How to call JavaScript functions from Typescript in Angular 5?

Question

1. How and where to include JavaScript Files in Angular Project?

You need to include your JS file in the asset folder and refer this JS file in .angular-cli.json file.

Refer the snapshot’s,

Folder structure should be like this.

enter image description here

.angular-cli.json

enter image description here

2. How to call the JavaScript Functions from Typescript class?

your TS should be like this.

myJsFile.js file content.

enter image description here

This sample logic mentioned above will work, I have tried and tested using version 4, So I am expecting it to work with version 5 also.

Updating the answer for the new Angular version release. Working
perfectly till version 11.2.6.

Find the code (function with parameter) here for Angular11