# no-bitwise

Disallow bitwise operators

The use of bitwise operators in JavaScript is very rare and often `&`

or `|`

is simply a mistyped `&&`

or `||`

, which will lead to unexpected behavior.

`var x = y | z;`

## Rule Details

This rule disallows bitwise operators.

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

`/*eslint no-bitwise: "error"*/`

var x = y | z;

var x = y & z;

var x = y ^ z;

var x = ~ z;

var x = y << z;

var x = y >> z;

var x = y >>> z;

x |= y;

x &= y;

x ^= y;

x <<= y;

x >>= y;

x >>>= y;

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

`/*eslint no-bitwise: "error"*/`

var x = y || z;

var x = y && z;

var x = y > z;

var x = y < z;

x += y;

## Options

This rule has an object option:

`"allow"`

: Allows a list of bitwise operators to be used as exceptions.`"int32Hint"`

: Allows the use of bitwise OR in`|0`

pattern for type casting.

### allow

Examples of **correct** code for this rule with the `{ "allow": ["~"] }`

option:

`/*eslint no-bitwise: ["error", { "allow": ["~"] }] */`

~[1,2,3].indexOf(1) === -1;

### int32Hint

Examples of **correct** code for this rule with the `{ "int32Hint": true }`

option:

`/*eslint no-bitwise: ["error", { "int32Hint": true }] */`

var b = a|0;

## Version

This rule was introduced in ESLint v0.0.2.