@ngodings/ngx-pipes

Useful pipes for Angular with no external dependencies with Latest Angular

Demo - Angular v15

https://npm.ngodings.com/packages/ngx-pipes

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Table of contents

• Installation
• String
  • timeAgo
  • aOrAn
  • shorten
  • firstcase
  • titlecase
  • prefixsuffix
• Array
  • range
  • reverse
  • unique
  • filterBy
  • orderBy
• Math
  • min
  • max
  • sum
  • average
  • precision
  • bytes

Getting Started

Installing and Importing

Install the package by command:

 npm install @ngodings/ngx-pipes --save

Import the module

1. Use npm to install the package

npm install @ngodings/ngx-pipes --save

2. You could either add into your module imports the NgxPipesModule in order to add all of the pipes, Or add a specific module such as NgxArrayPipesModule, NgxStringPipesModule, NgxMathPipesModule

import {NgxPipesModule} from '@ngodings/ngx-pipes';

@NgModule({
 // ...
 imports: [
   // ...
   NgxPipesModule
 ]
})

3. Pipes are also injectable and can be used in Components / Services / etc..

import {ReversePipe} from 'ngx-pipes';

@Component({
  // ..
  providers: [ReversePipe]
})
export class AppComponent {
  constructor(private reversePipe: ReversePipe) {
    this.reversePipe.transform('foo'); // Returns: "oof"
  }
  // ..
}

4. You can also use pipes as part of your template for ex.

<p>{{ 'foo' | reverse }}</p> <!-- Output: "oof" -->

and it's also possible to stack multiple pipes

<p>{{ 'foo' | titlecase | reverse }}</p> <!-- Output: "Oof" -->

String

timeAgo

Time ago pipe converts date to 'just now', 'X days ago', 'last week', 'X days ago', etc..

Usage: string | timeAgo

import * as moment from 'moment';

const now = new Date();

// timeAgo also supports moment.js objects
const lastWeek = moment().subtract(10, 'days');

<span>Updated: {{now | timeAgo}}</span> <!-- Output: "just now" -->
<span>Updated: {{lastWeek | timeAgo}}</span> <!-- Output: "last week" -->

aOrAn

Prefixes input string with "a" or "an".

Usage: string | aOrAn

<span>This is a picture of {{imageDescription | aOrAn}}</span>

shorten

Shortening a string by length and providing a custom string to denote an omission

Usage: string | shorten: length: [suffix|optional]: [wordBreak boolean|optional]

<p>{{'Hey foo bar' | shorten: 3: '...'}}</p> <!-- Output: "Hey..." -->

firstcase

Uppercase first letter of first word

<p>{{'foo bar' | firstcase }}</p> <!-- Output: "Foo bar" -->

titlecase

Uppercase first letter every word

<p>{{'foo bar' | titlecase }}</p> <!-- Output: "Foo Bar" -->
<p>{{'shaquille o'neal' | titlecase }}</p> <!-- Output: "Shaquille O'Neal" -->

prefixsuffix

Wrap a string between a prefix and a suffix

Usage: string | prefixsuffix: prefix: suffix

<p>{{'Foo' | prefixsuffix: 'nice prefix ': ' and awesome suffix!'}}</p> <!-- Output: "nice prefix Foo and awesome suffix!" -->

Array

range

Returns an array with range of numbers

Usage: range: [start: number, default = '1']: [count: number]: [step: number | optional, default = '1']

this.items = this.rangePipe.transform(1, 5); // Returns: [1, 2, 3, 4, 5]

<li *ngFor="let item of items"> <!-- Array: [1, 2, 3, 4, 5] -->

reverse

Reverses an array

Usage: array | reverse

this.items = [1, 2, 3];

<li *ngFor="let item of items | reverse"> <!-- Array: [3, 2, 1] -->

unique

Removes duplicates from array

Usage: array | unique: 'Property (Optional)'

this.items = [1, 2, 3, 1, 2, 3];

<li *ngFor="let item of items | unique"> <!-- Array: [1, 2, 3] -->

filterBy

Returns object array of grouped by items by discriminator

Usage: array | filterBy: [prop, nested.prop, ...]: search: [strict | optional]

this.users = [
   {id: 1, first_name: 'John', last_name: 'Doe', work: { company: 'Foo Tech' }},
   {id: 2, first_name: 'Jane', last_name: 'West', work: { company: 'AAA Solutions' }},
   {id: 3, first_name: 'Bruce', last_name: 'John', work: { company: 'Bar Tech' }},
   {id: 4, first_name: 'William', last_name: 'Cent', work: { company: 'Foo Tech' }, arr: [{name: 'foo'}]}
];

<!-- Returns users with `id` of 1 -->
<p>{{ users | filterBy: ['id']: 1 }}</p> 
<!-- Output: "[{id: 1, first_name: 'John', last_name: 'Doe', work: { company: 'Foo Tech', previous_company: '' }}]" -->

<!-- filterBy also support nested properties -->
<p>{{ users | filterBy: ['work.company']: 'Bar Tech' }}</p> 
<!-- Output: "[{ "id": 3, "first_name": "Bruce", "last_name": "John", "work": { "company": "Bar Tech", "previous_company": "" } }]" -->

