http-loader.ts

import {HttpClient} from "@angular/common/http";
import {TranslateLoader} from "@ngx-translate/core";
import "rxjs/add/operator/map";

export class TranslateHttpLoader implements TranslateLoader {
    constructor(private http: HttpClient, private prefix: string = "/assets/i18n/", private suffix: string = ".json") {}

    /**
     * Gets the translations from the server
     * @param lang
     * @returns {any}
     */
    public getTranslation(lang: string): any {
        return this.http.get(`${this.prefix}${lang}${this.suffix}`);
    }
}