eslint-plugin-decimal-system

ESLint plugin that enforces usage of decimal numeric literals only.

Disallows:

• Hexadecimal (0xFF)
• Binary (0b1010)
• Octal (0o755)
• BigInt in non-decimal form (0xFFn)

Allows:

• Decimal numbers (10, 12345, 0, 42n)

Installation

npm install --save-dev eslint-plugin-decimal-system

Peer dependency:

npm install --save-dev eslint

What the plugin exports

• default → plugin (contains rules and configs)

• named export → rules

Usage

ESLint 9

import { defineConfig } from "eslint/config";
import decimal from "eslint-plugin-decimal-system";

export default defineConfig([
  ...decimal.configs.recommended,
])

Or enable manually:

import decimal from "eslint-plugin-decimal-system";

export default [
  {
    plugins: { decimal },
    rules: {
      "decimal/decimal-system-only": "error",
    },
  },
];

Rule Details

• The rule checks all Literal AST nodes and reports when:

• The literal is number or bigint

• The raw source starts with 0x, 0b, or 0o

When to Use

• This rule is useful when:

• Enforcing numeric consistency in codebases

• Avoiding mixed numeral systems

• Improving readability

• Preventing accidental octal usage

License

ISC