Vue Validator - RequiredRule
import { RequiredRule } from "devextreme/common"
Type:
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
App.vue- <template>
- <DxTextBox>
- <DxValidator>
- <DxRequiredRule
- message="My custom message"
- />
- </DxValidator>
- </DxTextBox>
- </template>
- <script>
- import 'devextreme/dist/css/dx.light.css';
- import { DxTextBox } from 'devextreme-vue/text-box';
- import {
- DxValidator,
- DxRequiredRule
- } from 'devextreme-vue/validator';
- export default {
- components: {
- DxTextBox,
- DxValidator,
- DxRequiredRule
- }
- }
- </script>
Hide the message
App.vue- <template>
- <DxTextBox>
- <DxValidator>
- <DxRequiredRule
- message=""
- />
- </DxValidator>
- </DxTextBox>
- </template>
- <script>
- import 'devextreme/dist/css/dx.light.css';
- import { DxTextBox } from 'devextreme-vue/text-box';
- import {
- DxValidator,
- DxRequiredRule
- } from 'devextreme-vue/validator';
- export default {
- components: {
- DxTextBox,
- DxValidator,
- DxRequiredRule
- }
- }
- </script>
Display the editor's name in the message
App.vue- <template>
- <DxTextBox>
- <!-- The error message will be "Password is required" -->
- <DxValidator name="Password">
- <DxRequiredRule />
- </DxValidator>
- </DxTextBox>
- </template>
- <script>
- import 'devextreme/dist/css/dx.light.css';
- import { DxTextBox } from 'devextreme-vue/text-box';
- import {
- DxValidator,
- DxRequiredRule
- } from 'devextreme-vue/validator';
- export default {
- components: {
- DxValidator,
- DxRequiredRule
- }
- }
- </script>
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