eslint/no-bitwise Restriction

What it does

Disallow bitwise operators

Why is this bad?

The use of bitwise operators in JavaScript is very rare and often & or | is simply a mistyped && or ||, which will lead to unexpected behavior.

Examples

Examples of incorrect code for this rule:

var x = y | z;

var x = y ^ z;

var x = y >> z;

Examples of correct code for this rule:

var x = y || z;

var x = y && z;

var x = y > z;

Options

allow

{ type: string[], default: [] }

The allow option permits the given list of bitwise operators to be used as exceptions to this rule.

For example { "allow": ["~"] } would allow the use of the bitwise operator ~ without restriction. Such as in the following:

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

int32Hint

{ type: boolean, default: false }

When set to true the int32Hint option allows the use of bitwise OR in |0 pattern for type casting.

For example with { "int32Hint": true } the following is permitted:

const b = a | 0;

How to use

To enable this rule in the CLI or using the config file, you can use:

CLI

oxlint --deny no-bitwise

Config (.oxlintrc.json)

{
  "rules": {
    "no-bitwise": "error"
  }
}

References

• Rule Source