We’ll also take a look at page-fetch: a new open source tool released by the Detectify Security Research team that can, amongst other things, help you hunt for prototype pollution issues in the wild! Jump to tool.
Those values can be basic types like numbers or strings, but also functions, arrays, or other objects. It’s pretty common in the world of Object Oriented Programming to want one object to be a “descendant” of another; the descendant inheriting the properties of its parent. Let’s look at an example: