JS Practice — Built-in Objects

String.prototype.startsWith() — no match

📖 Usage Example

const str = 'Hello, World!'
str.startsWith('Hello')         // → true
str.startsWith('World')         // → false
str.startsWith('World', 7)      // → true

Use startsWith() to check if a string begins with a specific prefix, with an optional start position.

String.prototype.startsWith() — No Match

Returns false when the string does not start with the given prefix.

Challenge: Implement doesNotStartWithA(str) that returns true if str does NOT start with 'A'.

doesNotStartWithA('Banana') // → false
doesNotStartWithA('cherry') // → true

💡 Hints (1)

• `startsWith` is case-sensitive, so `"a"` and `"A"` are different.