send http post in angular

import { HttpClientModule }    from '@angular/common/http';
...
@NgModule({
  imports: [
    HttpClientModule,
  ],
})    

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable()
export class ConfigService {
  constructor(private http: HttpClient) { }
}

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable()
export class ConfigService {
  constructor(private http: HttpClient) { }
  
  httpPost(data) {
	return this.http.post(endpoint,data);
  }
}