https://www.php.net/manual/uk/weakmap.offsetexists.php
PHP: WeakMap::offsetExists - Manual
Checks whether a certain object is in the map
phpweakmapmanual
https://bugzilla.mozilla.org/show_bug.cgi?id=1796081
1796081 - Refactor WeakMap a little in preparation for parallel marking
RESOLVED (jcoppeard) in Core - JavaScript: GC. Last updated 2022-10-20.
a littlein preparationrefactorweakmapparallel
https://web.dev/shows/http-203/18MRkysjsC0?hl=it
WeakMap - HTTP203 | HTTP 203 | web.dev
web devweakmaphttp
https://blog.logrocket.com/weakmap-weakset-understanding-javascript-weak-references/
WeakMap and WeakSet: Understanding JavaScript weak references - LogRocket Blog
Jun 4, 2024 - Learn about weak references in JavaScript and how we can use them by utilizing the WeakMap and WeakSet objects.
weakmap and weaksetunderstandingjavascriptreferenceslogrocket