Vue Validator - CompareRule
A validation rule that demands that a validated editor has a value that is equal to a specified expression.
To specify the expression that the validated field must match, set the rule's comparisonTarget configuration property. Assign a function to this property. The validated value will be compared to the function's return value. The comparison will be performed by using the operator that is set for the comparisonType property.
See Also
comparisonTarget
The rule is valid if the comparison between the validated value and the return value of the comparisonTarget function evaluates to true. The operator specified by the comparisonType property is used to compare values.
comparisonType
Specifies the operator to be used for comparing the validated value with the target.
message
An error message can be specified as follows:
Hard-code the message
jQuery
index.js$(function() { $("#textBox").dxTextBox({ ... }) .dxValidator({ type: "compare", message: "My custom message" }); });
Angular
app.component.htmlapp.module.ts<dx-text-box> <dx-validator> <dxi-validation-rule type="compare" message="My custom message"> </dxi-validation-rule> </dx-validator> </dx-text-box>
import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { AppComponent } from './app.component'; import { DxValidatorModule, DxTextBoxModule } from 'devextreme-angular'; @NgModule({ declarations: [ AppComponent ], imports: [ DxTextBoxModule, BrowserModule, DxValidatorModule ], providers: [], bootstrap: [AppComponent] }) export class AppModule { }
Vue
App.vue<template> <DxTextBox> <DxValidator> <DxCompareRule message="My custom message" /> </DxValidator> </DxTextBox> </template> <script> import 'devextreme/dist/css/dx.light.css'; import { DxTextBox } from 'devextreme-vue/text-box'; import { DxValidator, DxCompareRule } from 'devextreme-vue/validator'; export default { components: { DxTextBox, DxValidator, DxCompareRule } } </script>
React
App.jsimport React from 'react'; import 'devextreme/dist/css/dx.light.css'; import { TextBox } from 'devextreme-react/text-box'; import { Validator, CompareRule } from 'devextreme-react/validator'; class App extends React.Component { render() { return ( <TextBox> <Validator> <CompareRule message="My custom message" /> </Validator> </TextBox> ); } } export default App;
Hide the message
jQuery
index.js$(function() { $("#textBox").dxTextBox({ ... }) .dxValidator({ type: "compare", message: "" }); });
Angular
app.component.htmlapp.module.ts<dx-text-box> <dx-validator> <dxi-validation-rule type="compare" message=""> </dxi-validation-rule> </dx-validator> </dx-text-box>
import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { AppComponent } from './app.component'; import { DxValidatorModule, DxTextBoxModule } from 'devextreme-angular'; @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, DxValidatorModule, DxTextBoxModule ], providers: [], bootstrap: [AppComponent] }) export class AppModule { }
Vue
App.vue<template> <DxTextBox> <DxValidator> <DxCompareRule message="" /> </DxValidator> </DxTextBox> </template> <script> import 'devextreme/dist/css/dx.light.css'; import { DxTextBox } from 'devextreme-vue/text-box'; import { DxValidator, DxCompareRule } from 'devextreme-vue/validator'; export default { components: { DxTextBox, DxValidator, DxCompareRule } } </script>
React
App.jsimport React from 'react'; import 'devextreme/dist/css/dx.light.css'; import { TextBox } from 'devextreme-react/text-box'; import { Validator, CompareRule } from 'devextreme-react/validator'; class App extends React.Component { render() { return ( <TextBox> <Validator> <CompareRule message="" /> </Validator> </TextBox> ); } } export default App;
Display the editor's name in the message
jQuery
index.js$(function() { $("#textBox").dxTextBox({ ... }) .dxValidator({ name: "Passwords", // The error message will be "Passwords do not match" validationRules: [{ type: "compare" }] }); });
Angular
app.component.htmlapp.module.ts<dx-text-box> <!-- The error message will be "Passwords do not match" --> <dx-validator name="Passwords"> <dxi-validation-rule type="compare"> </dxi-validation-rule> </dx-validator> </dx-text-box>
import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { AppComponent } from './app.component'; import { DxValidatorModule, DxTextBoxModule } from 'devextreme-angular'; @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, DxValidatorModule, DxTextBoxModule ], providers: [], bootstrap: [AppComponent] }) export class AppModule { }
Vue
App.vue<template> <DxTextBox> <!-- The error message will be "Passwords do not match" --> <DxValidator name="Passwords"> <DxCompareRule /> </DxValidator> </DxTextBox> </template> <script> import 'devextreme/dist/css/dx.light.css'; import { DxTextBox } from 'devextreme-vue/text-box'; import { DxValidator, DxCompareRule } from 'devextreme-vue/validator'; export default { components: { DxValidator, DxCompareRule } } </script>
React
App.jsimport React from 'react'; import 'devextreme/dist/css/dx.light.css'; import { TextBox } from 'devextreme-react/text-box'; import { Validator, CompareRule } from 'devextreme-react/validator'; class App extends React.Component { render() { return ( <TextBox> {/* The error message will be "Passwords do not match" */} <Validator name="Passwords"> <CompareRule} /> </Validator> </TextBox> ); } } export default App;
type
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