/Javascript/AngularJS/Angular dynamic script loading

Angular dynamic script loading

import { Injectable } from "@angular/core";
import { Observable } from "rxjs/Observable";
import { Observer } from "rxjs/Observer";

@Injectable()
export class ScriptLoaderService {
    private scripts: ScriptModel[] = [];

    public load(script: ScriptModel): Observable<ScriptModel> {
        return new Observable<ScriptModel>((observer: Observer<ScriptModel>) => {
            var existingScript = this.scripts.find(s => s.name == script.name);

            // Complete if already loaded
            if (existingScript && existingScript.loaded) {
                observer.next(existingScript);
                observer.complete();
            }
            else {
                // Add the script
                this.scripts = [...this.scripts, script];

                // Load the script
                let scriptElement = document.createElement("script");
                scriptElement.type = "text/javascript";
                scriptElement.src = script.src;

                scriptElement.onload = () => {
                    script.loaded = true;
                    observer.next(script);
                    observer.complete();
                };

                scriptElement.onerror = (error: any) => {
                    observer.error("Couldn't load script " + script.src);
                };

                document.getElementsByTagName('body')[0].appendChild(scriptElement);
            }
        });
    }
}

export interface ScriptModel {
    name: string,
    src: string,
    loaded: boolean
}

Source: stackoverflow.com

Similar codes

3 votes271 views1 answer
Scoll a div to bottom in angular
Javascript AngularJS
0 vote257 views1 answer
Angular maxlength directive input type number
Javascript AngularJS
17 votes362 views2 answers
Angular random number between 1 and 10
Javascript AngularJS
1 vote329 views1 answer
Angular 10 set error on form controle
Javascript AngularJS
12 votes248 views5 answers
Update angular 10
Javascript AngularJS
0 vote263 views1 answer
File import angular
Javascript AngularJS
0 vote287 views1 answer
Import map in angular
Javascript AngularJS
0 vote244 views1 answer
How to decode base64 in angular
Javascript AngularJS
0 vote274 views1 answer
Styleurls component angular node_modules
Javascript AngularJS
0 vote281 views1 answer
Angular countdown begin stop pause
Javascript AngularJS