I’m trying to define a namespace in javscript and I’m following this tutorial: https://www.geeksforgeeks.org/namespacing-in-javascript/

The first line is:

let MyApp = MyApp || {};

I thought MyApp || {} was to prevent accidental redeclaration of MyApp. But instead this just creates an error. Uncaught ReferenceError: MyApp is not defined.

Why doesn’t this work?