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@ -23,7 +23,7 @@ Simply put, "reachable" values are those that are accessible or usable somehow.
2. Any other value is considered reachable if it's reachable from a root by a reference or by a chain of references. 2. Any other value is considered reachable if it's reachable from a root by a reference or by a chain of references.
For instance, if there's an object in a local variable, and that object has a property referencing another object, that object is considered reachable. And those that it references are also reachable. Detailed examples to follow. For instance, if there's an object in a global variable, and that object has a property referencing another object, that object is considered reachable. And those that it references are also reachable. Detailed examples to follow.
There's a background process in the JavaScript engine that is called [garbage collector](https://en.wikipedia.org/wiki/Garbage_collection_(computer_science)). It monitors all objects and removes those that have become unreachable. There's a background process in the JavaScript engine that is called [garbage collector](https://en.wikipedia.org/wiki/Garbage_collection_(computer_science)). It monitors all objects and removes those that have become unreachable.