---
title: Conditional Read-Only State
product: Form Library
description: You can make sure respondents don't get confused and provide only relevant information by using the enableIf property in questions that might be inapplicable to some of your respondents. With SurveyJS, you can easily enable or disable such dependent questions based on preconfigured conditions. View a free demo for JavaScript to learn more.
framework: Angular
source: https://surveyjs.io/form-library/examples/how-to-conditionally-make-input-field-read-only/angular
index: https://surveyjs.io/form-library/examples/overview.md
---

# Conditional Read-Only State (Angular)

Survey elements can dynamically switch between enabled and read-only states based on conditions. When disabled, elements remain visible but non-interactive until a specified expression (the [`enableIf`](https://surveyjs.io/form-library/documentation/api-reference/question#enableIf) property) evaluates to `true`. This provides an alternative to [conditional visibility](https://surveyjs.io/form-library/examples/implement-conditional-logic-to-change-question-visibility/) for skip logic and branching while preserving the full form structure.

This demo includes three scenarios:

- Employment intake         
Employer name, job title, and start date are enabled only when the respondent selects “Employed” as their current status.

- Insurance details         
Provider, member ID, and group number are enabled only when the respondent confirms they have health insurance.

- Purchase channel          
Order number is enabled for online purchases, while store location is enabled for in-store purchases.

For more details on conditional logic, refer to the following help topic:

[Conditional Logic and Dynamic Texts](/form-library/documentation/design-survey/conditional-logic (linkStyle))

## Files

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

```ts
export const json = {
  "elements": [
    {
      "type": "panel",
      "name": "employment",
      "title": "Employment",
      "elements": [
        {
          "type": "radiogroup",
          "name": "employmentStatus",
          "title": "Current employment status",
          "isRequired": true,
          "choices": [ "Employed", "Unemployed", "Retired", "Student" ],
          "colCount": 0
        },
        {
          "type": "text",
          "name": "employer",
          "title": "Current employer",
          "enableIf": "{employmentStatus} = 'Employed'"
        },
        {
          "type": "text",
          "name": "jobTitle",
          "title": "Job title",
          "enableIf": "{employmentStatus} = 'Employed'",
          "startWithNewLine": false
        },
        {
          "type": "text",
          "name": "employmentStartDate",
          "title": "Employment start date",
          "inputType": "date",
          "enableIf": "{employmentStatus} = 'Employed'"
        }
      ]
    },
    {
      "type": "panel",
      "name": "insurance",
      "title": "Insurance",
      "elements": [
        {
          "type": "boolean",
          "name": "hasInsurance",
          "title": "Do you have health insurance?",
          "isRequired": true
        },
        {
          "type": "text",
          "name": "insuranceProvider",
          "title": "Insurance provider",
          "enableIf": "{hasInsurance} = true"
        },
        {
          "type": "text",
          "name": "memberId",
          "title": "Member ID",
          "enableIf": "{hasInsurance} = true",
          "startWithNewLine": false
        },
        {
          "type": "text",
          "name": "groupNumber",
          "title": "Group number",
          "enableIf": "{hasInsurance} = true"
        }
      ]
    },
    {
      "type": "panel",
      "name": "returnRequest",
      "title": "Return request",
      "elements": [
        {
          "type": "radiogroup",
          "name": "purchaseChannel",
          "title": "Where did you purchase the item?",
          "isRequired": true,
          "choices": [ "Online", "In store" ],
          "colCount": 0
        },
        {
          "type": "text",
          "name": "orderNumber",
          "title": "Order number",
          "enableIf": "{purchaseChannel} = 'Online'"
        },
        {
          "type": "dropdown",
          "name": "storeLocation",
          "title": "Store location",
          "enableIf": "{purchaseChannel} = 'In store'",
          "startWithNewLine": false,
          "choices": [ "Downtown", "Westside Mall", "Airport" ]
        }
      ]
    }
  ]
}
;
```

### `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.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
<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/how-to-conditionally-make-input-field-read-only/reactjs.md)
- [Vue 3](https://surveyjs.io/form-library/examples/how-to-conditionally-make-input-field-read-only/vue3js.md)
- [jQuery](https://surveyjs.io/form-library/examples/how-to-conditionally-make-input-field-read-only/jquery.md)
- [Vanilla JS](https://surveyjs.io/form-library/examples/how-to-conditionally-make-input-field-read-only/vanillajs.md)