Update xhr-loader.ts

[ReactWithRajesh]

This Line have issue it's throwing error while run time

This PR will... resolve the error while run time

Are there any points in the code the reviewer needs to double check?

Resolves issues: xhrLoader issue

Checklist

• changes have been done against master branch, and PR does not conflict
• new unit / functional tests have been added (whenever applicable)
• API or design changes are documented in API.md

[robwalch]

Can you provide steps to reproduce?

This Line have issue it's throwing error while run time

That is TypeScript. It is not intended for runtime.

[robwalch]

The ! is a TypeScript non-null assertion operator. It is not runtime code. This code must be converted from TS to JS before it is run.

this.callbacks! appears twice in this file. If we decide to remove the non-null assertions, we must remove both, and add null checks before them, like } else if (this.callbacks) { or if (!this.callbacks) { return; } for example.

[ReactWithRajesh]

This is Throwing Error as OnError on xhrrequest

[ReactWithRajesh]

I am using hls as multipalyer and controlling all through a common controller

[robwalch]

If you want to remove the non-null assertions, you must remove both, and add null checks before each of them.