v131 · javascript

Explicit resource management (sync)

This feature addresses a common pattern in software development regarding the lifetime and management of various resources (memory, I/O, etc.). This pattern generally includes the allocation of a resource and the ability to explicitly release critical resources.

concepts

  1. using

    using statement for deterministic resource disposal.

  2. DisposableStack

    Batch N resources into a stack and dispose them in reverse order. Includes move() ownership transfer.

  3. File handle lifecycle

    Side-by-side try/finally vs using with a mock file API and a leak counter. Throw mid-read and watch the difference.

  4. Build your own disposable

    A stopwatch class implementing [Symbol.dispose](). Feature-probe panel shows whether your build exposes the new symbols.

why it shipped

This feature addresses a common pattern in software development regarding the lifetime and management of various resources (memory, I/O, etc.). This pattern generally includes the allocation of a resource and the ability to explicitly release critical resources.

references