isAscii function

bool isAscii(
  1. String str
)

Checks if the string contains only ASCII characters.

Returns true if the string only contains ASCII characters (code points 0-127), otherwise returns false.

Example:

isAscii('abc123'); // true
isAscii('äbc123'); // false

Implementation

bool isAscii(String str) => _isAscii(str);