[pve-eslint.git] / eslint / docs / src / rules / no-with.md

---
title: no-with
rule_type: suggestion
further_reading:
- https://web.archive.org/web/20200717110117/https://yuiblog.com/blog/2006/04/11/with-statement-considered-harmful/
---


The `with` statement is potentially problematic because it adds members of an object to the current scope, making it impossible to tell what a variable inside the block actually refers to.

## Rule Details

This rule disallows `with` statements.

If ESLint parses code in strict mode, the parser (instead of this rule) reports the error.

Examples of **incorrect** code for this rule:

::: incorrect

```js
/*eslint no-with: "error"*/

with (point) {
    r = Math.sqrt(x * x + y * y); // is r a member of point?
}
```

:::

Examples of **correct** code for this rule:

::: correct

```js
/*eslint no-with: "error"*/
/*eslint-env es6*/

const r = ({x, y}) => Math.sqrt(x * x + y * y);
```

:::

## When Not To Use It

If you intentionally use `with` statements then you can disable this rule.
Commit	Line	Data
	1	---
	2	title: no-with
	3	rule_type: suggestion
	4	further_reading:
	5	- https://web.archive.org/web/20200717110117/https://yuiblog.com/blog/2006/04/11/with-statement-considered-harmful/
	6	---
	7
	8
	9
	10	The `with` statement is potentially problematic because it adds members of an object to the current scope, making it impossible to tell what a variable inside the block actually refers to.
	11
	12	## Rule Details
	13
	14	This rule disallows `with` statements.
	15
	16	If ESLint parses code in strict mode, the parser (instead of this rule) reports the error.
	17
	18	Examples of incorrect code for this rule:
	19
	20	::: incorrect
	21
	22	```js
	23	/eslint no-with: "error"/
	24
	25	with (point) {
	26	r = Math.sqrt(x * x + y * y); // is r a member of point?
	27	}
	28	```
	29
	30	:::
	31
	32	Examples of correct code for this rule:
	33
	34	::: correct
	35
	36	```js
	37	/eslint no-with: "error"/
	38	/eslint-env es6/
	39
	40	const r = ({x, y}) => Math.sqrt(x * x + y * y);
	41	```
	42
	43	:::
	44
	45	## When Not To Use It
	46
	47	If you intentionally use `with` statements then you can disable this rule.