No Object Parameters

Error

small-rules/no-object-parameters

Disallow object function parameters; inputs must use an owner-provided type and be parsed at their boundary.

Rationale

Ported from dmmulroy/anti-slop. object excludes null and the scalar types, and says nothing useful about the value’s contract. Accept the owner type you need, and parse external input before you call this function.

Diagnostic Messages

objectParameter

Parameter `{{parameter}}` uses the broad `object` type. Accept a named owner type; parse external input at its boundary before calling this function.

Configuration

This rule does not accept options.

.oxlintrc.json

{
  "jsPlugins": [
    "@pobammer-ts/small-rules"
  ],
  "rules": {
    "small-rules/no-object-parameters": "error"
  }
}

oxlint.config.ts

import { defineConfig } from "oxlint";

export default defineConfig({
  jsPlugins: ["@pobammer-ts/small-rules"],
  rules: {
    "small-rules/no-object-parameters": "error",
  },
});

Examples

broad object parameter

function save(value: object) {}

named owner contract

interface Owner { readonly id: string }
function save(value: Owner) {}

Related Rules

RelatedNo Unknown Parametersno-object-parameters complements no-unknown-parameters: together they ban object and unknown parameters, requiring named types parsed at boundaries.