JS Practice — Built-in Objects

String.prototype.padStart() — custom fill string

📖 Usage Example

'5'.padStart(3, '0')       // → '005'
'hi'.padStart(5, '-')     // → '---hi'
'hello'.padStart(3)       // → 'hello'

Use padStart() to pad the beginning of a string with a fill character until it reaches the target length.

String.prototype.padStart() — Custom Fill

Pass a custom fill string to pad with something other than spaces or zeros.

Challenge: Implement padStars(str, len) that pads the start with '*'.

padStars('hi', 5) // → '***hi'

💡 Hints (1)