Evolv Execution-Plan Angular Integration

Angular can introduce extra timing concerns to updating the page in an Evolv project. It is not uncommon that Evolv can render the project changes, then have Angular update the DOM over the top.

This library gives extra control over Evolv's functionality on the page.

Importing the Library

Include in your project by running

npm install @evolv/angular-execution-plan

Directives

Evolv provides directives to automatically apply project changes based on Angular lifecycle hooks.

e.g. Include the AfterViewInitDirective and mark components with evolvAfterViewInit

<mat-horizontal-stepper>
  <mat-step evolvAfterViewInit>
    <ng-template matStepLabel>Payment</ng-template>
  </mat-step>
  <mat-step evolvAfterViewInit>
    <ng-template matStepLabel>Confirm</ng-template>
  </mat-step>
</mat-horizontal-stepper>

Direct Runtime Access

The ExecutionPlanService provides direct access to the Evolv execution plan and the runtime.

This allows you to directly reapply any changes

@Component({
  selector: 'example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.scss']
})
export class ExampleComponent {
  private runtime: any;

  constructor(evolv: ExecutionPlanService) {
    this.runtime = evolv.getRuntime();
  }

  manualRun = async (event) => {
    (await this.runtime).rerun();
  }
}

To configure how long you are willing to wait for Evolv to be present on the page, provide a custom value for the timeout

@NgModule({
  declarations: [
    AppComponent, ...
  ],
  imports: [
    ExecutionPlanModule, ...
  ],
  providers: [
    {provide: EXECUTION_PLAN_MAX_WAIT, useValue: 200 }
  ],
  ...
})

You can also directly access the Evolv instance and call any of the native functionality

@Component({
  selector: 'example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.scss']
})
export class ExampleComponent {
  private evolv: any;

  constructor(evolv: ExecutionPlanService) {
    this.evolv = evolv.getEvolv();
    (await this.evolv).on()
  }

  manualRun = async (event) => {
    (await this.runtime).on('stagecompleted', () => console.log('stagecompleted'));
  }
}

You can find an example site implementing these features here

Development

Code scaffolding

Run ng generate component component-name --project execution-plan to generate a new component. You can also use ng generate directive|pipe|service|class|guard|interface|enum|module --project execution-plan.

Note: Don't forget to add --project execution-plan or else it will be added to the default project in your angular.json file.

Build

Run ng build execution-plan to build the project. The build artifacts will be stored in the dist/ directory.

Publishing

After building your library with ng build execution-plan, go to the dist folder cd dist/execution-plan and run npm publish.

Running unit tests

Run ng test execution-plan to execute the unit tests via Karma.

Further help

To get more help on the Angular CLI use ng help or go check out the Angular CLI README.