Is it possible to minimize the number of accessors needed for reactive forms?

Currently, I am dealing with a reactive form that consists of 20 different inputs. An example of one input is shown below:

<input formControlName="name" matInput>

For each input, I find myself needing to write an accessor function like the one below:

 get nameControl(): AbstractControl {
    return this.form.get('name');
}

Having to create 20 separate functions for each input seems inefficient. Is there a more efficient way to handle this task since accessors do not accept any arguments?

Answer №1

Hello there,

From what I gather, all you need is to create a single method that takes the fieldName:

getControl(name: string): AbstractControl {
 return this.form.get(name);
}

If you want to check if a control has a specific error, you can implement something like this in the component:

hasError(fieldName: string, errorLabel: string): boolean {
 return this.form.controls[fieldName].errors[errorLabel] !== undefined;
}

Next, in the template:

<p *ngIf="hasError('surname', 'required')" class="message is-danger">
  The surname is mandatory
</p>

This will display the error message.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Transforming JSON data into XML using Angular 7

It turns out the xml2js npm package I was using doesn't support converting JSON to XML, which is exactly what I need for my API that communicates with an application only accepting XML format. In my service file shipment.service.ts import { Injecta ...

Utilizing MongoDB query for geoLocation with maxDistance parameter

Customer location: customerCoordinates: [83,24] stores: { id:1, location: {coordinates:[85,44]...} maxRadiusDelivery: 2000 //meters }, { id:2, location: {coordinates:[82,34]...} maxRadiusDelivery: 100 //meters } Query: db.wh.find({ 'locati ...

What could be causing my Angular 7 header to be unresponsive?

I am facing issues with my http, header, and RequestOption in the API. I am working with Angular 7.1 and have tried various methods to resolve the problem without success. The error message I am receiving is: The token is not being passed in the header ...

Tips for resolving this unhandled error in React TypeScript

After creating a program in React TypeScript, I encountered an uncaught error. Despite running and debugging tests and conducting extensive research on Google, I have been unable to resolve this issue on my own. Therefore, I am reaching out for assistance ...

Angular2 ngFor, encountering undefined property

Having an issue where one of my properties is showing as "undefined" even though it is defined. Can't seem to find a solution: I have a parent component with the following data: @Component({ selector: "app-my-products", templateUrl: ...

Retrieve the stored information from a variable

Can anyone help me with a coding issue I'm facing? I have a constant called data, which contains two values - prediction and probability. What is the best way to access and retrieve both values? type ML = { prediction: string; probability: num ...

Carousel-item height in Bootstrap 4.6

I am facing an issue with a component in Angular 14 using Bootstrap v4.6: <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel"> <div class="carousel-inner"> <div cl ...

Is there a specific type of function missing in Typescript?

I am facing a challenge in converting an existing JavaScript code to Typescript. The original javascript code is as follows: object.getsomething( function(err, result) { // async }); I am confused about how to properly type the parameter "function(er ...

Receiving the [object HTMLInputElement] on the screen rather than a numerical value

I have an input box where a user can enter a number. When they click a button, I want that number to be displayed on the page. However, instead of seeing the number, I am getting the output as [object HTMLInputElement]. Below is my TypeScript code: let qu ...

Get started with adding a Typescript callback function to the Facebook Login Button

I am in the process of implementing Facebook login into my Angular7 application using Typescript. Although I have successfully integrated Facebook's Login Button plugin for logging in, I am facing issues with providing a callback method to the button& ...

Unable to locate 'http' in error handling service for Angular 6

My current project involves creating an Error Handling Service for an Angular 6 Application using the HTTP Interceptor. The main goal of this service is to capture any HTTP errors and provide corresponding error codes. However, my lack of familiarity with ...

Setting up domain or IP Address in Angular with Spring Boot: A step-by-step guide

I'm facing an issue with my Angular 11 application hosted in the public folder of a Spring project. The Spring project is running on port 8075, and when I access my application from localhost:8075, everything works perfectly fine. However, when I try ...

What is the best way to obtain an error as an object when subscribing to an HTTP GET request

I am working on an asp.net core webApi along with an Angular9 WebApp. My goal is to retrieve the error in a subscribe as an object rather than just a string. this.http.post<TestSystem>(this.url, testsystem).subscribe((result) => { // do someth ...

The .ts source file is mysteriously missing from the development tool's view after being deployed

When I work locally, I can see the .ts source files, but once I deploy them, they are not visible in any environment. Despite setting my sourcemap to true and configuring browserTargets for serve, it still doesn't work. Can someone help with this issu ...

Adding a # before each routing path: A step-by-step guide

One key difference between Angular 1 and Angular 4 is that in Angular 1, the routing path always includes a "#" symbol, whereas in Angular 4, it does not. I believe there may be a way to configure this function based on what I observed in the ng-bootstrap ...

Guide for integrating CryptoJS with Angular 2 and TypeScript within a WebPack build setup

Looking for advice on integrating the CryptoJS library with Angular 2 using TypeScript? Many existing resources are outdated and assume the use of SystemJS. Can someone provide straightforward instructions for incorporating CryptoJS with Angular 2 and Type ...

Is Typescript familiar with the import -> require syntax, but unfamiliar with the require -> import syntax?

My code includes a simple file that utilizes the ES6 module loader: 1.ts import {foo} from "./2" foo('hello'); 2.ts function foo (a){console.log(a);}; export {foo} When the tsconfig is configured as follows: "module": "commonjs", We can o ...

Can one integrate various angular components constructed using distinct versions of Angular?

Is it feasible to utilize various angular components (custom elements) created with different versions of Angular? I've heard concerns about zone.js causing global scope pollution. Appreciate your response! ...

Issue with RouterLink functionality in Angular 6

While following a Brad Traversy tutorial on coding, I implemented the instructions exactly as given. Below is my 'app.module.ts' file. import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/c ...

Swap out the default URL in components with the global constant

Could anyone offer some assistance with this task I have at hand: Let's imagine we have a global constant 'env' that I need to use to replace template URLs in components during build time. Each component has a default template URL, but for ...