JS Practice — Built-in Objects

String.prototype.toLocaleUpperCase() — empty string

📖 Usage Example

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

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

String.prototype.toLocaleUpperCase() — Empty String

Calling toLocaleUpperCase() on an empty string returns an empty string.

Challenge: Implement safeLocaleUpper(str) and handle the empty string case.

safeLocaleUpper('') // → ''
safeLocaleUpper('hi') // → 'HI'

💡 Hints (1)