Angular 4 HttpClient Query Parameters

I ended up finding it through the IntelliSense on the get() function. So, I’ll post it here for anyone who is looking for similar information. Anyways, the syntax is nearly identical, but slightly different. Instead of using URLSearchParams() the parameters need to be initialized as HttpParams() and the property within the get() function is now … Read more

Adding a HTTP header to the Angular HttpClient doesn’t send the header, why?

The instances of the new HttpHeader class are immutable objects. Invoking class methods will return a new instance as result. So basically, you need to do the following: let headers = new HttpHeaders(); headers = headers.set(‘Content-Type’, ‘application/json; charset=utf-8’); or const headers = new HttpHeaders({‘Content-Type’:’application/json; charset=utf-8′}); Update: adding multiple headers let headers = new HttpHeaders(); headers … Read more

Difference between HttpModule and HttpClientModule

Use the HttpClient class from HttpClientModule if you’re using Angular 4.3.x and above: import { HttpClientModule } from ‘@angular/common/http’; @NgModule({ imports: [ BrowserModule, HttpClientModule ], … class MyService() { constructor(http: HttpClient) {…} It’s an upgraded version of http from @angular/http module with the following improvements: Interceptors allow middleware logic to be inserted into the pipeline … Read more

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