@e-square/bdir

A bidirectional support lib for angular

Features

• ✅ Runtime compatible
• ✅ CDK compatible
• ✅ Language to Direction support

Table of Contents

• Installation
• Usage
• FAQ

Installation

NPM

npm install @e-square/bdir

Yarn

yarn add @e-square/bdir

Usage

1. Import the BDirModule:

   import { BrowserModule } from '@angular/platform-browser';
   import { NgModule } from '@angular/core';
   import { BDirModule } from '@e-square/bdir';
      
   @NgModule({
       imports: [
           BrowserModule,
           BDirModule
       ],
       bootstrap: [AppComponent]
   })
   export class AppModule { }

2. Add bdir directive In the application wrapper:

   <div id="app-wrapper" bdir> 
     <h1>
         Welcome to {{ title }}!
     </h1>
     <router-outlet></router-outlet>
   </div>

3. Start using scss mixins:

   @import "~@e-square/bdir/styles/mixins";
   h1 {
     color: darkslategray;
     @include padding-start(20px);
   }

   Now the h1 element will transpile to:

   h1 {
     color: darkslategray;
   }
   *[dir=ltr] h1 {
     padding-right: 20px; }
       
   *[dir=rtl] h1 {
     padding-left: 20px; }

API

The service and directive implements Angular CDK's Directionality class and uses its API.

BDirService

Methods:

*setLang(lang: Lang) - Setting the current language which will determine the direction value

*setDir(dir: Direction) - Set the current direction value.

*getDir$(): Observable<Direction> - Get the current direction value as observable.

*setLang(lang: Lang) - Get the opposite direction value as observable.

BDirDirective

bdir: 'start' | 'end' - Will set a dir attribute to the hosting element with rtl | ltr value accordingly start, is the default value.

  <element bdir="start"></element>
  <!-- Can also be written as -->
  <element bdir></element>

Tokens

RTL_LANGUAGES - Define which language will consider as rtl languages, default value: ['he', 'ar', 'hy', 'dv', 'ff', 'ku', 'fa'].

DEFAULT_LANG - Define the default language, default value: 'en'

Mixins

All mixins were written following to the css syntax, simply change left & right with start & end.

Also the mixins were developed in a way that the transpiled code will be as minimal as possible.

*$encapsulation property used for inner components to be affected by their host's direction by using angular's :host-context

padding-start($value, $encapsulation: true)

padding-end($value, $encapsulation: true)

margin-start($value, $encapsulation: true)

margin-end($value, $encapsulation: true)

border-start($value, $encapsulation: true)

border-end($value, $encapsulation: true)

float($start: true, $encapsulation: true)

dir($start: true, $encapsulation: true)

start($value, $encapsulation: true)

end($value, $encapsulation: true)

transformTranslate($x, $y: 0, $encapsulation: true)

transformScale($x, $y: 1, $encapsulation: true)

mirror($encapsulation: true)

FAQ

Contributors ✨

Thanks goes to these wonderful people (emoji key):

This project follows the all-contributors specification. Contributions of any kind welcome!