Obtaining distinct form control values for replicated form fields with Angular

Issue with Dynamic Form Duplicates:

I am currently working with a reactive form that has two fields - name and value. There is an add button that duplicates the form by copying these fields. The challenge I am facing is with updating the values of the duplicated forms correctly.

Problem Description:

When I duplicate the form and enter new values for the value field, the respective popup button displays all the values entered so far in any version of the form. This creates confusion as only the input related to that specific duplicated form should appear in the popup.

If anyone can provide insights or solutions on how to resolve this issue, it would be greatly appreciated. Please feel free to leave comments below if further clarification is needed.

Demo Code: View Demo

Credit Note: Majority of the code in the provided link was created by user @VimalPatel on StackOverflow. Credit goes to him for his contribution.

During my testing, I encountered difficulty installing Boostrap in the sandbox code. Hence, I replaced the popup feature with a show button to display the values received from the forms.

javascriptangulartypescriptformsangular-reactive-forms

Answer №1

To handle a form containing a FormArray, create a variable of type FormGroup. This variable will store the currently selected form. When a button is clicked, pass the current form as an argument to the show method.

<button (click)="openForm(form)">Show</button>
 
openForm(form: FormGroup) {
     this.selectedFormGroup = form;
}

To display the selected form value in your template, use the following code.

<div *ngIf="selectedFormGroup">
    {{selectedFormGroup.value | json}}
</div>

Check out the Working CodeSandBox for reference:

https://codesandbox.io/s/formarraydynamic-rqdhc?file=/src/app/app.component.html

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

Issue with Snackbar slide transition not functioning properly in mui 5

Transitioning from material-ui 4 to mui 5 has presented me with a challenge. Whenever I try to display my snackbar, an error pops up in the console. After some investigation, I realized that the issue lies within the Slide component that I'm using as ...

javascriptreactjsmaterial-ui

Error in Node.js: Unable to access properties of null value within Express

While using Express (with node.js) and MongoDB, I encountered an error when trying to view or update a user profile. The middleware token check worked fine getProfileFields:::::::::::::>>>>e: TypeError: Cannot read properties of null (rea ...

javascriptnode.jsexpress

Incorporate JavaScript to dynamically fetch image filenames from a directory and store them in an array

By clicking a button, retrieve the names of images from a folder and store them in an array using jQuery. I currently have a script that adds images to the body. In the directory images2, there are 20 images stored. The folder images2 is located in my i ...

javascriptjqueryhtml

Converting Data Types in Typescript

So I'm working with Data retrieved from a C# Rest Server. One of the values in the array is of type Date. When I try to perform calculations on it, like this: let difference = date1.getTime() - date2.getTime(); I encounter the following error messag ...

cangulardatetypescript

What are the steps for including and excluding components in Parallax JS?

When working with Parallax JS: I am trying to modify the components within the <li> tags of my menu, but I am unsure how to do so without restarting the plugin. I cannot seem to find the destroy command. Currently, I am using the JQuery version of ...

javascriptjqueryparallaxparallax.js

Inspect each page to confirm that the user has verified that they are of legal age

I'm currently developing a website (tobacco-related) that imposes an age validation requirement on all visitors before granting access to the site. I've implemented a form for age verification, but I'm stuck at how to store a cookie upon pas ...

javascriptvalidation

shortcut taken in inferring now exported

When using a default export, if the expression consists only of a variable identifier, the type inferencer defaults to the declaration of the variable instead of the actual type of the expression. Is this behavior intentional or is it a bug? // b.ts const ...

typescript

What is the best way to update the text on buttons once they've been clicked for a variety of buttons

I'm encountering an issue with multiple buttons where clicking on any button causes the text to change on the first button, rather than the one I actually clicked on. All buttons have the same id, and using different ids for each button seems impracti ...

javascriptjqueryhtml

Determine the type of input and output based on another argument

When working with a function that takes an object of either TypeA or TypeB, the first parameter is used to specify the type of the object and the returned type depends on this first parameter. The issue arises in TypeScript where the type of the object is ...

typescript

Executing a Node.js script using an absolute path

In the process of developing a basic app using Node.js and Express, I've encountered an issue. The script is located at path/to/script/server.js. When I run this script with node server.js while in the correct directory, everything functions correctly ...

javascriptnode.jsexpress

What is the best way to say hello using jQuery?

I need some assistance with a task that involves entering my name into an input field, clicking a button, and having an h1 tag display below the input saying Hello (my name)! Unfortunately, I am struggling to figure out how to achieve this. Below is the H ...

javascripthtmljquery

Utilizing Express-WS app and TypeScript to manage sessions

I am currently working on setting up a node server using Typescript with the help of express and express-ws. My goal is to include Sessions in my application, so I have implemented express-session. Below you can find some pseudo code: import * as session ...

typescriptexpresswebsocket

Guide on converting enums in Angular 6

I have been working on translating enums in Angular, but I'm facing a challenge. While I can read and display them in a dropdown menu, translating them is proving to be difficult. Here is an example of my code: export enum test { test1 = '1 - ...

angulartypescriptngx-translate

Changing the height of one Div based on another Div's height

I currently have a display of four divs positioned side by side. I am seeking a solution to ensure that the height of each div remains consistent, and should adjust accordingly if one of them increases in size due to added text content. For reference, ple ...

javascriptjqueryhtmlcss

What steps should be taken to link a frontend program on a separate port to a backend system?

Placing my frontend application in the public folder of a node.js application has allowed me to fetch form-data using the following request: try { await axios.post("/api/v1/contact-form", { name, email, msg, }); } My backend, ru ...

javascriptnode.jsfrontend

Error: The specified module 'sqlite' does not have an export named 'default' as requested

Having some difficulty with importing sqlite into my project. When I add this line: import sqlite from 'sqlite'; An error occurs: file:///D:/WebPro/WebProg/cwCode/dbInteract.js:2 import sqlite from 'sqlite'; ^^^^^^ SyntaxError: ...

javascriptnode.jssqlitenpm

Having difficulties with JavaScript's if statements

I'm facing an issue with my JavaScript code that is meant to modify the value of a price variable and then display the updated price. The problem arises when I have multiple select options, as the price only reflects the ID of the last statement. Here ...

javascripthtmlif-statement

Firebase web authentication is most effective upon the second attempt

I am currently working on a website that interacts with Google's firebase to read and write data. The website has both anonymous and email authentication enabled. Users can view the data anonymously, but in order to edit or write new data, they must s ...

javascripthtmlfirebase

Incorporate PHP form and display multiple results simultaneously on a webpage with automatic refreshing

I am currently in the process of designing a call management system for a radio station. The layout I have in mind involves having a form displayed in a div on the left side, and the results shown in another div on the right side. There are 6 phone lines a ...

javascriptphpjqueryhtmlajax

When I select a checkbox in Angular 2, the checkall function does not continue to mark the selected checkbox

How can I check if a checkbox is already marked when the selectAll method is applied, and then continue marking it instead of toggling it? selectAll() { for (let i = 0; i < this.suppliersCheckbox.length; i++) { if (this.suppliersCheckbox[i].type == " ...

angulartypescript