PROMISE

Question : Write a program that takes one parameter, if the parameter is equal to “iam_boolean” then it should resolve the promise else it should reject the promise.

Solution

function iam_promise(key) {
  return new Promise((resolve, reject) => {
    if (key === "iam_boolean") {
      resolve("resolved");
    } else {
      reject("rejected");
    }
  });
}

iam_promise("iam_boolean")
  .then((data) => console.log(data))
  .catch((err) => console.log(err));
//Prints: resolved

iam_promise("Hello")
  .then((data) => console.log(data))
  .catch((err) => console.log(err));
//Prints: rejected