That situation already exists today, but is inconsistent: some things need .close() and others .dispose() and yet others .destroy() and then there's things like

That situation already exists today, but is inconsistent: some things need .close() and others .dispose() and yet others .destroy() and then there's things like .end() and .reset() and .disconnect() and .revoke() and .unsubscribe(). All of those and more already exist in JS code today (just off the top of my head) with notes in library READMEs or other documentation to call them or possibly face resource leaks. The `using` keyword suggests a common name for these sorts of functions, [Symbol.dispose](), and provides lovely syntax sugar for try/catch/finally to make sure such things get called even in failure cases, and even provides suggested built-in objects DisposableStack and AsyncDisposableStack to help in managing multiple ones and transitioning older APIs like the many names I've seen, mentioned here. Even better, right now lint tools have to individually case rules specific to each library given the variety of names, but lint tools can make a nice global rule for all objects implementing [Symbol.dispose]() (just as they can warn when a Promise is left unawaited).