js-promise-reject-30-05-2022.js

// Rejecting a promise can happen for many reasons. For example, if we have a network error, or if we have a problem with the data we are getting from the server.

// Let's imagine such a scenario: We have an order for dumplings, but we fried them instead of steaming them like the order says.

// We only have a recipe for fried dumplings.
const dumplingsRecipe = () =>
  new Promise((resolve) => {
    setTimeout(() => {
      resolve("Fried dumplings🥟");
    }, 1000);
  });

// We now receive an order for boiled dumplings:
const steamedDumplingsOrder = () =>
  new Promise((resolve, reject) => {
    // We have to cook our dumplings with our only recipe.
    dumplingsRecipe().then((dumplings) => {
      // If we cook our dumplings correctly, we can resolve the promise.
      if (dumplings === "Steamed dumplings🥟") {
        resolve(dumplings);
        // If we cook our dumplings incorrectly, we can reject the promise.
      } else {
        reject("❌ This is not the dumplings I ordered.");
      }
    });
  });

steamedDumplingsOrder().catch(console.error);

// Twitter reference: https://twitter.com/TommiEng/status/1531331593704554496