No Unused Use Memo

Error

small-rules/no-unused-use-memo

Disallow standalone useMemo calls that ignore the memoized value.

Diagnostic Messages

unusedUseMemo

useMemo results must be used. Standalone useMemo calls add overhead without preserving a value.

Configuration

This rule accepts one options object after the severity.

environmentOptional

The React environment: 'roblox-ts' uses @rbxts/react, 'standard' uses react.

Type

"roblox-ts" | "standard"

Default

roblox-ts

{
  "jsPlugins": [
    "@pobammer-ts/small-rules"
  ],
  "rules": {
    "small-rules/no-unused-use-memo": [
      "error",
      {
        "environment": "roblox-ts"
      }
    ]
  }
}

Examples

Unused memoized value

import { useMemo } from "react";

useMemo(() => 1, []);

Consumed memoized value

import { useMemo } from "react";

const value = useMemo(() => 1, []);

Related Rules

No Use Memo Simple ExpressionRelatedStandalone unused memos, trivial memos, and fully-static memos are one wasteful-useMemo family.No Useless Use MemoRelatedUnused memos and static-value memos both pay hook cost for no preserved value.