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function makeCar() {
    var car = {
        color: "red",
        convertible: true
    };

    return car;
}

I know that local variable car holds a reference to the object, but when the function finish, will the object be released resulting in memory leak?

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5
  • 2
    The object will only be released if there are no references to it. What would you expect var x = makeCar() to do? Commented Mar 2, 2018 at 15:19
  • 2
    JS is a garbage-collected language. Memory does not get allocated by assignment/initialisation, and is not released just because something goes out of scope. Commented Mar 2, 2018 at 15:20
  • memory is released by the garbage-collector only when there are no references to the object, yet there are some exceptions like WeakMap and WeakSet Commented Mar 2, 2018 at 15:24
  • Of course you can use this. The caller receives a "copy" of car. Commented Mar 2, 2018 at 15:28
  • 2
    Possible duplicate of Life of JavaScript objects & Memory Leaks Commented Mar 2, 2018 at 15:46
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