JS Practice — Built-in Objects

String.prototype.toLocaleLowerCase() — basic ASCII lowercase

📖 Usage Example

'HELLO'.toLocaleLowerCase()   // → 'hello'
'WORLD'.toLocaleLowerCase()   // → 'world'
'ABC123'.toLocaleLowerCase()  // → 'abc123'

Use toLocaleLowerCase() to convert a string to lowercase using the locale-specific rules of the host environment.

String.prototype.toLocaleLowerCase()

str.toLocaleLowerCase() converts a string to lowercase using the host locale's rules. For ASCII strings, the result is deterministic and identical to toLowerCase().

Challenge: Implement localeLower(str) that converts the string to lowercase.

localeLower('HELLO') // → 'hello'

💡 Hints (1)

• For ASCII strings, `toLocaleLowerCase()` behaves identically to `toLowerCase()`.