Angular developers often use *ngIf="foo$ | async as foo to consume an observable easily in templates. However, this approach does not work if your observable emits a boolean as the ngIf will hide the template when the source observable emits a falsy value.

*ngxVar allows developers to easily consume any observable (or static values) regardless of the type.

npm i --save ngx-var

import { NgxVarModule } from "ngx-var"

@NgModule({
  imports: [NgxVarModule],
})
class AppModule {}

(Examples taken from tests)

class TestComponent {
  numberObservable$: Observable<number>;
  boolObservable$: Observable<boolean>;
  sampleString = 'aa';
  sampleFunc = (a: number, b: number) => a * b;
}

<ng-container *ngxVar="boolObservable$ | async as bool">
    <span>{{bool ? 'true':'false'}}</span>
</ng-container>`

<ng-container *ngxVar="{ a: numberObservable$ | async, b: sampleString } as data">
    {{data.a}} {{data.b}}
</ng-container>

• Note: As you can see, sampleString is not an observable value, but can still be used.

<span *ngxVar="sampleFunc(5, 5); let data">
    {{data}}
</span>

Run ng test to execute the unit tests via Karma.

Run ng build to build the project. The build artifacts will be stored in the dist/ directory. Use the --prod flag for a production build.

The MIT License (MIT)

Copyright (c) 2021 Anirudh Varma

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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