using_pipes.md

Using Pipes

Like a filter, a pipe also takes data as input and transforms it to the desired output. A basic example of using pipes is shown below:

import {Component} from '@angular/core'
@Component({
  selector: 'product-price',
  template: `<p>Total price of product is {{ price | currency }}</p>`
})
export class ProductPrice {
  price: number = 100.1234;
}

View Example

Passing Parameters

A pipe can accept optional parameters to modify the output. To pass parameters to a pipe, simply add a colon and the parameter value to the end of the pipe expression:

pipeName:parameterValue

You can also pass multiple parameters this way:

pipeName:parameter1:parameter2

import {Component} from '@angular/core';

@Component({
	selector: 'product-price',
	template: '<p>Total price of product is {{ price | currency:"CAD":true:"1.2-4"}}</p>'
})
export class ProductPrice {
  price: number = 100.123456;
}

View Example

Chaining Pipes

We can chain pipes together to make use of multiple pipes in one expression.

import {Component} from '@angular/core';

@Component({
	selector: 'product-price',
	template: '<p>Total price of product is {{ price | currency:"CAD":true:"1.2-4" | lowercase}}</p>'
})
export class ProductPrice {
  price: number = 100.123456;
}

View Example