Freaks City

Macrotasks and Microtasks When a browser loads a standard <script> tag (ignoring attributes like defer), the execution of that script creates the initial macrotask. Within this execution context, various operations occur. For instance, if you set up a click listener or initiate a network request (like fetch), the callback functions for th ...

Constructor The Promise constructor accepts an executor function that receives two arguments: resolve and reject. This is where the core initialization logic resides. class SimplePromise { constructor(executor) { this.status = PENDING; this.onFulfilledCallbacks = []; this.onRejectedCallbacks = []; executor( ...