External JS Files Are Not Loading Correctly In Angular

In this blog, you will learn about external JS Files is not working or loading incorrectly in Angular.

I found that sometimes, external js will not work or load correctly in an Angular solution, especially while designing the theme. Specifically, I found that some external js having functions are not working or loading because which the theme was not functioning as per expectation. In my case, I was using the Admin LTE bootstrap theme, likewise, I faced a similar issue with some other themes as well.

After doing some research, I found a solution that we can load through a typescript file.

In my case, I loaded the js file through a common component as depicted below:

export class FooterComponent implements OnInit {

  constructor() { }

  ngOnInit() {
    this.loadJsFile("assets/adminlte/dist/js/demo.js");
  }
  public loadJsFile(url) {
    let node = document.createElement('script');
    node.src = url;
    node.type = 'text/javascript';
    document.getElementsByTagName('head')[0].appendChild(node);
  }
}

Description

Above, I created a function to load the js file in the head of the DOM and initiated that function in ngOnInit().

Alternatively, we can load the file in the module/component level as well.