We just saw how to add values individually to a WeakMap and why it is different from a Map. However, it can be tedious to create a WeakMap one entry at a time.
In this recipe, we'll take a look at how to create a new Map with the preexisting data.
Creating a WeakMap from existing data
Getting ready
This recipe assumes that you already have a workspace that allows you to create and run ES modules in your browser. If you don't, refer to the first two chapters.
If you are unfamiliar with the WeakMap class, refer to the Setting and deleting entries from WeakMap recipe.
