math/prefer-math-sqrt1-2

enforce the use of Math.SQRT1_2 instead of other ways

• ⚙️ This rule is included in "plugin:math/recommended".
• 🔧 The --fix option on the command line can automatically fix some of the problems reported by this rule.
• 💡 Some problems reported by this rule are manually fixable by editor suggestions.

📖 Rule Details

This rule aims to enforce the use of Math.SQRT1_2 instead of other ways to represent the square root of 1/2.

Math.SQRT1_2 provides several advantages over manual calculations:

• Clarity of intent: Immediately obvious that you're using √(1/2) or 1/√2
• Precision: Provides the most accurate representation available in JavaScript
• Performance: Direct constant access instead of function call overhead
• Mathematical significance: Represents a fundamental constant in trigonometry and linear algebra
• Readability: More expressive than complex calculations

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🔧 Options

Nothing.

📚 Further reading

• MDN - Math.SQRT1_2
• MDN - Math.sqrt()

🚀 Version

This rule was introduced in eslint-plugin-math v0.4.0

🔍 Implementation

• Rule source
• Test source
• Test fixture sources