ngx-scroll-position-restoration
Version:
Scroll position restoration in Angular.
45 lines • 6.01 kB
JavaScript
import { NgModule } from '@angular/core';
import { CustomRouterOutletDirective } from './custom-router-outlet.directive';
import { defaultNgxScrollPositionRestorationConfig } from './default-ngx-scroll-position-restoration-config';
import { NGX_SCROLL_POSITION_RESTORATION_CONFIG_INJECTION_TOKEN } from './ngx-scroll-position-restoration-config-injection-token';
import { NgxScrollPositionRestorationService } from './ngx-scroll-position-restoration.service';
export class NgxScrollPositionRestorationModule {
constructor(ngxScrollPositionRestorationService) {
if (!NgxScrollPositionRestorationModule.serviceInitialized) {
ngxScrollPositionRestorationService.initialize();
NgxScrollPositionRestorationModule.serviceInitialized = true;
}
}
static forRoot(config) {
return ({
ngModule: NgxScrollPositionRestorationModule,
providers: [
{
provide: NGX_SCROLL_POSITION_RESTORATION_CONFIG_INJECTION_TOKEN,
useValue: Object.assign(defaultNgxScrollPositionRestorationConfig, config)
}
]
});
}
}
/**
* Since NgxScrollPositionRestorationModule can be imported in child modules, it is needed to track if the ngxScrollPositionRestorationService has been already initialized to avoid duplicate calls of the `initialize` method.
*/
NgxScrollPositionRestorationModule.serviceInitialized = false;
NgxScrollPositionRestorationModule.decorators = [
{ type: NgModule, args: [{
declarations: [
CustomRouterOutletDirective
],
exports: [
CustomRouterOutletDirective
],
providers: [
NgxScrollPositionRestorationService
]
},] }
];
NgxScrollPositionRestorationModule.ctorParameters = () => [
{ type: NgxScrollPositionRestorationService }
];
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