JS Practice — Built-in Objects

String.prototype.endsWith() — case-sensitive

📖 Usage Example

const str = 'Hello, World!'
str.endsWith('!')        // → true
str.endsWith('World')    // → false
str.endsWith('World', 12) // → true

Use endsWith() to check if a string ends with a specific suffix, with an optional end position.

String.prototype.endsWith() — Case Sensitivity

.endsWith() is case-sensitive: 'Hello'.endsWith('o') → true but 'Hello'.endsWith('O') → false.

Challenge: Implement endsWithO(str) that checks if str ends with lowercase 'o'.

endsWithO('hello') // → true
endsWithO('hellO') // → false

💡 Hints (1)