URLSearchParamsintermediate

URLSearchParams#size — set does not add duplicate

📖 Usage Example

const p = new URLSearchParams('a=1&a=2')
p.size  // → 2 (counts each entry)

size counts each key-value entry individually, including duplicate keys.

URLSearchParams#size — set

set() replaces all values for a key with one entry, so it does not increase size for existing keys.

Challenge: Verify size after set() on an existing key.

💡 Hints (1)

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