Modern ECMAScript TypeScript 6

13. Resource Scopes & Explicit Management

Enforce automatic resource cleanup on block-scope exit with explicit resource management and decouple asynchronous lifecycle resolvers.

resource-scopes.ts

typescript

// 1. Explicit Resource Management (ERM) with 'using' keyword
class DatabaseTransaction implements Disposable {
  constructor(public id: string) {
    console.log(`[BEGIN] Transaction ${id}`);
  }
  [Symbol.dispose]() {
    console.log(`[COMMIT/RELEASE] Transaction ${id} handle auto-freed.`);
  }
}
function executeOrder() {
  using tx = new DatabaseTransaction('tx_9011');
  // tx is deterministically disposed at the end of the block, even if an exception occurs
}
// 2. Promise.withResolvers() Decoupling
const { promise, resolve, reject } = Promise.withResolvers<string>();
setTimeout(() => resolve('Async pipeline ready'), 1000);

Resource Scopes & Explicit Management

Explicit Resource Management (ERM) with using statements and decoupled promise resolvers streamline asynchronous lifecycle management.

using (Symbol.dispose): Guarantees deterministic teardown for database connections, mutex locks, and file handles upon block scope exit.
Promise.withResolvers(): Exposes direct resolve and reject handles without nesting logic inside closure callbacks.

Scoped Resource Allocator (ERM) Idle

No active resource scopes initialised.

Promise.withResolvers Controller Status: IDLE

Buffer Content:

Idle

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