Angular (NGX) Intro.js

angular.json

{
  "projects": {
    "ngx-introjs": {
      "architect": {
        "build": {
          "options": {
            "styles": [
              "node_modules/intro.js/introjs.css"
            ],
            "scripts": [
              "node_modules/intro.js/intro.js"
            ]
          },
        },
        ...
      }
    }
  }
}

app.component.ts

import { Component } from '@angular/core';

// declare this to by pass typescript error
// can put this in index.d.ts file
declare var introJs: any

@Component({
  selector: 'app-root',
  template: `
    <a href='http://google.com/' data-intro='Hello step one!'>Hello</a>
  `,
})
export class AppComponent {
  ngOnInit() {
    introJs().start();
  }
}