isNullOrWhiteSpace property
bool
isNullOrWhiteSpace
Checks if the string is either null, empty, or contains only whitespace characters. This is useful for validating input fields where a meaningful string is required.
Example:
print(' '.isNullOrWhiteSpace); // Output: true
print('word'.isNullOrWhiteSpace); // Output: false
Implementation
bool get isNullOrWhiteSpace => trim().isEmpty;