JS Practice — Built-in Objects

String.prototype.codePointAt() — surrogate at position 1

📖 Usage Example

const str = 'Hello'
str.codePointAt(0)     // → 72
'😀'.codePointAt(0)    // → 128512

Use codePointAt() to get the full Unicode code point at a position, correctly handling supplementary characters.

String.prototype.codePointAt() — Surrogate Position

An emoji stored as a surrogate pair occupies positions 0 and 1. .codePointAt(1) returns the low surrogate code unit.

Challenge: Implement lowSurrogate() that returns the code point of '😀' at position 1 (the low surrogate).

lowSurrogate() // → 56832  (0xDE00)

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