WeakMap.prototype.get()

The get() method of WeakMap instances returns the value corresponding to the key in this WeakMap, or undefined if there is none. Object values are returned as the same reference that was originally stored, not as a copy, so mutations to the returned object will be reflected anywhere that reference is held, including inside the WeakMap.

Return value: The value associated with the specified key in the WeakMap object. If the key can’t be found, undefined is returned. Always returns undefined if key is not an object or a non-registered symbol.

Parameters: key The key of the value to return from the WeakMap object. Object keys are compared by reference, not by value.

Syntax example: get(key)