eslint-plugin-math

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math/no-static-nan-calculations ​

disallow static calculations that result in NaN

  • ⚙️ This rule is included in "plugin:math/recommended".
  • 💡 Some problems reported by this rule are manually fixable by editor suggestions.

📖 Rule Details ​

This rule disallows static calculations that result in NaN (Not a Number).

This rule enforces explicit use of NaN or Number.NaN instead of calculations that implicitly produce NaN values.

Using explicit NaN values provides several benefits:

  • Clear intent: Makes it obvious that NaN is the intended result
  • Better readability: Reduces cognitive load when reading code
  • Consistency: Standardizes how NaN values are represented
  • Debugging clarity: Easier to identify intentional vs accidental NaN values
  • Code maintainability: Explicit NaN usage is more self-documenting

This rule helps catch expressions that will always evaluate to NaN at development time and suggests using explicit NaN constants instead.

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🔧 Options ​

Nothing.

📚 Further reading ​

🚀 Version ​

This rule was introduced in eslint-plugin-math v0.5.0

🔍 Implementation ​