React Validator - RequiredRule
import { ValidationRulesTypes } from "devextreme-react/validation-rules"
Type:
ValidationRulesTypes.RequiredRule
Use this rule type to ensure the target editor value is specified. The rule will be broken in the following cases.
- If the validated value is null, false, or undefined.
- If the specified value has a type that is not expected for the target field (e.g., a string for the DateBox UI component).
See Also
message
Type:
Default Value: 'Required'
An error message can be specified as follows:
Hard-code the message
index.js- $(function() {
- $("#textBox").dxTextBox({ ... })
- .dxValidator({
- type: "required",
- message: "My custom message"
- });
- });
Hide the message
index.js- $(function() {
- $("#textBox").dxTextBox({ ... })
- .dxValidator({
- type: "required",
- message: ""
- });
- });
Display the editor's name in the message
index.js- $(function() {
- $("#textBox").dxTextBox({ ... })
- .dxValidator({
- name: "Password", // The error message will be "Password is required"
- validationRules: [{
- type: "required"
- }]
- });
- });
type
Type:
Accepted Values: 'required' | 'numeric' | 'range' | 'stringLength' | 'custom' | 'compare' | 'pattern' | 'email' | 'async'
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