How to call a function only after the external strip is fully loaded?

Question

JavaScript

I have a react app.
There is a script that, after loading and executing, adds the window.anyFunc function.
How to track that the script has already loaded?
That is, when window.anyFunc exists, call it, passing values ​​to it with redux.
The problem is that I call a function in the componentDidMount of the main application component, but at that moment the script may not yet be loaded and called.

Answer 1

For example like this https://www.npmjs.com/package/react-load-script