Explicit resource management

The AsyncDisposableStack() constructor creates AsyncDisposableStack objects.

The adopt() method of AsyncDisposableStack instances registers a value that doesn't implement the async disposable protocol to the stack by providing a custom disposer function.

The defer() method of AsyncDisposableStack instances takes a callback function to be called and awaited when the stack is disposed.

The disposeAsync() method of AsyncDisposableStack instances disposes this stack by calling all disposers registered to it in reverse order of registration, awaiting for each one's completion before calling the next one. If the stack is already disposed, this method does nothing.

The disposed accessor property of AsyncDisposableStack instances returns a boolean indicating whether or not this AsyncDisposableStack has been disposed or moved by doing any of the following:

The move() method of AsyncDisposableStack instances creates a new AsyncDisposableStack instance that contains the same disposers as this stack, and then marks this stack as disposed, without calling any disposers.

The use() method of AsyncDisposableStack instances registers a value that implements the async disposable protocol to the stack.

The DisposableStack object represents a stack of disposers to run when the stack itself is disposed. Disposer functions are executed in reverse order of registration, with strong error handling guarantees. Calling its move() method will transfer responsibility for calling the current registered disposers to a new DisposableStack and prevent registering any…

The DisposableStack() constructor creates DisposableStack objects.

The adopt() method of DisposableStack instances registers a value that doesn't implement the disposable protocol to the stack by providing a custom disposer function.

The defer() method of DisposableStack instances takes a callback function to be called when the stack is disposed.

The dispose() method of DisposableStack instances disposes this stack by calling all disposers registered to it in reverse order of registration. If the stack is already disposed, this method does nothing.

The disposed accessor property of DisposableStack instances returns a boolean indicating whether or not this DisposableStack has been disposed or moved by doing any of the following:

The move() method of DisposableStack instances creates a new DisposableStack instance that contains the same disposers as this stack, and then marks this stack as disposed, without calling any disposers.

The use() method of DisposableStack instances registers a value that implements the disposable protocol to the stack.

The SuppressedError object represents an error generated while handing another error. It is generated during resource disposal using Statements/using or Statements/await_using.

The SuppressedError() constructor creates SuppressedError objects.

The error data property of a SuppressedError instance contains a reference to the error that results in the suppression.

The suppressed data property of a SuppressedError instance contains a reference to the original error that got suppressed because a new error was generated while handling it.

The Symbol.asyncDispose static data property represents the well-known symbol Symbol.asyncDispose. The Statements/await_using declaration looks up this symbol on the variable initializer for the method to call when the variable goes out of scope.

The Symbol.dispose static data property represents the well-known symbol Symbol.dispose. The Statements/using declaration looks up this symbol on the variable initializer for the method to call when the variable goes out of scope.

The await using declaration declares block-scoped local variables that are asynchronously disposed. Like Statements/const, variables declared with await using must be initialized and cannot be reassigned. The variable's value must be either null, undefined, or an object with a…

The using declaration declares block-scoped local variables that are synchronously disposed. Like Statements/const, variables declared with using must be initialized and cannot be reassigned. The variable's value must be either null, undefined, or an object with a [[Symbol.dispose]()](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/dispose)…