HasAllowedCharPattern (Vaadin Platform (vaadin-platform-javadoc) 23.3.32 API)

All Superinterfaces:

HasElement, Serializable

All Known Implementing Classes:

AbstractNumberField, ComboBox, ComboBoxBase, DatePicker, EmailField, IntegerField, MultiSelectComboBox, NumberField, PasswordField, TextArea, TextField, TimePicker
```
public interface HasAllowedCharPattern
extends HasElement
```
Mixin interface for field components that support setting allowed char pattern to prevent user from entering invalid characters when typing or pasting text.

Author:

Vaadin Ltd

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default String`	`getAllowedCharPattern()`	A regular expression that the user input is checked against.
`default void`	`setAllowedCharPattern(String pattern)`	Sets a regular expression for the user input to pass on the client-side.

Methods inherited from interface com.vaadin.flow.component.HasElement
getElement

- Method Detail
  - getAllowedCharPattern
```
default String getAllowedCharPattern()
```
    A regular expression that the user input is checked against. The allowed pattern must matches a single character, not the sequence of characters.
    
    Returns:
    
    the allowedCharPattern property
  - setAllowedCharPattern
```
default void setAllowedCharPattern(String pattern)
```
    Sets a regular expression for the user input to pass on the client-side. The allowed char pattern must be a valid JavaScript Regular Expression that matches a single character, not the sequence of characters.
    For example, to allow entering only numbers and slash character, use setAllowedCharPattern("[0-9/]")`.
    
    Parameters:
    
    pattern - the String pattern to set