substring

substring(string, start, end?) → string · String

Extract part of a string by index (zero-based).

• string (required): the source string

• start (required): starting index (zero-based, inclusive)

• end (optional): ending index (exclusive). If omitted, goes to end.

substring("Hello World", 6)             // "World"
substring("Hello World", 0, 5)          // "Hello"