JS Practice — Built-in Objects

String.prototype.trimEnd() — both ends → only leading preserved

📖 Usage Example

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

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

String.prototype.trimEnd() — Only Trailing Removed

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

Challenge: Implement keepLeading(str) using trimEnd.

keepLeading('   hello   ') // → '   hello'

💡 Hints (1)

• Compare `trim()` (both ends) vs `trimEnd()` (right end only) vs `trimStart()` (left end only).