).catch(() => undefined);

recorded Promise rejection

Promise.resolve(request()).catch((exception) => { logFailure(exception); });