eslint-plugin-freeze-global

Object.freeze globals to prevent accidental mutation during the life of your program.

Installation

You'll first need to install ESLint:

npm i eslint --save-dev

Next, install eslint-plugin-freeze-global:

npm install eslint-plugin-freeze-global --save-dev

Usage

Add eslint-plugin-freeze-global to the plugins section of your .eslintrc configuration file:

{
    "plugins": [
        "eslint-plugin-freeze-global"
    ]
}

Then configure the rules you want to use under the rules section.

No Mutable Global

{
    "rules": {
        "eslint-plugin-freeze-global/no-mutable-global": 2
    }
}

Examples

❌ Invalid

import zod from 'zod';
const GLOBAL = {
    a: 1,
    b: 2,
    c: {
        d: 'e'
    }
};

✅ Valid with ["error", "no-mutable-global"]

import zod from 'zod';
const GLOBAL = Object.freeze({
    a: 1,
    b: 2,
    c: Object.freeze({
        d: 'e',
    })
});

No Naked Global

{
    "rules": {
        "eslint-plugin-freeze-global/no-naked-global": 2
    }
}

Examples

❌ Invalid

import zod from 'zod';
const GLOBAL = {};

✅ Valid with ["error", "no-naked-global"]

import zod from 'zod';
const GLOBAL = Object.freeze({});

Or refactor into a class or applicable location.