JS Built-ins
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URLadvanced

URL#toJSON() — used by JSON.stringify()

📖 Usage Example
new URL('https://a.com').href  // → 'https://a.com/'

href returns the full normalized URL string including trailing slash.

URL#toJSON() — JSON serialization

JSON.stringify() calls toJSON() on objects that have it. This means a URL inside an object serializes to its string form automatically.

Challenge: Verify that JSON.stringify({ endpoint: url }) serializes the URL correctly.

💡 Hints (1)
  • • JSON.stringify automatically calls toJSON() — URL serializes as its href string