How to call JavaScript functions from Typescript in Angular 5?

Question

I\'m working on PDF Viewer development in Angular 5. I\'m done with writing HTML code for the UI part. Now I\'ve JavaScript files that provide functionality for the UI eleme

Answer 1

The given answer by Arun Raj R is perfect.

But for the angular 6+ project you need to take angular.json instead of angular-cli.json.

also if you want to pass parameter inside external function that come from js file than use just function name.

For Ex :

app.component.ts

import { Component, OnInit, ViewChild, ElementRef } from '@angular/core';
declare function myfunction: any; // just change here from arun answer.

@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {
    constructor() { }

    ngOnInit() { 
        myfunction('test1', 'test2');
    }
};

yourJs file :

function myfunction(params1, params2) {
    console.log('param1', params1);
    console.log('param2', params2);
}