app.ts

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

declare const jsInsertTable: any;
declare const jsAddMergeField: any;
declare const jsSetMergeFieldText: any;

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'my-editor-app';

  // TypeScript wrapper function  
  tsInsertTable(cols: number, rows: number, id: number) {
    // call JavaScript
    jsInsertTable(cols, rows, id);
  }

  // TypeScript wrapper function  
  tsAddMergeField(name: string, text: string) {
    // call JavaScript
    jsAddMergeField(name, text);
  }

  // TypeScript wrapper function  
  tsSetMergeFieldText(text: string) {
    // call JavaScript
    jsSetMergeFieldText(text);
  }
}