pipe in angular code example

Example 1: angular number pipe

//{{ value_expression | number [ : digitsInfo [ : locale ] ] }}

//Assume someNumber = 12.221
	<!--output '12'-->
	<p>{{ someNumber | number : '1.0-0'}}</p>

//The output here is '12' because we cut the decimals off
//with the number pipe

//More examples from Angular:

	//Assume:
    //pi: number = 3.14;
  	//e: number = 2.718281828459045;

	<!--output '2.718'-->
    <p>e (no formatting): {{e | number}}</p>

    <!--output '002.71828'-->
    <p>e (3.1-5): {{e | number:'3.1-5'}}</p>

    <!--output '0,002.71828'-->
    <p>e (4.5-5): {{e | number:'4.5-5'}}</p>

    <!--output '0 002,71828'-->
    <p>e (french): {{e | number:'4.5-5':'fr'}}</p>

    <!--output '3.14'-->
    <p>pi (no formatting): {{pi | number}}</p>

    <!--output '003.14'-->
    <p>pi (3.1-5): {{pi | number:'3.1-5'}}</p>

    <!--output '003.14000'-->
    <p>pi (3.5-5): {{pi | number:'3.5-5'}}</p>

    <!--output '-3' / unlike '-2' by Math.round()-->
    <p>-2.5 (1.0-0): {{-2.5 | number:'1.0-0'}}</p>

//More information here: https://angular.io/api/common/DecimalPipe

Example 2: command to create custom pipe in angular 6

ng generate pipe personName

Example 3: applying datepipe on interepolating date in html from typescipt

tooltip="{{recentDate | date: 'medium'}}" // Using interpolation

Example 4: angular pipes

//component.ts file:

import {Pipe, PipeTransform} from '@angular/core';  
@Pipe ({  
  name : 'sqrt'  
})  
export class SqrtPipe implements PipeTransform {  
  transform(val : number) : number {  
    return Math.sqrt(val);  
  }  
}  

//import SqrtPipe inside your module.ts ,
import { SqrtPipe } from './app.sqrt';  
declarations: [  
      SqrtPipe,  
],  
  
//then you can use this pipe in component.html file.  
// <h2>Square root of 625 is: {{625 | sqrt}}</h2>