JS Built-ins
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ObjecttoLocaleStringbeginner

toLocaleString() — plain object default

📖 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.

Object.prototype.toLocaleString()

obj.toLocaleString() calls toString() by default for plain objects, returning "[object Object]".

It is designed to be overridden by subclasses (like Date, Number, Array) that have locale-specific string representations.

Challenge: Implement getLocaleString(obj) that returns the locale string of the object.

💡 Hints (1)
  • • Plain objects inherit toLocaleString from Object.prototype, which calls toString()