regexFilter property
RegExp
get
regexFilter
A regular expression that defines the allowed characters for input.
By default, this allows any combination of letters and numbers.
Example:
RegExp(r'[a-zA-Z0-9]'); // input: "abc123" | output: "abc123"
To allow only numbers:
Example:
RegExp(r'[0-9]'); // input: "abc123" | output: "123"
This regular expression can be adjusted to restrict the input to specific character sets (e.g., alphanumeric only, letters and numbers with hyphens, etc.).
Implementation
RegExp get regexFilter => RegExp(r'[a-zA-Z0-9]');