The array, with the reference, is managed by Container.īut again, this isn't really needed, since garbage collection in all modern browsers is mark-and-sweep and can handle cyclic references. So here, instead of the Containee class storing a direct reference to the Container instance, it stores a reference to a size 1 array containing the Container reference, which the Container instance itself can then delete itself from. No need to delete containerRef, no need for a Note: This is a property of JavaScript objects. ![]() Note that the value of this property is a reference to the function itself, not a string containing the function's name. ![]() Assumption here is, if the Container is destroyed, so will the Containee be The constructor data property of an Object instance returns a reference to the constructor function that created the instance object. order to ensure Containee's reference to Container is removed. Have to delete `this.thisRef` and not `this.thisRef`, in In this section, we will elaborate on this with code examples. In section 1 we learned that when the Person constructor, (or any other constructor) is invoked without the new operator it is invoked as a regular JavaScript function. Note: deconstructor is not an actual JS thing/keyword. Functions, Constructors And The new Operator. Here’s a demonstration wrapping URL.createObjectURL: class BlobURL ) The syntax has undergone a number of iterations, but given that it’s already past stage-3 review, it’s unlikely to change much now. ![]() It may land in the standard in 2023 or perhaps 2024. Aside from the already-mentioned FinalizationRegistry that provides support for non-deterministic finalization, there is (as of this writing, March 2023) a proposal in the works adding a deterministic, scope-based cleanup construct to the language: Explicit Resource Management. However, JavaScript will automatically create and execute an empty constructor if you have not defined any constructor method for a class.
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