eslint-plugin-set-iterable

How to use

Install the package from NPM:

	npm install eslint-plugin-set-iterable

Add the rule to your eslint config:

{
	"env": {
		"es6": true
	},
	"root": true,
	"parser": "@typescript-eslint/parser",
	"parserOptions": { 
		"ecmaVersion": 2020,
		"tsconfigRootDir": ".",
		"project": ["./tsconfig.json"]
	},
	"plugins": [ "@typescript-eslint", "set-iterable" ],
	"rules": {
		"set-iterable/no-set-spread": "error",
		"set-iterable/no-for-of-set": "error"
	}
}

Rule details

Adds two eslint rules for linting TypeScript files:

no-set-spread matches code that uses the spread (...) operator with a Set<T>.

Examples of incorrect code for this rule:

const a = [...new Set()];

const s1 = new Set<string>();
[...s1];

no-for-of-set matches Set being iterated over in for...of.

Examples of incorrect code for this rule:

for (const e of new Set())
	// ...

const s1 = new Set<string>();
for (const e of s1)
	// ...

Internet Explorer doesn't support iterable sets (Set.prototype[Symbol.iterator]), so this plugin is meant to find those cases.

For info on setting up eslint rules: https://eslint.org/docs/developer-guide/working-with-rules