JS Built-ins
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ObjecttoLocaleStringbeginner

toLocaleString() — inherited from Object.prototype

📖 Usage Example
// Get locale-aware string representation
const date = new Date(2024, 0, 1)
date.toLocaleString()   // → locale-specific date string
const num = 1234567
num.toLocaleString()    // → '1,234,567'

Use toLocaleString() to get a locale-sensitive string representation of a value, most useful on Date and Number objects.

toLocaleString() — inheritance

toLocaleString() is defined on Object.prototype, so all objects inherit it. Subclasses like Array, Number, and Date override it with locale-aware implementations.

Challenge: Verify that plain objects inherit toLocaleString from Object.prototype.

💡 Hints (1)
  • • Check hasOwnProperty to determine where toLocaleString comes from