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Hace 4 días · Promises are unwrapped until they don't give back a promise, so resolving a promise with another is fine and normal. Any code that has an "inner promise" and "outer promise" is dipping its toes into callback hell for convenience imo (which was always the case, callback hell isn't even needed with callbacks, it's just way easier/faster/simpler than writing trampolines)
Hace 3 días · By using these utility functions from the @mrspartak/promises package, you can handle asynchronous operations in JavaScript more efficiently and elegantly. These tools not only simplify your code but also improve its readability and maintainability, making it easier to manage complex asynchronous workflows.
Hace 2 días · Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more.
Hace 4 días · javascript // Create a new Promise const myPromise = new Promise((resolve, reject) => { // Perform some asynchronous operation setTimeout(() => ... In this example, we create a new `Promise` called `myPromise` and chain the `.then` method to it.
Hace 5 días · A promise is an object that represents the eventual completion or failure of an asynchronous operation and its resulting value. const getDatabaseData = new Promise((resolve, reject) => { // asynchronous operation }); A promise is in one of three states: Pending: The initial state, before the promise is resolved or rejected. Fulfilled: The state ...
Hace 4 días · difference() returns a new set with elements in this set but not in the given set. symmetricDifference() returns a new set with elements in either set, but not in both. isSubsetOf() returns a boolean indicating if all elements of a set are in a specific set. isSupersetOf() returns a boolean indicating if all elements of a set are in a specific set.
Hace 3 días · Microtask Queue is like the Callback Queue, but Microtask Queue has higher priority. All the callback functions coming through Promises and Mutation Observer will go inside the Microtask Queue. For example, in the case of .fetch (), the callback function gets to the Microtask Queue.
