ngx-loading-Plugin

The plugin is created for adding class to UI element by Observaving user interaction to application.

Reasons to Use This Plugin

Most of the time we are importing so many things to show loader, disable the Ui element and like the common one is creating a boolean state in component to check for action status, due to this plugin, we can easily handle by using angular custom directive, we can do the following things:

We adding CSS class to the UI element to define the status of the action.

• on action dispatch we adding active class.
• on action success we adding success class.
• on action throw error we adding error class.

Disable the UI element.

when action is dispatch the UI element is disabled so plugin prevents a double click on the UI element and enables once action status becomes success or error..

Note: you need to adding CSS against these classes, where user know button is press.

Installation

Run the following code in your terminal:

yarn add ngx-loading-plugin

or if you are using npm:

npm install ngx-loading-plugin

Usage

Setup Before Initial Use

Import NgxLoadingPluginModule into your root module like:

import { NgxLoadingPluginModule } from 'ngx-loading-plugin';

@NgModule({
  imports: [
    NgxLoadingPluginModule.forRoot()
  ]
})
export class AppModule {}

we can pass config object to forRoot to change css class name.

  NgxLoadingPluginModule.forRoot({
    cssClassName: {
      active: 'focus',
      success: 'done',
      error: 'error'
    }
  })

We passing a function to the directive. the function should return observable. you can see the following example.

loading.component.ts

export class LoadingComponent {
  constructor(private store: Store) {}

  onSubmit(): Observable<any> {
    const { email, password } = this.form.value;
    return this.httpRequest(email, password).pipe(
      tap((resp) => {
        /* here your code on success */
        alert(`${JSON.stringify(resp)}`);
      }), catchError((err) => {
        alert(err);
        /* here your code on error */
        return throwError(err);
      }));
  }
}

here onSubmit returning obserable and than we pass these function to directive in the current class context.

<input type="submit" value="Submit" class="button" [ngxLoading]="onSubmit.bind(this)">
  Submit
</button>

here 'bind' reserve the context of the current component. and send copy of function to the directive.

License and copy right

© Shahid Ahmad

License under the MIT License.