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.

const x = y | z; 
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Rule Details

This rule disallows bitwise operators.

Examples of incorrect code for this rule:

/*eslint no-bitwise: "error"*/ let x = y | z; const x1 = y & z; const x2 = y ^ z; const x3 = ~ z; const x4 = y << z; const x5 = y >> z; const x6 = y >>> z; x |= y; x &= y; x ^= y; x <<= y; x >>= y; x >>>= y; 
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Examples of correct code for this rule:

/*eslint no-bitwise: "error"*/ let x = y || z; const x1 = y && z; const x2 = y > z; const x3 = y < z; x += y; 
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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; 
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int32Hint

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

/*eslint no-bitwise: ["error", { "int32Hint": true }] */ const b = a|0; 
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Version

This rule was introduced in ESLint v0.0.2.

Resources

• Rule source
• Tests source