String.prototype.slice() - JavaScript | MDN

• Character/Unicode Access: charAt(), charCodeAt()
• String Manipulation: concat(), replace(), split(), substring()
• Case Conversion: toLowerCase(), toUpperCase()
• Whitespace Handling: trim()
• Search and Check: includes(), indexOf(), lastIndexOf(), startsWith(), endsWith()
• Repetition: repeat()

Character/Unicode Access

String Manipulation

Case Conversion

Whitespace Handling

Search and Check

Repetition