<!-- filterBy also support nested properties inside of an array -->
<p>{{ users | filterBy: ['arr.name']: 'foo' }}</p> 
<!-- Output: "[{id: 4, first_name: 'William', last_name: 'Cent', work: { company: 'Foo Tech' }, arr: [{name: 'foo'}]}]" -->

<!-- Return users whose first name or last name is 'John'. -->
<p>{{ users | filterBy: ['first_name', 'last_name']: 'John' }}</p>
<!-- Output: "[{id: 1, first_name: 'John', last_name: 'Doe', work: { company: 'Foo Tech', previous_company: '' }}]" -->

<!-- Return users whose first name or last name is 'John' or 'Cent'. -->
<p>{{ users | filterBy: ['first_name', 'last_name']: ['John', 'Cent'] }}</p>
<!-- Output: "[{id: 1, first_name: 'John', last_name: 'Doe', work: { company: 'Foo Tech', previous_company: '' }}, {id: 3, first_name: 'Bruce', last_name: 'John', work: { company: 'Bar Tech' }}, {id: 4, first_name: 'William', last_name: 'Cent', work: { company: 'Foo Tech' }, arr: [{name: 'foo'}]}]" -->

orderBy

Returns ordered array by configuration

Usage: array | orderBy: [prop, nested.prop, array of props, ...]

const numbers = [2, 1, 3];

const obj = [
  {id: 4, name: 'Dave', amount: 2},
  {id: 2, name: 'Michael', amount: 2},
  {id: 3, name: 'Dan', amount: 1},
  {id: 1, name: 'John', amount: 1}
];

const deepObj = [
  {id: 1, name: 'John', amount: 1337, deep: {prop: 4}},
  {id: 2, name: 'Michael', amount: 42, deep: {prop: 2}},
  {id: 3, name: 'Dan', amount: 1, deep: {prop: 1}},
  {id: 4, name: 'Dave', amount: 2, deep: {prop: 3}}
];

<!-- Returns array ordered by value -->
<p>{{ numbers | orderBy }}</p>  <!-- Output: [1, 2, 3] -->
<p>{{ numbers | orderBy: '-' }}</p>  <!-- Output: [3, 2, 1] -->

<!-- Returns array ordered by value of property -->
<p>{{ deepObj | orderBy: 'amount' }}</p>  
<!-- Output: [{id: 3, ...}, {id: 4, ...}, {id: 2, ...}, {id: 1, ...}] -->
<p>{{ deepObj | orderBy: '-amount' }}</p>  
<!-- Output: [{id: 1, ...}, {id: 2, ...}, {id: 4, ...}, {id: 3, ...}] -->

<!-- Returns array ordered by value of deep property -->
<p>{{ deepObj | orderBy: 'deep.prop' }}</p>  
<!-- Output: [{id: 3, ...}, {id: 2, ...}, {id: 4, ...}, {id: 1, ...}] -->
<p>{{ deepObj | orderBy: '-deep.prop' }}</p>  
<!-- Output: [{id: 1, ...}, {id: 4, ...}, {id: 2, ...}, {id: 3, ...}] -->

<!-- Returns array ordered by mutliple properties -->
<p>{{ obj | orderBy: ['amount', 'id'] }}</p>  
<!-- Output: [{id: 1, ...}, {id: 3, ...}, {id: 2, ...}, {id: 4, ...}] -->

Math

min

Returns the minimum of a given array

Usage: array | min

<p>{{ [1, 2, 3, 1, 2, 3] | min }}</p> <!-- Output: "1" -->

max

Returns the maximum of a given array

Usage: array | max

<p>{{ [1, 2, 3, 1, 2, 3] | max }}</p> <!-- Output: "3" -->

sum

Returns the sum of a given array

Usage: array | sum

<p>{{ [1, 2, 3, 4] | sum }}</p> <!-- Output: "10" -->

average

Returns the average of a given array

Usage: array | average

<p>{{ [1, 2, 3] | average }}</p> <!-- Output: "2" -->
<p>{{ [1, 2] | average }}</p> <!-- Output: "1.5" -->

precision

Returns round of a number by precision

Usage: number | precision: [precision | default = 0]

<p>{{ 42.123 | precision }}</p> <!-- Output: "43" -->
<p>{{ 42.123 | precision: 2 }}</p> <!-- Output: "42.12" -->

bytes

Returns bytes with a unit symbol

Usage: number | bytes: [precision]

<p>{{ 10 | bytes }}</p> <!-- Output: "10 B" -->
<p>{{ 1048576 | bytes }}</p> <!-- Output: "1 KB" -->
<p>{{ 1073741824 | bytes }}</p> <!-- Output: "1 MB" -->
<p>{{ 1.0995116e12 | bytes }}</p> <!-- Output: "1 GB" -->

Development

Prepare your environment

• Install Node.js and NPM
• Install local dev dependencies: npm install while current directory is this repo

License

MIT @ Ali Abdul Wahid