---
title: Validator Notification Types
product: Form Library
description: Show warning and informational validation messages in SurveyJS forms without blocking submission. View this JavaScript demo to configure validator notification types.
framework: Angular
source: https://surveyjs.io/form-library/examples/validator-notification-types/angular
index: https://surveyjs.io/form-library/examples/overview.md
---

# Validator Notification Types (Angular)

Validators can display three types of notifications when validation fails: error (red), warning (orange), and informational note (blue). Errors block survey progress until resolved. Warnings indicate potential issues but don't block respondents from continuing the survey. Informational notes provide guidance without restrictions.

By default, validators display errors. To show a warning or informational note instead, set the validator's [`notificationType`](/form-library/documentation/api-reference/surveyvalidator#notificationType) property to `"warning"` or `"info"`. For the best user experience, enable immediate validation by setting the `SurveyModel`'s [`checkErrorsMode`](/form-library/documentation/api-reference/survey-data-model#checkErrorsMode) property to `"onValueChanged"`.

> If multiple notification types are eligible to be displayed for a question, only the strongest type is shown. Warnings appear only after all errors are resolved, and notes appear only when no errors or warnings remain. Try entering an invalid email in the **Email address** field, then replace it with a valid one to see the error change to an informational note.

[Documentation: Data Validation](/form-library/documentation/data-validation (linkStyle))

## Files

### `src/app/components/json.ts`

```ts
export const json = {
  "title": "Support Request",
  "checkErrorsMode": "onValueChanged",
  "completeText": "Submit Request",
  "elements": [{
    "type": "text",
    "name": "fullName",
    "title": "Full name",
    "isRequired": true
  }, {
    "type": "radiogroup",
    "name": "triedWorkaround",
    "title": "Have you already tried the suggested troubleshooting steps?",
    "isRequired": true,
    "choices": [
      "Yes",
      "No"
    ],
    "validators": [{
      "type": "expression",
      "expression": "{triedWorkaround} <> 'No'",
      "text": "Please try the troubleshooting steps first. You can still submit this request if they did not help.",
      "notificationType": "warning"
    }]
  }, {
    "type": "dropdown",
    "name": "priority",
    "title": "Request priority",
    "isRequired": true,
    "choices": [
      "Low",
      "Normal",
      "High",
      "Critical"
    ],
    "validators": [{
      "type": "expression",
      "expression": "{priority} <> 'Critical'",
      "text": "Critical is reserved for outages and data loss. Your request can still be submitted.",
      "notificationType": "warning"
    }]
  }, {
    "type": "comment",
    "name": "details",
    "title": "Describe the issue",
    "isRequired": true,
    "textUpdateMode": "onTyping",
    "placeholder": "What happened, and what did you already try?",
    "validators": [{
      "type": "text",
      "minLength": 20,
      "text": "Your description is very short. Consider adding more details so we can process the request faster.",
      "notificationType": "warning"
    }]
  }, {
    "type": "text",
    "name": "email",
    "title": "Email address",
    "inputType": "email",
    "isRequired": true,
    "placeholder": "name@example.com",
    "validators": [{
      "type": "email",
      "text": "Please enter a valid email address."
    }, {
      "type": "expression",
      "expression": "{email} empty",
      "text": "We'll send status updates to this email.",
      "notificationType": "info"
    }]
  }]
}
;
```

### `src/app/components/survey.component.css`

```css
/* You can add your custom CSS here. */
```

### `src/app/components/survey.component.html`

```html
<survey [model]="model" style="position: absolute; top: 0; left: 0; right: 0; bottom: 0; height:100%"></survey>
```

### `src/app/components/survey.component.ts`

```ts
import { Component, OnInit } from "@angular/core";
import { Model } from "survey-core";
import { json } from "./json";
import "./survey.component.css";
import "survey-core/survey-core.min.css";

@Component({
    // tslint:disable-next-line:component-selector
    selector: "component-survey",
    templateUrl: "./survey.component.html",
    styleUrls: ["./survey.component.css"]
})
export class SurveyComponent implements OnInit {
    model: Model;
    ngOnInit() {
        const survey = new Model(json);
        survey.data = {
          triedWorkaround: "No",
          priority: "Critical",
          details: "Short description",
          email: "jane@example.com"
        };
        
        survey.validate();
        
        survey.onComplete.add((sender, options) => {
            console.log(JSON.stringify(sender.data, null, 3));
        });
        this.model = survey;
    }
}
```

### `src/app/components/theme.ts`

```ts
export const themeJson = {};
```

### `src/app/app.component.css`

```css

```

### `src/app/app.component.html`

```html
<component-survey></component-survey>
```

### `src/app/app.component.ts`

```ts
import { Component } from "@angular/core";

@Component({
    selector: "app-root",
    templateUrl: "./app.component.html",
    styleUrls: ["./app.component.css"]
})
export class AppComponent {
    title = "CodeSandbox";
}
```

### `src/app/app.module.ts`

```ts
import { BrowserModule } from "@angular/platform-browser";
import { NgModule } from "@angular/core";

import { AppComponent } from "./app.component";
import { SurveyModule } from "survey-angular-ui";
import { SurveyComponent } from "./components/survey.component";

@NgModule({
    declarations: [AppComponent, SurveyComponent],
    imports: [BrowserModule, SurveyModule],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule { }
```

