JS Practice — Built-in Objects

String.prototype.trimStart() — both ends → only trailing preserved

📖 Usage Example

'  hello  '.trimStart()   // → 'hello  '
'   text'.trimStart()    // → 'text'
'hi'.trimStart()          // → 'hi'

Use trimStart() to remove only leading whitespace from the beginning of a string, leaving trailing whitespace intact.

String.prototype.trimStart() — Only Leading Removed

When both leading and trailing whitespace exist, trimStart() leaves the trailing intact.

Challenge: Implement keepTrailing(str) using trimStart.

keepTrailing('   hello   ') // → 'hello   '

💡 Hints (1)