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Re-apply angular pipe on input

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by Abdul Rawoof A R dot icon Updated: Jan 22, 2024

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Guide Kit Guide Kit  

A pipe is the function we call to transform any expression or value in a template into another value. The value to which we apply the pipe is the input for our pipe function. The function will replace the original value with the returned value.  

Use pipes to transform strings, currency amounts, dates, and other data for display. Angular calls them pipes. 

Pipes are like magic helpers in Angular templates. You toss in some data, and a pipe transforms it into a different, more useful form. You only must set them up once, and then you can use them everywhere in your app. 


Types of Plumbing Pipes: 

There are five main types of pipes used for plumbing: copper, galvanized steel, PVC, ABS, and PEX. Each has its own strengths and best uses. Chlorinated polyvinyl chloride (CPVC) is also used. Use pipes to transform strings, currency amounts, dates, and other data for display. Pipes are simple functions in template expressions. They accept an input value and return a transformed value. Pipes are useful because you can use them throughout our application. You only need to declare each pipe once.  


Here is an example of how to re-apply angular pipe on input: 

Fig: Preview of the output that you will get on running this code from your IDE.

Code

How to re-apply angular pipe on input

Lines of Code : 19dotLicense : Strong Copyleft (CC BY-SA 4.0)

<input matInput type="text" placeholder="Test Price" [ngModel]="testPrice | mypipe | currency:'USD':'symbol':'2.2'" [ngModelOptions]="{updateOn:'blur'}" 
      (ngModelChange)="testPrice=$event"/>

import { Pipe, PipeTransform } from '@angular/core';
import { CurrencyPipe } from '@angular/common';
@Pipe({
  name: 'mypipe'
})
export class MypipePipe  extends CurrencyPipe implements PipeTransform {

  transform(value: any, args?: any): any {
    const val = value && value.split('$');
    const trans = val && val[1];
    return trans ? trans.replace(',', '') : value;
  }


}

Instructions

Follow the steps carefully to get the output easily.

  1. Install Visual Studio Code on your computer.
  2. Open terminal, install Angular using this command-'npm install -g @angular/cli@latest'.
  3. Create new folder using the command-'ng new folder_name'.
  4. Then open the folder from File->Open Folder.
  5. Create a new ts file(eg: mypipe.pipe.ts).
  6. Copy the snippet using 'copy' button and paste it into that ts file.
  7. Cut the HTML code and paste it into the HTML file.
  8. Import 'mypipe.pipe.ts' file in 'app.module.ts' file.
  9. Assign 'testPrice' property is equal to string (like testPrice = String;) in 'app.component.ts' file.
  10. Save the files and open the terminal, use this command-'ng serve' to generate the output in localhost.


I hope you found this helpful.


I found this code snippet by searching for 'reapply pipe on input in angular' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created and tested in Visual Studio Code 1.74.1.
  2. The solution is test in Angular CLI - 15.2.2.


Using this solution, we are able to re-apply angular pipe on input with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to re-apply angular pipe on input.

FAQ 

1. What is a pipe in Angular? 

A pipe is like a magical tool in Angular templates. It transforms values or expressions into more useful ones. It takes an input, does its thing, and gives you a transformed output. 


 2. How do pipes benefit Angular templates? 

Pipes are handy for converting and displaying data in a way. Pipes make strings, currency, and dates look right without much effort. 


 3. Why are pipes considered magic helpers? 

 Pipes work like behind-the-scenes helpers in Angular. You throw in your data, apply a pipe, and voila – it transforms into a more useful and display-ready format. Set them up once, use them anywhere. 


4. What are the types of plumbing pipes used in construction? 

 The five main types are copper, galvanized steel, PVC, ABS, and PEX. Each has its strengths and best uses in plumbing. Additionally, CPVC is also used for certain applications. 


5. How do pipes contribute to code simplicity in Angular applications? 

 Pipes keep things simple. You declare them once, and then you can use them wherever needed in your Angular app. They handle transformations, making your code cleaner and more readable. 

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