JS Practice — Built-in Objects

String.prototype.length — empty string length 0

📖 Usage Example

'hello'.length    // → 5
''.length         // → 0
'😀'.length       // → 2

The length property returns the number of UTF-16 code units in the string.

String.prototype.length — Empty String

An empty string '' has a length of 0.

Challenge: Implement isEmpty(str) that returns true if the string has length 0.

isEmpty('')      // → true
isEmpty('hello') // → false

💡 Hints (1)