feat(request filtering): now some url can be whitlisted

README.md

@@ -65,11 +65,18 @@ Overlay works with ```position:absolute```, ```top:0```, ```left:0```
 </div>
 ```
 
-## Feature
+## Features
 
 - NgxProgress supports multiple requests. If during the bar progress another request is fired, bar will not reset and keep going until all requests are completed.  
 - NgxProgress can be instantiated multiple times. Only the deepest one will be displayed
 
+#### Requests filtering
+
+You can filter the HTTP requests that would like to be avoided by the interceptor by providing an array of regex patterns:
+```
+  <ngx-progress [whitelist]="['auth', '[a-zA-Z]']"></ngx-progress>
+```
+
 ## Configuration
 
 ### Customization

projects/lib/src/lib/ngx-progress.component.ts

@@ -8,6 +8,10 @@ import { RegisterService } from './register.service';
   styleUrls: ['ngx-progress.component.scss'],
 })
 export class NgxProgressComponent implements OnInit, OnDestroy {
+  /**
+   * String array with regex pattern to avoid loader on specified apis
+   */
+  @Input() whitelist: string[] = [];
   /**
    * Color of spinner and progress bar.
    *
@@ -62,6 +66,7 @@ export class NgxProgressComponent implements OnInit, OnDestroy {
   }
 
   ngOnInit(): void {
+    this.progressService.regexUrl = this.whitelist;
     this.register.registerBar(this.self);
   }
 }

projects/lib/src/lib/ngx-progress.interceptor.ts

@@ -18,6 +18,11 @@ export class NgxProgressInterceptor implements HttpInterceptor {
     request: HttpRequest<any>,
     next: HttpHandler,
   ): Observable<HttpEvent<any>> {
+    for (const regexUrlItem of this.progressService._regexUrl) {
+      if (regexUrlItem.test(request.url)) {
+        return next.handle(request);
+      }
+    }
     this.progressService.start();
     return next.handle(request).pipe(
       map(event => {

projects/lib/src/lib/ngx-progress.service.ts

@@ -4,6 +4,16 @@ import { BarService } from './bar/bar.service';
 
 @Injectable({ providedIn: 'root' })
 export class NgxProgressService {
+  // tslint:disable-next-line:variable-name
+  _regexUrl: RegExp[] = [];
+  /**
+   * Is done the mapping from string to regex on variable assignment
+   * @param patterns: the whitelist
+   */
+  set regexUrl(patterns: string[]) {
+    this._regexUrl = patterns.map(p => new RegExp(p));
+  }
+
   private readonly endEmitter = new Subject();
   private readonly startEmitter = new Subject();