JS Built-ins
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ObjecttoLocaleStringintermediate

toLocaleString() — array delegation

📖 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() — arrays

Arrays have their own toLocaleString() that calls toLocaleString() on each element and joins them with a locale-specific separator.

Challenge: Verify array's toLocaleString behavior.

💡 Hints (1)
  • • Array.prototype.toLocaleString calls toLocaleString on each element