调用无变量接收返回值的TypeScript函数是否会引发内存泄漏？

Great question! Let me break this down for you in plain terms—no overly technical jargon unless it’s necessary.

First off: Calling abc() without assigning its return value to a variable will NOT cause a memory leak, and here’s why:

• JavaScript (and by extension TypeScript, since it compiles to JavaScript under the hood) uses a garbage collection (GC) system built on mark-and-sweep logic. When you run abc(), the function creates an object, returns it, and if nothing holds an active reference to that object (like a variable, a property on another in-memory object, or a persistent closure), the GC will mark it as eligible for cleanup. Right after the abc(); line finishes executing, there’s no way to access that returned object anymore, so the GC will free up its allocated memory when it runs next.

• Think of it like making a paper airplane: if you hold it for a second then let go without passing it to anyone, it just falls to the floor, and eventually someone (the GC) comes along and disposes of it. If you hand it to a friend (assign it to a variable), they’re holding onto it, so it can’t be disposed of until they let go too.

Now, could there be edge cases? Sure—but they have nothing to do with whether you capture the return value:

• If inside abc(), the returned object is referenced by something that stays in memory (like a global variable, a setInterval callback that keeps running, or a closure that’s kept alive), then that object won’t be garbage collected regardless of whether you capture the return value. That’s a memory leak caused by the function’s internal logic, not the way you call it.
• The only "problem" you might run into is a logical one: if you intended to use that returned data later but forgot to capture it, that’s a code bug—but not a memory-related issue.

To sum up: Unless the returned object has lingering references from inside the function or elsewhere, ignoring the return value is totally safe—no memory leaks, no hidden technical issues.

内容的提问来源于stack exchange，提问作者Danaley