### `src/environments/environment.prod.ts`

```ts
export const environment = {
    production: true
};
```

### `src/environments/environment.ts`

```ts
// The file contents for the current environment will overwrite these during build.
// The build system defaults to the dev environment which uses `environment.ts`, but if you do
// `ng build --env=prod` then `environment.prod.ts` will be used instead.
// The list of which env maps to which file can be found in `.angular-cli.json`.

export const environment = {
    production: false
};
```

### `src/index.html`

```html
<link href="https://fonts.googleapis.com/css?family=Open%20Sans:400,600&display=swap" rel="stylesheet">
<app-root></app-root>
```

### `src/main.ts`

```ts
import { enableProdMode } from "@angular/core";
import { platformBrowserDynamic } from "@angular/platform-browser-dynamic";

import { AppModule } from "./app/app.module";
import { environment } from "./environments/environment";

if (environment.production) {
    enableProdMode();
}

platformBrowserDynamic()
    .bootstrapModule(AppModule)
    .catch(err => console.log(err));
```

### `src/polyfills.ts`

```ts
/**
 * This file includes polyfills needed by Angular and is loaded before the app.
 * You can add your own extra polyfills to this file.
 *
 * This file is divided into 2 sections:
 *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
 *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
 *      file.
 *
 * The current setup is for so-called "evergreen" browsers; the last versions of browsers that
 * automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
 * Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
 *
 * Learn more in https://angular.io/docs/ts/latest/guide/browser-support.html
 */

/***************************************************************************************************
 * BROWSER POLYFILLS
 */

/** IE9, IE10 and IE11 requires all of the following polyfills. **/
// import 'core-js/es6/symbol';
// import 'core-js/es6/object';
// import 'core-js/es6/function';
// import 'core-js/es6/parse-int';
// import 'core-js/es6/parse-float';
// import 'core-js/es6/number';
// import 'core-js/es6/math';
// import 'core-js/es6/string';
// import 'core-js/es6/date';
// import 'core-js/es6/array';
// import 'core-js/es6/regexp';
// import 'core-js/es6/map';
// import 'core-js/es6/weak-map';
// import 'core-js/es6/set';

/** IE10 and IE11 requires the following for NgClass support on SVG elements */
// import 'classlist.js';  // Run `npm install classlist.js`.

/** IE10 and IE11 requires the following for the Reflect API. */
// import 'core-js/es6/reflect';

/** Evergreen browsers require these. **/
// Used for reflect-metadata in JIT. If you use AOT (and only Angular decorators), you can remove.
import "core-js/proposals/reflect-metadata";

/**
 * Required to support Web Animations `@angular/platform-browser/animations`.
 * Needed for: All but Chrome, Firefox and Opera. http://caniuse.com/#feat=web-animation
 **/
// import 'web-animations-js';  // Run `npm install web-animations-js`.

/***************************************************************************************************
 * Zone JS is required by default for Angular itself.
 */
import "zone.js/dist/zone"; // Included with Angular CLI.

/***************************************************************************************************
 * APPLICATION IMPORTS
 */
```

### `src/styles.css`

```css
/* You can add your custom CSS here. */
```

### `src/typings.d.ts`

```ts
/* SystemJS module definition */
declare var module: NodeModule;
interface NodeModule {
    id: string;
}
```

### `.angular-cli.json`

```json
{
  "apps": [
    {
      "root": "src",
      "outDir": "dist",
      "assets": [ "assets", "favicon.ico" ],
      "index": "index.html",
      "main": "main.ts",
      "polyfills": "polyfills.ts",
      "prefix": "app",
      "styles": [ "styles.css" ],
      "scripts": [ ],
      "environmentSource": "environments/environment.ts",
      "environments": {
        "dev": "environments/environment.ts",
        "prod": "environments/environment.prod.ts"
      }
    }
  ]
}
```

### `_tsconfig.json`

```json
{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "allowSyntheticDefaultImports": true,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "moduleResolution": "node",
    "importHelpers": true,
    "resolveJsonModule": true,
    "target": "es2015",
    "module": "es2020",
    "lib": [
      "es2018",
      "dom"
    ]
  }
}
```

### `package.json`

```json
{
  "name": "surveyjs-angular",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build --prod",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "14.1.1",
    "@angular/cdk": "14.1.1",
    "@angular/common": "14.1.1",
    "@angular/compiler": "14.1.1",
    "@angular/core": "14.1.1",
    "@angular/forms": "14.1.1",
    "@angular/platform-browser": "14.1.1",
    "@angular/platform-browser-dynamic": "14.1.1",
    "@angular/router": "14.1.1",
    "core-js": "3.6.4",
    "rxjs": "6.5.4",
    "survey-core": "latest",
    "survey-angular-ui": "latest",
    "tslib": "1.13.0",
    "zone.js": "0.11.7"
  },
  "devDependencies": {
    "@angular/cli": "1.6.6",
    "@angular/compiler-cli": "^5.2.0",
    "@angular/language-service": "^5.2.0",
    "@types/core-js": "0.9.46",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "^4.0.1",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~4.1.0",
    "tslint": "~5.9.1",
    "typescript": "3.9.7"
  },
  "keywords": [ "angular", "surveyjs" ],
  "description": "SurveyJS-Angular example project"
}
```

## Other Frameworks

- [React](https://surveyjs.io/form-library/examples/validator-notification-types/reactjs.md)
- [Vue 3](https://surveyjs.io/form-library/examples/validator-notification-types/vue3js.md)
- [jQuery](https://surveyjs.io/form-library/examples/validator-notification-types/jquery.md)
- [Vanilla JS](https://surveyjs.io/form-library/examples/validator-notification-types/vanillajs.md)