crash course in asynchronous javascript part 2 dev

Download 1M+ code from https://codegive.com/7c9ba4c crash course in asynchronous javascript, part 2: mastering promises and async/await this tutorial builds upon a foundational understanding of asynchronous javascript (part 1 would ideally cover callbacks and the event loop). we'll dive deep into promises and the elegant `async/await` syntax, transforming your asynchronous code from a tangled mess into readable, maintainable structures. *part 1 recap (brief):* asynchronous operations (like network requests or file i/o) don't block the main thread. callbacks were the original approach to handling their completion, but they lead to "callback hell" – nested callbacks making code hard to read and debug. *part 2: promises – handling asynchronous operations gracefully* a promise is an object representing the eventual completion (or failure) of an asynchronous operation. it has three states: *pending:* the initial state, neither fulfilled nor rejected. *fulfilled:* the operation completed successfully. *rejected:* the operation failed. *creating a promise:* a promise is created using the `promise` constructor, which takes a single argument: an "executor" function. this function receives two arguments: `resolve` and `reject`. `resolve` is called when the operation succeeds, passing the result. `reject` is called if the operation fails, passing the error. *consuming a promise: `.then()`, `.catch()`, and `.finally()`* we use `.then()` to handle the fulfilled state, `.catch()` to handle rejection, and `.finally()` for cleanup regardless of success or failure. *chaining promises:* the power of promises comes from chaining `.then()` methods. each `.then()` returns a new promise, allowing you to sequence asynchronous operations: *handling multiple promises: `promise.all()` and `promise.race()`* `promise.all()` waits for all provided promises to resolve and returns an array of their results. if any promise rejects, the entire `promise.all()` rejects. `promise.race()` returns ... #AsynchronousJavaScript #JavaScriptCrashCourse #numpy Asynchronous JavaScript Crash course JavaScript callbacks Promises Async/Await JavaScript event loop Error handling API integration JavaScript concurrency Non-blocking code JavaScript best practices HTTP requests Fetch API JavaScript functions Modern JavaScript techniques