---
title: "unicorn/no-unreadable-iife"
description: "Disallow calling an arrow function in place when its body is in parentheses"
# Generated by src/codegen/lint-rule-docs.ts. Do not edit below this line.
plugin: "unicorn"
aliases: []
kind: "suggestion"
category: "pedantic"
default: "off"
fixable: "suggestion"
typeAware: false
deprecated: false
---

`(() => (value))()` ends in a pile of parentheses. It's hard to see which pair closes the body, which closes the function and which calls it. A block body with `return` reads better. Often you don't need the function at all.

`--fix-suggestions` turns the body into `{ return ...; }`.

{/* Generated by src/codegen/lint-rule-docs.ts. Do not edit this section. */}

## Configure

Off by default. To turn it on:

```toml bunfig.toml
[lint.rules]
"unicorn/no-unreadable-iife" = "error" # or "warn"
```

{/* End of the generated section. */}

## Examples

Reported:

{/* bad */}
```js
const label = (() => (count === 1 ? "item" : "items"))();
```

Not reported:

{/* good */}
```js
const label = (() => {
  return count === 1 ? "item" : "items";
})();

const plain = count === 1 ? "item" : "items";

// no parentheses around the body
const now = (() => Date.now())();

// not called in place
const toPoint = (x, y) => ({ x, y });
```