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 In the JavaScript objects tutorial, you learned how to use the object literal syntax to create a new object. Introduction to JavaScript constructor functions. Note: This is a property of JavaScript objects. Summary: in this tutorial, you’ll learn about the JavaScript constructor function and how to use the new keyword to create an object. 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 Note: deconstructor is not an actual JS thing/keyword. 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.
0 Comments
Leave a Reply. |