JS Practice — Built-in Objects

String.prototype.endsWith() — endPosition parameter

📖 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() — endPosition

The optional second argument endPosition treats the string as if it only goes up to that index.

'Hello World'.endsWith('Hello', 5) // → true

Challenge: Implement endsWithHello(str) that checks if the first 5 characters end with 'Hello'.

💡 Hints (1)